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d u a l , 1 6 - b i t , 1 6 0 0 m s p s , t x d a c + d i g i t a l - t o - a n a l o g c o n v e r t e r d a t a s h e e t a d 9 1 4 2 a r e v . 0 d o c u m e n t f e e d b a c k i n f o r m a t i o n f u r n i s h e d b y a n a l o g d e v i c e s i s b e l i e v e d t o b e a c c u r a t e a n d r e l i a b l e . h o w e v e r , n o r e s p o n s i b i l i t y i s a s s u m e d b y a n a l o g d e v i c e s f o r i t s u s e , n o r f o r a n y i n f r i n g e m e n t s o f p a t e n t s o r o t h e r r i g h t s o f t h i r d p a r t i e s t h a t m a y r e s u l t f r o m i t s u s e . s p e c i f i c a t i o n s s u b j e c t t o c h a n g e w i t h o u t n o t i c e . n o l i c e n s e i s g r a n t e d b y i m p l i c a t i o n o r o t h e r w i s e u n d e r a n y p a t e n t o r p a t e n t r i g h t s o f a n a l o g d e v i c e s . t r a d e m a r k s a n d r e g i s t e r e d t r a d e m a r k s a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s . o n e t e c h n o l o g y w a y , p . o . b o x 9 1 0 6 , n o r w o o d , m a 0 2 0 6 2 - 9 1 0 6 , u . s . a . t e l : 7 8 1 . 3 2 9 . 4 7 0 0 ? 2 0 1 3 a n a l o g d e v i c e s , i n c . a l l r i g h t s r e s e r v e d . t e c h n i c a l s u p p o r t w w w . a n a l o g . c o m f e a t u r e s s u p p o r t s i n p u t d a t a r a t e u p t o 5 7 5 m h z v e r y s m a l l i n h e r e n t l a t e n c y v a r i a t i o n : < 2 d a c c l o c k c y c l e s p r o p r i e t a r y l o w s p u r i o u s a n d d i s t o r t i o n d e s i g n 6 - c a r r i e r g s m a c l r = 7 9 d b c a t 2 0 0 m h z i f s f d r > 8 5 d b c ( b a n d w i d t h = 3 0 0 m h z ) a t z i f f l e x i b l e 1 6 - b i t l v d s i n t e r f a c e s u p p o r t s w o r d a n d b y t e l o a d d a t a i n t e r f a c e d l l s a m p l e e r r o r d e t e c t i o n a n d p a r i t y m u l t i p l e c h i p s y n c h r o n i z a t i o n f i x e d l a t e n c y a n d d a t a g e n e r a t o r l a t e n c y c o m p e n s a t i o n s e l e c t a b l e 2 , 4 , 8 i n t e r p o l a t i o n f i l t e r l o w p o w e r a r c h i t e c t u r e f s / 4 p o w e r s a v i n g c o a r s e m i x e r i n p u t s i g n a l p o w e r d e t e c t i o n e m e r g e n c y s t o p f o r d o w n s t r e a m a n a l o g c i r c u i t r y p r o t e c t i o n f i f o e r r o r d e t e c t i o n o n - c h i p n u m e r i c c o n t r o l o s c i l l a t o r a l l o w s c a r r i e r p l a c e m e n t a n y w h e r e i n t h e d a c n y q u i s t b a n d w i d t h t r a n s m i t e n a b l e f u n c t i o n f o r e x t r a p o w e r s a v i n g h i g h p e r f o r m a n c e , l o w n o i s e p l l c l o c k m u l t i p l i e r d i g i t a l g a i n a n d p h a s e a d j u s t m e n t f o r s i d e b a n d s u p p r e s s i o n d i g i t a l i n v e r s e s i n c f i l t e r l o w p o w e r : 1 . 8 w a t 1 . 6 g s p s , 1 . 5 w a t 1 . 2 5 g s p s , f u l l o p e r a t i n g c o n d i t i o n s 7 2 - l e a d l f c s p a p p l i c a t i o n s w i r e l e s s c o m m u n i c a t i o n s : 3 g / 4 g a n d m c - g s m b a s e s t a t i o n s , w i d e b a n d r e p e a t e r s , s o f t w a r e d e f i n e d r a d i o s w i d e b a n d c o m m u n i c a t i o n s : p o i n t - t o - p o i n t , l m d s / m m d s t r a n s m i t d i v e r s i t y / m i m o i n s t r u m e n t a t i o n a u t o m a t e d t e s t e q u i p m e n t g e n e r a l d e s c r i p t i o n t h e a d 9 1 4 2 a i s a d u a l , 1 6 - b i t , h i g h d y n a m i c r a n g e d i g i t a l - t o - a n a l o g c o n v e r t e r ( d a c ) t h a t p r o v i d e s a s a m p l e r a t e o f 1 6 0 0 m s p s , p e r m i t t i n g a m u l t i c a r r i e r g e n e r a t i o n u p t o t h e n y q u i s t f r e q u e n c y . t h e a d 9 1 4 2 a t x d a c + ? i n c l u d e s f e a t u r e s o p t i m i z e d f o r d i r e c t c o n v e r s i o n t r a n s m i t a p p l i c a t i o n s , i n c l u d i n g c o m p l e x d i g i t a l m o d u l a t i o n , i n p u t s i g n a l p o w e r d e t e c t i o n , a n d g a i n , p h a s e , a n d o f f s e t c o m p e n s a t i o n . t h e d a c o u t p u t s a r e o p t i m i z e d t o i n t e r f a c e s e a m l e s s l y w i t h a n a l o g q u a d r a t u r e m o d u l a t o r s , s u c h a s t h e a d l 5 3 7 x f - m o d s e r i e s a n d t h e a d r f 6 7 0 x s e r i e s f r o m a n a l o g d e v i c e s , i n c . a 3 - w i r e s e r i a l p o r t i n t e r f a c e p r o v i d e s f o r t h e p r o g r a m m i n g / r e a d b a c k o f m a n y i n t e r n a l p a r a m e t e r s . f u l l - s c a l e o u t p u t c u r r e n t c a n b e p r o g r a m m e d o v e r a r a n g e o f 9 m a t o 3 3 m a . t h e a d 9 1 4 2 a i s a v a i l a b l e i n a 7 2 - l e a d l f c s p . p r o d u c t h i g h l i g h t s 1 . w i d e s i g n a l b a n d w i d t h ( b w ) e n a b l e s e m e r g i n g w i d e b a n d a n d m u l t i b a n d w i r e l e s s a p p l i c a t i o n s . 2 . a d v a n c e d l o w s p u r i o u s a n d d i s t o r t i o n d e s i g n t e c h n i q u e s p r o v i d e h i g h q u a l i t y s y n t h e s i s o f w i d e b a n d s i g n a l s f r o m b a s e b a n d t o h i g h i n t e r m e d i a t e f r e q u e n c i e s . 3 . v e r y s m a l l i n h e r e n t l a t e n c y v a r i a t i o n s i m p l i f i e s b o t h s o f t w a r e a n d h a r d w a r e d e s i g n i n t h e s y s t e m . i t a l l o w s e a s y m u l t i c h i p s y n c h r o n i z a t i o n f o r m o s t a p p l i c a t i o n s . 4 . n e w l o w p o w e r a r c h i t e c t u r e i m p r o v e s p o w e r e f f i c i e n c y ( m w / m h z / c h a n n e l ) b y 3 0 % . 5 . i n p u t s i g n a l p o w e r a n d f i f o e r r o r d e t e c t i o n s i m p l i f y d e s i g n s f o r d o w n s t r e a m a n a l o g c i r c u i t r y p r o t e c t i o n . 6 . p r o g r a m m a b l e t r a n s m i t e n a b l e f u n c t i o n a l l o w s e a s y d e s i g n b a l a n c e b e t w e e n p o w e r c o n s u m p t i o n a n d w a k e u p t i m e .
a d 9 1 4 2 a d a t a s h e e t r e v . 0 | p a g e 2 o f 7 2 t a b l e o f c o n t e n t s f e a t u r e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 a p p l i c a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 g e n e r a l d e s c r i p t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 p r o d u c t h i g h l i g h t s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 r e v i s i o n h i s t o r y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 f u n c t i o n a l b l o c k d i a g r a m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 s p e c i f i c a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 d c s p e c i f i c a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 d i g i t a l s p e c i f i c a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 d a c l a t e n c y s p e c i f i c a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 l a t e n c y v a r i a t i o n s p e c i f i c a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 a c s p e c i f i c a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0 o p e r a t i n g s p e e d s p e c i f i c a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0 a b s o l u t e m a x i m u m r a t i n g s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 t h e r m a l r e s i s t a n c e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 e s d c a u t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 p i n c o n f i g u r a t i o n a n d f u n c t i o n d e s c r i p t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 t y p i c a l p e r f o r m a n c e c h a r a c t e r i s t i c s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5 t e r m i n o l o g y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 0 s e r i a l p o r t o p e r a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1 d a t a f o r m a t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1 s e r i a l p o r t p i n d e s c r i p t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1 s e r i a l p o r t o p t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1 d a t a i n t e r f a c e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 l v d s i n p u t d a t a p o r t s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 w o r d i n t e r f a c e m o d e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 b y t e i n t e r f a c e m o d e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 d a t a i n t e r f a c e c o n f i g u r a t i o n o p t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 d l l i n t e r f a c e m o d e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3 p a r i t y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 6 s e d o p e r a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 6 s e d e x a m p l e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 7 d e l a y l i n e i n t e r f a c e m o d e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 7 f i f o o p e r a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 9 r e s e t t i n g t h e f i f o . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 0 s e r i a l p o r t i n i t i a t e d f i f o r e s e t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 0 f r a m e i n i t i a t e d f i f o r e s e t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 0 d i g i t a l d a t a p a t h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 i n t e r p o l a t i o n f i l t e r s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 d i g i t a l m o d u l a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4 d a t a p a t h c o n f i g u r a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 5 d i g i t a l q u a d r a t u r e g a i n a n d p h a s e a d j u s t m e n t . . . . . . . . . . . . . . . . . . . 3 5 d c o f f s e t a d j u s t m e n t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 5 i n v e r s e s i n c f i l t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6 i n p u t s i g n a l p o w e r d e t e c t i o n a n d p r o t e c t i o n . . . . . . . . . . . . . . . . . . . . . . . . 3 6 t r a n s m i t e n a b l e f u n c t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 d i g i t a l f u n c t i o n c o n f i g u r a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 m u l t i d e v i c e s y n c h r o n i z a t i o n a n d f i x e d l a t e n c y . . . . . . . . . . . . . . . . . . . . . . . 3 8 v e r y s m a l l i n h e r e n t l a t e n c y v a r i a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 8 f u r t h e r r e d u c i n g t h e l a t e n c y v a r i a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 8 s y n c h r o n i z a t i o n i m p l e m e n t a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 9 s y n c h r o n i z a t i o n p r o c e d u r e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 9 i n t e r r u p t r e q u e s t o p e r a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 0 i n t e r r u p t w o r k i n g m e c h a n i s m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 0 i n t e r r u p t s e r v i c e r o u t i n e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 0 t e m p e r a t u r e s e n s o r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1 d a c i n p u t c l o c k c o n f i g u r a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 d r i v i n g t h e d a c c l k a n d r e f c l k i n p u t s . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 d i r e c t c l o c k i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 c l o c k m u l t i p l i c a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 p l l s e t t i n g s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 c o n f i g u r i n g t h e v c o t u n i n g b a n d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 a u t o m a t i c v c o b a n d s e l e c t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 m a n u a l v c o b a n d s e l e c t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 p l l e n a b l e s e q u e n c e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 a n a l o g o u t p u t s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4 t r a n s m i t d a c o p e r a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4 i n t e r f a c i n g t o m o d u l a t o r s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5 r e d u c i n g l o l e a k a g e a n d u n w a n t e d s i d e b a n d s . . . . . . . . . . . . . . . . . . 4 6 e x a m p l e s t a r t - u p r o u t i n e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7 d e v i c e c o n f i g u r a t i o n a n d s t a r t - u p s e q u e n c e 1 . . . . . . . . . . . . . . . . . . . . 4 7 d e v i c e c o n f i g u r a t i o n a n d s t a r t - u p s e q u e n c e 2 . . . . . . . . . . . . . . . . . . . . 4 7 d e v i c e c o n f i g u r a t i o n r e g i s t e r m a p a n d d e s c r i p t i o n . . . . . . . . . . . . . . . 4 9 s p i c o n f i g u r e r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 p o w e r - d o w n c o n t r o l r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 i n t e r r u p t e n a b l e 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 i n t e r r u p t e n a b l e 1 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 i n t e r r u p t f l a g 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 i n t e r r u p t f l a g 1 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 i n t e r r u p t s e l e c t 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 d a t a s h e e t a d 9 1 4 2 a r e v . 0 | p a g e 3 o f 7 2 i n t e r r u p t s e l e c t 1 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 f r a m e m o d e r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 d a t a c o n t r o l 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5 d a t a c o n t r o l 1 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5 d a t a c o n t r o l 2 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5 d a t a c o n t r o l 3 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5 d a t a s t a t u s 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5 d a c c l o c k r e c e i v e r c o n t r o l r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6 r e f c l o c k r e c e i v e r c o n t r o l r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6 p l l c o n t r o l 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6 p l l c o n t r o l 2 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 7 p l l c o n t r o l 3 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 7 p l l s t a t u s 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 7 p l l s t a t u s 1 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8 i d a c f s a d j u s t l s b r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8 i d a c f s a d j u s t m s b r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8 q d a c f s a d j u s t l s b r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8 q d a c f s a d j u s t m s b r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8 d i e t e m p e r a t u r e s e n s o r c o n t r o l r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 9 d i e t e m p e r a t u r e l s b r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 9 d i e t e m p e r a t u r e m s b r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 9 c h i p i d r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 9 i n t e r r u p t c o n f i g u a t i o n r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 9 s y n c c o n t r o l r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 0 f r a m e r e s e t c o n t r o l r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 0 f i f o l e v e l c o n f i g u r a t i o n r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 0 f i f o l e v e l r e a d b a c k r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1 f i f o c o n t r o l r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1 d a t a f o r m a t s e l e c t r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1 d a t a p a t h c o n t r o l r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1 i n t e r p o l a t i o n c o n t r o l r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 o v e r t h r e s h o l d c o n t r o l 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 o v e r t h r e s h o l d c o n t r o l 1 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 o v e r t h r e s h o l d c o n t r o l 2 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 i n p u t p o w e r r e a d b a c k l s b r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 i n p u t p o w e r r e a d b a c k m s b r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 n c o c o n t r o l r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 n c o f r e q u e n c y t u n i n g w o r d 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 n c o f r e q u e n c y t u n i n g w o r d 1 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 n c o f r e q u e n c y t u n i n g w o r d 2 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 n c o f r e q u e n c y t u n i n g w o r d 3 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 n c o p h a s e o f f s e t 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 n c o p h a s e o f f s e t 1 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 i q p h a s e a d j u s t 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 i q p h a s e a d j u s t 1 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 p o w e r d o w n d a t a i n p u t 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 i d a c d c o f f s e t 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 i d a c d c o f f s e t 1 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 q d a c d c o f f s e t 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 q d a c d c o f f s e t 1 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 i d a c g a i n a d j u s t r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 q d a c g a i n a d j u s t r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6 g a i n s t e p c o n t r o l 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6 g a i n s t e p c o n t r o l 1 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6 t x e n a b l e c o n t r o l r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6 d a c o u t p u t c o n t r o l r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 7 d l l c e l l e n a b l e 0 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 7 d l l c e l l e n a b l e 1 r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 7 s e d c o n t r o l r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 7 s e d p a t t e r n i 0 l o w b i t s r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8 s e d p a t t e r n i 0 h i g h b i t s r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8 s e d p a t t e r n q 0 l o w b i t s r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8 s e d p a t t e r n q 0 h i g h b i t s r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8 s e d p a t t e r n i 1 l o w b i t s r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8 s e d p a t t e r n i 1 h i g h b i t s r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8 s e d p a t t e r n q 1 l o w b i t s r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8 s e d p a t t e r n q 1 h i g h b i t s r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 9 p a r i t y c o n t r o l r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 9 p a r i t y e r r o r r i s i n g e d g e r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 9 p a r i t y e r r o r f a l l i n g e d g e r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 9 v e r s i o n r e g i s t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 9 d a c l a t e n c y a n d s y s t e m s k e w s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 0 d a c l a t e n c y v a r i a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 0 f i f o l a t e n c y v a r i a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 0 c l o c k g e n e r a t i o n l a t e n c y v a r i a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1 c o r r e c t i n g s y s t e m s k e w s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1 p a c k a g i n g a n d o r d e r i n g i n f o r m a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 o u t l i n e d i m e n s i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 o r d e r i n g g u i d e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 a d 9 1 4 2 a d a t a s h e e t r e v . 0 | p a g e 4 o f 7 2 r e v i s i o n h i s t o r y 1 2 / 1 3 ? r e v i s i o n 0 : i n i t i a l v e r s i o n d a t a s h e e t a d 9 1 4 2 a r e v . 0 | p a g e 5 o f 7 2 f u n c t i o n a l b l o c k d i a g r a m f i g u r e 1 . r e f a n d b i a s f s a d j v r e f p o w e r - o n r e s e t m u l t i c h i p s y n c h r o n i z a t i o n s e r i a l i n p u t / o u t p u t p o r t p r o g r a m m i n g r e g i s t e r s s d i o s c l k c s r e s e t t x e n i r q 1 i r q 2 d a c c l k p d a c c l k n r e f p / s y n c p r e f n / s y n c n c l o c k m u l t i p l i e r c l k r c v r r e f r c v r d a c _ c l k l v d s d a t a r e c e i v e r i n p u t p o w e r d e t e c t i o n d l l 1 3 - t a p f i f o 8 - s a m p l e d 1 5 p / d 1 5 n d 0 p / d 0 n d c i p / d c i n i n t e r f a c e c t r l f i f o c t r l s e d c t r l i n t e r p m o d e c t r l 1 h b 1 2 i n t e r p m o d e c t r l 2 h b 2 2 i n t e r p m o d e c t r l 3 h b 3 2 d a c _ c l k i n v s i n c g a i n a n d p h a s e c o n t r o l d c o f f s e t c o n t r o l o v e r t h r e s h o l d p r o t e c t i o n c o m p l e x m o d u l a t i o n f d a c / 4 m o d n c o d a c 1 1 6 - b i t i o u t 1 p i o u t 1 n 1 6 d a c 2 1 6 - b i t i o u t 2 p i o u t 2 n 1 6 1 0 g a i n 1 1 0 g a i n 2 i n t e r n a l c l o c k t i m i n g a n d c o n t r o l l o g i c d a c c l k s y n c a d 9 1 4 2 a f r a m e p / p a r i t y p f r a m e n / p a r i t y n s e d 1 1 9 0 1 - 0 0 1 a d 9 1 4 2 a d a t a s h e e t r e v . 0 | p a g e 6 o f 7 2 s p e c i f i c a t i o n s d c s p e c i f i c a t i o n s t m i n t o t m a x , a v d d 3 3 = 3 . 3 v , d v d d 1 8 = 1 . 8 v , c v d d 1 8 = 1 . 8 v , i o u t f s = 2 0 m a , m a x i m u m s a m p l e r a t e , u n l e s s o t h e r w i s e n o t e d . t a b l e 1 . p a r a m e t e r t e s t c o n d i t i o n s / c o m m e n t s m i n t y p m a x u n i t r e s o l u t i o n 1 6 b i t s a c c u r a c y d i f f e r e n t i a l n o n l i n e a r i t y ( d n l ) 2 . 1 l s b i n t e g r a l n o n l i n e a r i t y ( i n l ) 3 . 7 l s b m a i n d a c o u t p u t s o f f s e t e r r o r 0 . 0 0 1 0 + 0 . 0 0 1 % f s r g a i n e r r o r w i t h i n t e r n a l r e f e r e n c e 3 . 2 + 2 + 4 . 7 % f s r f u l l - s c a l e o u t p u t c u r r e n t b a s e d o n a 1 0 k e x t e r n a l r e s i s t o r b e t w e e n f s a d j a n d a v s s 1 9 . 0 6 1 9 . 8 2 0 . 6 m a o u t p u t c o m p l i a n c e r a n g e 1 . 0 + 1 . 0 v o u t p u t r e s i s t a n c e 1 0 m g a i n d a c m o n o t o n i c i t y g u a r a n t e e d s e t t l i n g t i m e t o w i t h i n 0 . 5 l s b 2 0 n s m a i n d a c t e m p e r a t u r e d r i f t o f f s e t 0 . 0 4 p p m / c g a i n 1 0 0 p p m / c r e f e r e n c e v o l t a g e 3 0 p p m / c r e f e r e n c e i n t e r n a l r e f e r e n c e v o l t a g e 1 . 1 7 1 . 1 9 v o u t p u t r e s i s t a n c e 5 k a n a l o g s u p p l y v o l t a g e s a v d d 3 3 3 . 1 3 3 . 3 3 . 4 7 v c v d d 1 8 1 . 7 1 . 8 1 . 9 v d i g i t a l s u p p l y v o l t a g e s d v d d 1 8 1 . 7 1 . 8 1 . 9 v d v d d 1 8 v a r i a t i o n o v e r o p e r a t i n g c o n d i t i o n s 1 2 . 5 % + 2 . 5 % v p o w e r c o n s u m p t i o n 2 m o d e f d a c = 7 3 7 . 2 8 m s p s n c o o f f 9 2 5 m w n c o o n 1 2 1 7 m w 2 m o d e f d a c = 9 8 3 . 0 4 m s p s n c o o f f 1 1 3 5 m w n c o o n 1 5 2 0 m w 4 m o d e f d a c = 7 3 7 . 2 8 m s p s n c o o f f 8 5 2 m w n c o o n 1 1 4 4 m w 4 m o d e f d a c = 9 8 3 . 0 4 m s p s n c o o f f 1 0 4 0 m w n c o o n 1 4 2 5 m w 4 m o d e f d a c = 1 2 2 8 . 8 m s p s n c o o f f 1 2 3 0 m w n c o o n 1 7 2 5 m w 4 m o d e f d a c = 1 4 7 4 . 5 6 m s p s n c o o f f 1 4 0 5 m w n c o o n 1 9 9 0 m w d a t a s h e e t a d 9 1 4 2 a r e v . 0 | p a g e 7 o f 7 2 p a r a m e t e r t e s t c o n d i t i o n s / c o m m e n t s m i n t y p m a x u n i t 8 m o d e f d a c = 1 6 0 0 m s p s n c o o f f 1 3 5 0 m w n c o o n 1 9 8 4 m w p h a s e - l o c k l o o p ( p l l ) 7 0 m w i n v e r s e s i n c f d a c = 1 4 7 4 . 5 6 m s p s 1 1 3 m w r e d u c e d p o w e r m o d e ( p o w e r - d o w n ) 9 6 . 6 m w a v d d 3 3 1 . 5 m a c v d d 1 8 4 2 . 3 m a d v d d 1 8 8 . 6 m a o p e r a t i n g r a n g e 4 0 + 2 5 + 8 5 c 1 t h i s t e r m s p e c i f i e s t h e m a x i m u m a l l o w a b l e v a r i a t i o n o f d v d d 1 8 o v e r o p e r a t i n g c o n d i t i o n s c o m p a r e d w i t h t h e d v d d 1 8 p r e s e n t e d t o t h e d e v i c e a t t h e t i m e t h e d a t a i n t e r f a c e d l l i s e n a b l e d . a d 9 1 4 2 a d a t a s h e e t r e v . 0 | p a g e 8 o f 7 2 d i g i t a l s p e c i f i c a t i o n s t m i n t o t m a x , a v d d 3 3 = 3 . 3 v , d v d d 1 8 = 1 . 8 v , c v d d 1 8 = 1 . 8 v , i o u t f s = 2 0 m a , m a x i m u m s a m p l e r a t e , u n l e s s o t h e r w i s e n o t e d . t a b l e 2 . p a r a m e t e r s y m b o l t e s t c o n d i t i o n s / c o m m e n t s m i n t y p m a x u n i t c m o s i n p u t l o g i c l e v e l i n p u t l o g i c h i g h d v d d 1 8 = 1 . 8 v 1 . 2 v l o g i c l o w d v d d 1 8 = 1 . 8 v 0 . 6 v c m o s o u t p u t l o g i c l e v e l o u t p u t l o g i c h i g h d v d d 1 8 = 1 . 8 v 1 . 4 v l o g i c l o w d v d d 1 8 = 1 . 8 v 0 . 4 v l v d s r e c e i v e r i n p u t s d a t a , f r a m e s i g n a l , a n d d c i i n p u t s i n p u t v o l t a g e r a n g e v i a o r v i b 8 2 5 1 6 7 5 m v i n p u t d i f f e r e n t i a l t h r e s h o l d v i d t h 1 7 5 + 1 7 5 m v i n p u t d i f f e r e n t i a l h y s t e r e s i s v i d t h h t o v i d t h l 2 0 m v r e c e i v e r d i f f e r e n t i a l i n p u t i m p e d a n c e r i n 1 0 0 d l l s p e e d r a n g e 2 5 0 5 7 5 m h z d a c u p d a t e r a t e 1 6 0 0 m s p s d a c a d j u s t e d u p d a t e r a t e 2 i n t e r p o l a t i o n 5 7 5 m s p s d a c c l o c k i n p u t ( d a c c l k p , d a c c l k n ) d i f f e r e n t i a l p e a k - t o - p e a k v o l t a g e 1 0 0 5 0 0 2 0 0 0 m v c o m m o n - m o d e v o l t a g e s e l f b i a s e d i n p u t , a c - c o u p l e d 1 . 2 5 v r e f c l k / s y n c c l k i n p u t ( r e f p / s y n c p , r e f n / s y n c n ) d i f f e r e n t i a l p e a k - t o - p e a k v o l t a g e 1 0 0 5 0 0 2 0 0 0 m v c o m m o n - m o d e v o l t a g e 1 . 2 5 v i n p u t c l o c k f r e q u e n c y 1 . 0 3 g h z f v c o 2 . 0 7 g h z 4 5 0 m h z s e r i a l p o r t i n t e r f a c e m a x i m u m c l o c k r a t e s c l k 4 0 m h z m i n i m u m p u l s e w i d t h h i g h t p w h 1 2 . 5 n s l o w t p w l 1 2 . 5 n s s d i o t o s c l k s e t u p t i m e t d s 1 . 5 n s s d i o t o s c l k h o l d t i m e t d h 0 . 6 8 n s c s t o s c l k s e t u p t i m e t d c s b 2 . 3 8 1 . 4 n s c s t o s c l k h o l d t i m e t d c s b 9 . 6 n s s d i o t o s c l k d e l a y t d v w a i t t i m e f o r v a l i d o u t p u t f r o m s d i o 1 1 n s s d i o h i g h - z t o c s t i m e f o r s d i o t o r e l i n q u i s h t h e o u t p u t b u s 8 . 5 n s s d i o l o g i c l e v e l v o l t a g e i n p u t h i g h v i h 1 . 2 1 . 8 v v o l t a g e i n p u t l o w v i l 0 0 . 5 v v o l t a g e o u t p u t h i g h i i h w i t h 2 m a l o a d i n g 1 . 3 6 2 v v o l t a g e o u t p u t l o w i i l w i t h 2 m a l o a d i n g 0 0 . 4 5 v d a t a s h e e t a d 9 1 4 2 a r e v . 0 | p a g e 9 o f 7 2 d a c l a t e n c y s p e c i f i c a t i o n s t m i n t o t m a x , a v d d 3 3 = 3 . 3 v , d v d d 1 8 = 1 . 8 v , c v d d 1 8 = 1 . 8 v , i o u t f s = 2 0 m a , f i f o l e v e l i s s e t t o 4 ( h a l f o f t h e f i f o d e p t h ) , u n l e s s o t h e r w i s e n o t e d . t a b l e 3 . p a r a m e t e r t e s t c o n d i t i o n s / c o m m e n t s m i n t y p m a x u n i t w o r d i n t e r f a c e m o d e f i n e / c o a r s e m o d u l a t i o n , i n v e r s e s i n c , g a i n / p h a s e c o m p e n s a t i o n o f f 2 i n t e r p o l a t i o n 1 3 4 d a c c l k c y c l e s 4 i n t e r p o l a t i o n 2 4 4 d a c c l k c y c l e s 8 i n t e r p o l a t i o n 4 8 1 d a c c l k c y c l e s b y t e i n t e r f a c e m o d e f i n e / c o a r s e m o d u l a t i o n , i n v e r s e s i n c , g a i n / p h a s e c o m p e n s a t i o n o f f 2 i n t e r p o l a t i o n 1 4 5 d a c c l k c y c l e s 4 i n t e r p o l a t i o n 2 7 1 d a c c l k c y c l e s 8 i n t e r p o l a t i o n 5 0 6 d a c c l k c y c l e s i n d i v i d u a l f u n c t i o n b l o c k s m o d u l a t i o n f i n e 1 7 d a c c l k c y c l e s c o a r s e 1 0 d a c c l k c y c l e s i n v e r s e s i n c 2 0 d a c c l k c y c l e s p h a s e c o m p e n s a t i o n 1 2 d a c c l k c y c l e s g a i n c o m p e n s a t i o n 1 6 d a c c l k c y c l e s l a t e n c y v a r i a t i o n s p e c i f i c a t i o n s t a b l e 4 . p a r a m e t e r m i n t y p m a x u n i t d a c l a t e n c y v a r i a t i o n 1 s y n c o f f 1 2 d a c c l k c y c l e s s y n c o n 0 1 d a c c l k c y c l e s 1 d a c l a t e n c y i s d e f i n e d a s t h e e l a p s e d t i m e f r o m a d a t a s a m p l e c l o c k e d a t t h e i n p u t t o t h e a d 9 1 4 2 a u n t i l t h e a n a l o g o u t p u t b e g i n s t o c h a n g e . a d 9 1 4 2 a d a t a s h e e t r e v . 0 | p a g e 1 0 o f 7 2 a c s p e c i f i c a t i o n s t m i n t o t m a x , a v d d 3 3 = 3 . 3 v , d v d d 1 8 = 1 . 8 v , c v d d 1 8 = 1 . 8 v , i o u t f s = 2 0 m a , m a x i m u m s a m p l e r a t e , u n l e s s o t h e r w i s e n o t e d . t a b l e 5 . p a r a m e t e r t e s t c o n d i t i o n s / c o m m e n t s m i n t y p m a x u n i t s p u r i o u s - f r e e d y n a m i c r a n g e ( s f d r ) 1 4 d b f s s i n g l e t o n e f d a c = 7 3 7 . 2 8 m s p s f o u t = 2 0 0 m h z b w = 1 2 5 m h z 8 5 d b c b w = 2 7 0 m h z 8 0 d b c f d a c = 9 8 3 . 0 4 m s p s f o u t = 2 0 0 m h z b w = 3 6 0 m h z 8 5 d b c f d a c = 1 2 2 8 . 8 m s p s f o u t = 2 8 0 m h z b w = 2 0 0 m h z 8 5 d b c b w = 5 0 0 m h z 7 5 d b c f d a c = 1 4 7 4 . 5 6 m s p s b w = 7 3 7 m h z f o u t = 1 0 m h z 8 5 d b c b w = 4 0 0 m h z f o u t = 2 8 0 m h z 8 0 d b c t w o - t o n e i n t e r m o d u l a t i o n d i s t o r t i o n ( i m d ) 1 2 d b f s e a c h t o n e f d a c = 7 3 7 . 2 8 m s p s f o u t = 2 0 0 m h z 8 0 d b c f d a c = 9 8 3 . 0 4 m s p s f o u t = 2 0 0 m h z 8 2 d b c f d a c = 1 2 2 8 . 8 m s p s f o u t = 2 8 0 m h z 8 0 d b c f d a c = 1 4 7 4 . 5 6 m s p s f o u t = 1 0 m h z 8 5 d b c f o u t = 2 8 0 m h z 7 9 d b c n o i s e s p e c t r a l d e n s i t y ( n s d ) e i g h t - t o n e , 5 0 0 k h z t o n e s p a c i n g f d a c = 7 3 7 . 2 8 m s p s f o u t = 2 0 0 m h z 1 6 0 d b m / h z f d a c = 9 8 3 . 0 4 m s p s f o u t = 2 0 0 m h z 1 6 1 . 5 d b m / h z f d a c = 1 2 2 8 . 8 m s p s f o u t = 2 8 0 m h z 1 6 4 . 5 d b m / h z f d a c = 1 4 7 4 . 5 6 m s p s f o u t = 1 0 m h z 1 6 6 d b m / h z f o u t = 2 8 0 m h z 1 6 2 . 5 d b m / h z w - c d m a a d j a c e n t c h a n n e l l e a k a g e r a t i o ( a c l r ) s i n g l e c a r r i e r f d a c = 9 8 3 . 0 4 m s p s f o u t = 2 0 0 m h z 8 1 d b c f d a c = 1 2 2 8 . 8 m s p s f o u t = 2 0 m h z 8 3 d b c f o u t = 2 8 0 m h z 8 0 d b c f d a c = 1 4 7 4 . 5 6 m s p s f o u t = 2 0 m h z 8 1 d b c f o u t = 2 8 0 m h z 8 0 d b c w - c d m a s e c o n d ( a c l r ) s i n g l e c a r r i e r f d a c = 9 8 3 . 0 4 m s p s f o u t = 2 0 0 m h z 8 5 d b c f d a c = 1 2 2 8 . 8 m s p s f o u t = 2 0 m h z 8 6 d b c f o u t = 2 8 0 m h z 8 6 d b c f d a c = 1 4 7 4 . 5 6 m s p s f o u t = 2 0 m h z 8 6 d b c f o u t = 2 8 0 m h z 8 5 d b c o p e r a t i n g s p e e d s p e c i f i c a t i o n s t a b l e 6 . i n t e r p o l a t i o n f a c t o r d v d d 1 8 , c v d d 1 8 = 1 . 8 v 5 % d v d d 1 8 , c v d d 1 8 = 1 . 9 v 5 % o r 1 . 8 v 2 % d v d d 1 8 , c v d d 1 8 = 1 . 9 v 2 % f d c i ( m s p s ) m a x i m u m f d a c ( m s p s ) m a x i m u m f d c i ( m s p s ) m a x i m u m f d a c ( m s p s ) m a x i m u m f d c i ( m s p s ) m a x i m u m f d a c ( m s p s ) m a x i m u m 2 5 7 5 1 1 5 0 5 7 5 1 1 5 0 5 7 5 1 1 5 0 4 3 5 0 1 4 0 0 3 7 5 1 5 0 0 4 0 0 1 6 0 0 8 1 7 5 1 4 0 0 1 8 7 . 5 1 5 0 0 2 0 0 1 6 0 0 d a t a s h e e t a d 9 1 4 2 a r e v . 0 | p a g e 1 1 o f 7 2 a b s o l u t e m a x i m u m r a t i n g s t a b l e 7 . p a r a m e t e r r a t i n g a v d d 3 3 t o g n d 0 . 3 v t o + 3 . 6 v d v d d 1 8 , c v d d 1 8 t o g n d 0 . 3 v t o + 2 . 1 v f s a d j , v r e f , i o u t 1 p , i o u t 1 n , i o u t 2 p , i o u t 2 n t o g n d 0 . 3 v t o a v d d 3 3 + 0 . 3 v d 1 5 p t o d 0 p , d 1 5 n t o d 0 n , f r a m e p / p a r i t y p , f r a m e n / p a r i t y n , d c i p , d c i n t o g n d 0 . 3 v t o d v d d 1 8 + 0 . 3 v d a c c l k p , d a c c l k n , r e f p , s y n c p , r e f n , s y n c n t o g n d 0 . 3 v t o c v d d 1 8 + 0 . 3 v r e s e t , i r q 1 , i r q 2 , c s , s c l k , s d i o t o g n d 0 . 3 v t o d v d d 1 8 + 0 . 3 v j u n c t i o n t e m p e r a t u r e 1 2 5 c s t o r a g e t e m p e r a t u r e r a n g e 6 5 c t o + 1 5 0 c t h e r m a l r e s i s t a n c e t h e e x p o s e d p a d ( e p a d ) m u s t b e s o l d e r e d t o t h e g r o u n d p l a n e ( a v s s ) f o r t h e 7 2 - l e a d l f c s p . t h e e p a d p r o v i d e s a n e l e c t r i c a l , t h e r m a l , a n d m e c h a n i c a l c o n n e c t i o n t o t h e b o a r d . t y p i c a l j a , j b , a n d j c v a l u e s a r e s p e c i f i e d f o r a 4 - l a y e r b o a r d i n s t i l l a i r . a i r f l o w i n c r e a s e s h e a t d i s s i p a t i o n , e f f e c t i v e l y r e d u c i n g j a a n d j b . t a b l e 8 . t h e r m a l r e s i s t a n c e p a c k a g e j a j b j c u n i t c o n d i t i o n s 7 2 - l e a d l f c s p 2 0 . 7 1 0 . 9 1 . 1 c / w e p a d s o l d e r e d t o g r o u n d p l a n e e s d c a u t i o n s t r e s s e s a b o v e t h o s e l i s t e d u n d e r a b s o l u t e m a x i m u m r a t i n g s m a y c a u s e p e r m a n e n t d a m a g e t o t h e d e v i c e . t h i s i s a s t r e s s r a t i n g o n l y ; f u n c t i o n a l o p e r a t i o n o f t h e d e v i c e a t t h e s e o r a n y o t h e r c o n d i t i o n s a b o v e t h o s e i n d i c a t e d i n t h e o p e r a t i o n a l s e c t i o n o f t h i s s p e c i f i c a t i o n i s n o t i m p l i e d . e x p o s u r e t o a b s o l u t e m a x i m u m r a t i n g c o n d i t i o n s f o r e x t e n d e d p e r i o d s m a y a f f e c t d e v i c e r e l i a b i l i t y . a d 9 1 4 2 a d a t a s h e e t r e v . 0 | p a g e 1 2 o f 7 2 p i n c o n f i g u r a t i o n a n d f u n c t i o n d e s c r i p t i o n s f i g u r e 2 . p i n c o n f i g u r a t i o n t a b l e 9 . p i n f u n c t i o n d e s c r i p t i o n s p i n n o . m n e m o n i c d e s c r i p t i o n 1 c v d d 1 8 1 . 8 v p l l s u p p l y . c v d d 1 8 s u p p l i e s t h e c l o c k r e c e i v e r s , c l o c k m u l t i p l i e r , a n d c l o c k d i s t r i b u t i o n . 2 r e f p / s y n c p p l l r e f e r e n c e c l o c k / s y n c h r o n i z a t i o n c l o c k i n p u t , p o s i t i v e . 3 r e f n / s y n c n p l l r e f e r e n c e c l o c k / s y n c h r o n i z a t i o n c l o c k i n p u t , n e g a t i v e . 4 c v d d 1 8 1 . 8 v p l l s u p p l y . c v d d 1 8 s u p p l i e s t h e c l o c k r e c e i v e r s , c l o c k m u l t i p l i e r , a n d c l o c k d i s t r i b u t i o n . 5 r e s e t r e s e t , a c t i v e l o w . c m o s l e v e l s w i t h r e s p e c t t o d v d d 1 8 . r e c o m m e n d e d r e s e t p u l s e l e n g t h i s 1 s . 6 t x e n a c t i v e h i g h t r a n s m i t p a t h e n a b l e . c m o s l e v e l s w i t h r e s p e c t t o d v d d 1 8 . a l o w l e v e l o n t h i s p i n t r i g g e r s t h r e e s e l e c t a b l e a c t i o n s i n t h e d a c . s e e t a b l e 8 7 f o r d e t a i l s . 7 d v d d 1 8 1 . 8 v d i g i t a l s u p p l y . p i n 7 s u p p l i e s p o w e r t o t h e d i g i t a l c o r e , d i g i t a l d a t a p o r t s , s e r i a l p o r t i n p u t / o u t p u t p i n s , r e s e t , i r q 1 , a n d i r q 2 . 8 f r a m e p / p a r i t y p f r a m e / p a r i t y i n p u t , p o s i t i v e . 9 f r a m e n / p a r i t y n f r a m e / p a r i t y i n p u t , n e g a t i v e . 1 0 d 1 5 p d a t a b i t 1 5 ( m s b ) , p o s i t i v e . 1 1 d 1 5 n d a t a b i t 1 5 ( m s b ) , n e g a t i v e . 1 2 d v d d 1 8 1 . 8 v d i g i t a l s u p p l y . p i n 1 2 s u p p l i e s t h e p o w e r t o t h e d i g i t a l c o r e a n d d i g i t a l d a t a p o r t s , s e r i a l p o r t i n p u t / o u t p u t p i n s , r e s e t , i r q 1 , a n d i r q 2 . 1 3 d 1 4 p d a t a b i t 1 4 , p o s i t i v e . 1 4 d 1 4 n d a t a b i t 1 4 , n e g a t i v e . 1 5 d 1 3 p d a t a b i t 1 3 , p o s i t i v e . 1 6 d 1 3 n d a t a b i t 1 3 , n e g a t i v e . 1 7 d 1 2 p d a t a b i t 1 2 , p o s i t i v e . 1 8 d 1 2 n d a t a b i t 1 2 , n e g a t i v e . 1 9 d v d d 1 8 1 . 8 v d i g i t a l s u p p l y . p i n 1 9 s u p p l i e s p o w e r t o t h e d i g i t a l c o r e , d i g i t a l d a t a p o r t s , s e r i a l p o r t i n p u t / o u t p u t p i n s , r e s e t , i r q 1 , a n d i r q 2 . 2 0 d 1 1 p d a t a b i t 1 1 , p o s i t i v e . 2 1 d 1 1 n d a t a b i t 1 1 , n e g a t i v e . 2 2 d 1 0 p d a t a b i t 1 0 , p o s i t i v e . 2 3 d 1 0 n d a t a b i t 1 0 , n e g a t i v e . 2 4 d 9 p d a t a b i t 9 , p o s i t i v e . 12 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 c v d d 1 8 r e f p / s y n c p r e f n / s y n c n c v d d 1 8 r e s e t t x e n d v d d 1 8 f r a m e p / p a r i t y p f r a m e n / p a r i t y n d 1 5 p d 1 5 n d v d d 1 8 d 1 4 p d 1 4 n d 1 3 p d 1 3 n 1 7 d 1 2 p 1 8 d 1 2 n 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 3 2 3 3 3 4 d v d d 1 8 d 1 1 p d 1 1 n d 1 0 p d 1 0 n d 9 p d 9 n d 8 p d 8 n d c i p d c i n d 7 p d 7 n d 6 p d 6 n d 5 p 3 5 d 5 n 3 6 d v d d 1 8 5 4 5 3 5 2 5 1 5 0 4 9 4 8 4 7 4 6 4 5 4 4 4 3 4 2 4 1 4 0 3 9 3 8 3 7 c s s c l k s d i o i r q 1 i r q 2 d v d d 1 8 d v d d 1 8 d 0 n d 0 p d 1 n d 1 p d v d d 1 8 d 2 n d 2 p d 3 n d 3 p d 4 n d 4 p 7 2 7 1 7 0 6 9 6 8 6 7 6 6 6 5 6 4 6 3 6 2 6 1 6 0 5 9 5 8 5 7 5 6 5 5 c v d d 1 8 c v d d 1 8 v r e f f s a d j a v d d 3 3 i o u t 1 p i o u t 1 n a v d d 3 3 c v d d 1 8 c v d d 1 8 d a c c l k p d a c c l k n c v d d 1 8 c v d d 1 8 a v d d 3 3 i o u t 2 n i o u t 2 p a v d d 3 3 a d 9 1 4 2 a t o p v i e w ( n o t t o s c a l e ) n o t e s 1 . e x p o s e d p a d ( e p a d ) m u s t b e s o l d e r e d t o t h e g r o u n d p l a n e ( a v s s , d v s s , c v s s ) . t h e e p a d p r o v i d e s a n e l e c t r i - c a l , t h e r m a l , a n d m e c h a n i c a l c o n n e c t i o n t o t h e b o a r d . 1 1 9 0 1 - 0 0 2 d a t a s h e e t a d 9 1 4 2 a r e v . 0 | p a g e 1 3 o f 7 2 p i n n o . m n e m o n i c d e s c r i p t i o n 2 5 d 9 n d a t a b i t 9 , n e g a t i v e . 2 6 d 8 p d a t a b i t 8 , p o s i t i v e . 2 7 d 8 n d a t a b i t 8 , n e g a t i v e . 2 8 d c i p d a t a c l o c k i n p u t , p o s i t i v e . 2 9 d c i n d a t a c l o c k i n p u t , n e g a t i v e . 3 0 d 7 p d a t a b i t 7 , p o s i t i v e . 3 1 d 7 n d a t a b i t 7 , n e g a t i v e . 3 2 d 6 p d a t a b i t 6 , p o s i t i v e . 3 3 d 6 n d a t a b i t 6 , n e g a t i v e . 3 4 d 5 p d a t a b i t 5 , p o s i t i v e . 3 5 d 5 n d a t a b i t 5 , n e g a t i v e . 3 6 d v d d 1 8 1 . 8 v d i g i t a l s u p p l y . p i n 3 6 s u p p l i e s p o w e r t o t h e d i g i t a l c o r e , d i g i t a l d a t a p o r t s , s e r i a l p o r t i n p u t / o u t p u t p i n s , r e s e t , i r q 1 , a n d i r q 2 . 3 7 d 4 p d a t a b i t 4 , p o s i t i v e . 3 8 d 4 n d a t a b i t 4 , n e g a t i v e . 3 9 d 3 p d a t a b i t 3 , p o s i t i v e . 4 0 d 3 n d a t a b i t 3 , n e g a t i v e . 4 1 d 2 p d a t a b i t 2 , p o s i t i v e . 4 2 d 2 n d a t a b i t 2 , n e g a t i v e . 4 3 d v d d 1 8 1 . 8 v d i g i t a l s u p p l y . p i n 4 3 s u p p l i e s p o w e r t o t h e d i g i t a l c o r e , d i g i t a l d a t a p o r t s , s e r i a l p o r t i n p u t / o u t p u t p i n s , r e s e t , i r q 1 , a n d i r q 2 . 4 4 d 1 p d a t a b i t 1 , p o s i t i v e . 4 5 d 1 n d a t a b i t 1 , n e g a t i v e . 4 6 d 0 p d a t a b i t 0 , p o s i t i v e . 4 7 d 0 n d a t a b i t 0 , n e g a t i v e . 4 8 d v d d 1 8 1 . 8 v d i g i t a l s u p p l y . p i n 4 8 s u p p l i e s p o w e r t o t h e d i g i t a l c o r e , d i g i t a l d a t a p o r t s , s e r i a l p o r t i n p u t / o u t p u t p i n s , r e s e t , i r q 1 , a n d i r q 2 . 4 9 d v d d 1 8 1 . 8 v d i g i t a l s u p p l y . p i n 4 9 s u p p l i e s p o w e r t o t h e d i g i t a l c o r e , d i g i t a l d a t a p o r t s , s e r i a l p o r t i n p u t / o u t p u t p i n s , r e s e t , i r q 1 , a n d i r q 2 . 5 0 i r q 2 s e c o n d i n t e r r u p t r e q u e s t . o p e n - d r a i n , a c t i v e l o w o u t p u t . c o n n e c t a n e x t e r n a l p u l l - u p t o d v d d 1 8 t h r o u g h a 1 0 k r e s i s t o r . 5 1 i r q 1 f i r s t i n t e r r u p t r e q u e s t . o p e n - d r a i n , a c t i v e l o w o u t p u t . c o n n e c t a n e x t e r n a l p u l l - u p t o d v d d 1 8 t h r o u g h a 1 0 k r e s i s t o r . 5 2 s d i o s e r i a l p o r t d a t a i n p u t / o u t p u t . c m o s l e v e l s w i t h r e s p e c t t o d v d d 1 8 . 5 3 s c l k s e r i a l p o r t c l o c k i n p u t . c m o s l e v e l s w i t h r e s p e c t t o d v d d 1 8 . 5 4 c s s e r i a l p o r t c h i p s e l e c t . a c t i v e l o w ( c m o s l e v e l s w i t h r e s p e c t t o d v d d 1 8 ) . 5 5 a v d d 3 3 3 . 3 v a n a l o g s u p p l y . 5 6 i o u t 2 p q d a c p o s i t i v e c u r r e n t o u t p u t . 5 7 i o u t 2 n q d a c n e g a t i v e c u r r e n t o u t p u t . 5 8 a v d d 3 3 3 . 3 v a n a l o g s u p p l y . 5 9 c v d d 1 8 1 . 8 v c l o c k s u p p l y . s u p p l i e s c l o c k r e c e i v e r s a n d c l o c k d i s t r i b u t i o n . 6 0 c v d d 1 8 1 . 8 v c l o c k s u p p l y . s u p p l i e s c l o c k r e c e i v e r s a n d c l o c k d i s t r i b u t i o n . 6 1 d a c c l k n d a c c l o c k i n p u t , n e g a t i v e . 6 2 d a c c l k p d a c c l o c k i n p u t , p o s i t i v e . 6 3 c v d d 1 8 1 . 8 v c l o c k s u p p l y . s u p p l i e s c l o c k r e c e i v e r s a n d c l o c k d i s t r i b u t i o n . 6 4 c v d d 1 8 1 . 8 v c l o c k s u p p l y . s u p p l i e s c l o c k r e c e i v e r s a n d c l o c k d i s t r i b u t i o n . 6 5 a v d d 3 3 3 . 3 v a n a l o g s u p p l y . 6 6 i o u t 1 n i d a c n e g a t i v e c u r r e n t o u t p u t . 6 7 i o u t 1 p i d a c p o s i t i v e c u r r e n t o u t p u t . 6 8 a v d d 3 3 3 . 3 v a n a l o g s u p p l y . 6 9 f s a d j f u l l - s c a l e c u r r e n t o u t p u t a d j u s t . p l a c e a 1 0 k r e s i s t o r f r o m t h i s p i n t o g n d . 7 0 v r e f v o l t a g e r e f e r e n c e . n o m i n a l l y 1 . 2 v o u t p u t . d e c o u p l e v r e f t o g n d . 7 1 c v d d 1 8 1 . 8 v c l o c k s u p p l y . p i n 7 1 s u p p l i e s t h e c l o c k r e c e i v e r s , c l o c k m u l t i p l i e r , a n d c l o c k d i s t r i b u t i o n . 7 2 c v d d 1 8 1 . 8 v c l o c k s u p p l y . p i n 7 2 s u p p l i e s t h e c l o c k r e c e i v e r s , c l o c k m u l t i p l i e r , a n d c l o c k d i s t r i b u t i o n . a d 9 1 4 2 a d a t a s h e e t r e v . 0 | p a g e 1 4 o f 7 2 p i n n o . m n e m o n i c d e s c r i p t i o n e p a d e x p o s e d p a d . t h e e x p o s e d p a d ( e p a d ) m u s t b e s o l d e r e d t o t h e g r o u n d p l a n e ( a v s s , d v s s , c v s s ) . t h e e p a d p r o v i d e s a n e l e c t r i c a l , t h e r m a l , a n d m e c h a n i c a l c o n n e c t i o n t o t h e b o a r d . d a t a s h e e t a d 9 1 4 2 a r e v . 0 | p a g e 1 5 o f 7 2 t y p i c a l p e r f o r m a n c e c h a r a c t e r i s t i c s f i g u r e 3 . s i n g l e t o n e ( 0 d b f s ) s f d r v s . f o u t i n t h e f i r s t n y q u i s t z o n e o v e r f d a c f i g u r e 4 . s i n g l e t o n e s e c o n d h a r m o n i c v s . f o u t i n t h e f i r s t n y q u i s t z o n e o v e r d i g i t a l b a c k o f f , f d a c = 1 4 7 4 . 5 6 m h z f i g u r e 5 . s i n g l e t o n e t h i r d h a r m o n i c v s . f o u t i n t h e f i r s t n y q u i s t z o n e o v e r d i g i t a l b a c k o f f , f d a c = 1 4 7 4 . 5 6 m h z f i g u r e 6 . i n - b a n d , s i n g l e t o n e s f d r ( e x c l u d i n g s e c o n d h a r m o n i c ) v s . f o u t i n 8 0 m h z a n d 3 0 0 m h z b a n d w i d t h s , f d a c = 7 3 7 . 2 8 m h z f i g u r e 7 . i n - b a n d , s i n g l e t o n e s f d r ( e x c l u d i n g s e c o n d h a r m o n i c ) v s . f o u t i n 8 0 m h z a n d 3 0 0 m h z b w , f d a c = 9 8 3 . 0 4 m h z f i g u r e 8 . i n - b a n d , s i n g l e t o n e s f d r ( e x c l u d i n g s e c o n d h a r m o n i c ) v s . f o u t i n 8 0 m h z a n d 3 0 0 m h z b a n d w i d t h s , f d a c = 1 2 2 8 . 8 m h z 0 ? 9 0 ? 8 0 ? 7 0 ? 6 0 ? 5 0 ? 4 0 ? 3 0 ? 2 0 ? 1 0 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 s f d r ( d b c ) f o u t ( m h z ) f d a c = 7 3 7 . 2 8 m h z f d a c = 9 8 3 . 0 4 m h z f d a c = 1 2 2 8 . 8 m h z f d a c = 1 4 7 4 . 5 6 m h z 1 1 9 0 1 - 0 0 3 0 ? 1 0 0 ? 9 0 ? 8 0 ? 7 0 ? 6 0 ? 5 0 ? 4 0 ? 3 0 ? 2 0 ? 1 0 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 s e c o n d h a r m o n i c ( d b c ) f o u t ( m h z ) 0 d b f s ? 6 d b f s ? 1 2 d b f s ? 1 6 d b f s 1 1 9 0 1 - 0 0 5 0 ? 1 0 0 ? 9 0 ? 8 0 ? 7 0 ? 6 0 ? 5 0 ? 4 0 ? 3 0 ? 2 0 ? 1 0 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 t h i r d h a r m o n i c ( d b c ) f o u t ( m h z ) 0 d b f s ? 6 d b f s ? 1 2 d b f s ? 1 6 d b f s 1 1 9 0 1 - 0 0 7 ? 6 0 < ? 8 5 ? 8 5 ? 8 0 ? 7 5 ? 7 0 ? 6 5 0 2 0 4 0 6 0 8 0 1 0 0 1 4 0 1 8 0 1 2 0 1 6 0 2 0 0 i n - b a n d s f d r ( d b c ) f o u t ( m h z ) b w = 8 0 m h z , ? 6 d b f s b w = 8 0 m h z , ? 1 2 d b f s b w = 3 0 0 m h z , ? 6 d b f s b w = 3 0 0 m h z , ? 1 2 d b f s 0 ( $ 1 6 ? 1 1 9 0 1 - 0 0 4 ? 6 0 < ? 8 5 ? 8 5 ? 8 0 ? 7 5 ? 7 0 ? 6 5 0 3 0 0 2 5 0 2 0 0 1 5 0 1 0 0 5 0 i n - b a n d s f d r ( d b c ) f o u t ( m h z ) b w = 8 0 m h z , ? 6 d b f s b w = 8 0 m h z , ? 1 2 d b f s b w = 3 0 0 m h z , ? 6 d b f s b w = 3 0 0 m h z , ? 1 2 d b f s 0 ( $ 1 6 ? 1 1 9 0 1 - 0 0 6 ? 6 0 < ? 8 5 ? 8 5 ? 8 0 ? 7 5 ? 7 0 ? 6 5 0 3 5 0 3 0 0 2 5 0 2 0 0 1 5 0 1 0 0 5 0 i n - b a n d s f d r ( d b c ) f o u t ( m h z ) b w = 8 0 m h z , ? 6 d b f s b w = 8 0 m h z , ? 1 2 d b f s b w = 3 0 0 m h z , ? 6 d b f s b w = 3 0 0 m h z , ? 1 2 d b f s 0 ( $ 1 6 ? 1 1 9 0 1 - 0 0 8 a d 9 1 4 2 a d a t a s h e e t r e v . 0 | p a g e 1 6 o f 7 2 f i g u r e 9 . i n - b a n d , s i n g l e t o n e s f d r ( e x c l u d i n g s e c o n d h a r m o n i c ) v s . f o u t i n 8 0 m h z a n d 3 0 0 m h z b a n d w i d t h s , f d a c = 1 4 7 4 . 5 6 m h z f i g u r e 1 0 . t w o t o n e , t h i r d i m d v s . f o u t o v e r f d a c f i g u r e 1 1 . t w o t o n e , t h i r d i m d v s . f o u t o v e r d i g i t a l b a c k o f f , f d a c = 1 4 7 4 . 5 6 m h z f i g u r e 1 2 . t w o t o n e , t h i r d i m d v s . f o u t o v e r t o n e s p a c i n g , f d a c = 1 4 7 4 . 5 6 m h z f i g u r e 1 3 . s i n g l e t o n e ( 0 d b f s ) n s d v s . f o u t o v e r f d a c f i g u r e 1 4 . s i n g l e t o n e n s d v s . f o u t o v e r d i g i t a l b a c k o f f , f d a c = 1 4 7 4 . 5 6 m h z ? 6 0 < ? 8 5 ? 8 5 ? 8 0 ? 7 5 ? 7 0 ? 6 5 0 3 5 0 3 0 0 2 5 0 2 0 0 1 5 0 1 0 0 5 0 i n - b a n d s f d r ( d b c ) f o u t ( m h z ) b w = 8 0 m h z , ? 6 d b f s b w = 8 0 m h z , ? 1 2 d b f s b w = 3 0 0 m h z , ? 6 d b f s b w = 3 0 0 m h z , ? 1 2 d b f s 0 ( $ 1 6 ? 1 1 9 0 1 - 0 0 9 0 ? 9 0 ? 8 0 ? 7 0 ? 6 0 ? 5 0 ? 4 0 ? 3 0 ? 2 0 ? 1 0 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 i m d ( d b c ) f o u t ( m h z ) f d a c = 7 3 7 . 2 8 m h z f d a c = 9 8 3 . 0 4 m h z f d a c = 1 2 2 8 . 8 m h z f d a c = 1 4 7 4 . 5 6 m h z 1 1 9 0 1 - 0 1 1 0 ? 1 2 0 ? 1 0 0 ? 8 0 ? 6 0 ? 4 0 ? 2 0 0 8 0 0 6 0 0 7 0 0 5 0 0 4 0 0 3 0 0 2 0 0 1 0 0 i m d ( d b c ) f o u t ( m h z ) 0 d b f s ? 6 d b f s ? 9 d b f s 1 1 9 0 1 - 0 1 3 0 ? 1 2 0 ? 1 0 0 ? 8 0 ? 6 0 ? 4 0 ? 2 0 0 8 0 0 6 0 0 7 0 0 5 0 0 4 0 0 3 0 0 2 0 0 1 0 0 i m d ( d b c ) f o u t ( m h z ) 0 . 6 m h z t o n e s p a c i n g 1 6 m h z t o n e s p a c i n g 3 5 m h z t o n e s p a c i n g 1 1 9 0 1 - 0 1 0 ? 1 5 2 ? 1 6 8 ? 1 6 6 ? 1 6 4 ? 1 6 2 ? 1 6 0 ? 1 5 8 ? 1 5 6 ? 1 5 4 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 n s d ( d b m / h z ) f o u t ( m h z ) f d a c = 7 3 7 . 2 8 m h z f d a c = 9 8 3 . 0 4 m h z f d a c = 1 2 2 8 . 8 m h z f d a c = 1 4 7 4 . 5 6 m h z 1 1 9 0 1 - 0 1 2 ? 1 5 2 ? 1 6 8 ? 1 6 6 ? 1 6 4 ? 1 6 2 ? 1 6 0 ? 1 5 8 ? 1 5 6 ? 1 5 4 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 n s d ( d b m / h z ) f o u t ( m h z ) 0 d b f s ? 6 d b f s ? 1 2 d b f s ? 1 6 d b f s 1 1 9 0 1 - 0 1 4 d a t a s h e e t a d 9 1 4 2 a r e v . 0 | p a g e 1 7 o f 7 2 f i g u r e 1 5 . 1 c w c d m a n s d v s . f o u t , o v e r f d a c f i g u r e 1 6 . s i n g l e t o n e n s d v s . f o u t , f d a c = 1 4 7 4 . 2 8 m h z , p l l o n a n d o f f f i g u r e 1 7 . 1 c w c d m a , f i r s t a d j a c e n t a c l r v s . f o u t , p l l o n a n d o f f f i g u r e 1 8 . 1 c w c d m a , s e c o n d a d j a c e n t a c l r v s . f o u t , p l l o n a n d o f f f i g u r e 1 9 . t w o t o n e , t h i r d i m d p e r f o r m a n c e , i f = 2 8 0 m h z , f d a c = 1 4 7 4 . 2 8 m h z f i g u r e 2 0 . 1 c w c d m a a c l r p e r f o r m a n c e , i f = 2 8 0 m h z , f d a c = 1 4 7 4 . 2 8 m h z ? 1 5 0 ? 1 5 2 ? 1 7 0 ? 1 6 8 ? 1 6 6 ? 1 6 4 ? 1 6 2 ? 1 6 0 ? 1 5 8 ? 1 5 6 ? 1 5 4 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 n s d ( d b m / h z ) f o u t ( m h z ) 7 3 7 . 2 m h z 9 8 3 . 0 4 m h z 1 2 2 8 . 8 m h z 1 4 7 4 . 5 6 m h z 1 1 9 0 1 - 2 0 0 ? 1 5 0 ? 1 5 2 ? 1 6 8 ? 1 6 6 ? 1 6 4 ? 1 6 2 ? 1 6 0 ? 1 5 8 ? 1 5 6 ? 1 5 4 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 n s d ( d b m / h z ) f o u t ( m h z ) p l l o f f p l l o n 1 1 9 0 1 - 0 1 5 ? 6 0 ? 8 5 ? 8 0 ? 7 5 ? 7 0 ? 6 5 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 a c l r ( d b c ) f o u t ( m h z ) f d a c = 1 4 7 4 . 5 6 m h z , p l l o f f , 0 d b f s f d a c = 1 4 7 4 . 5 6 m h z , p l l o n , 0 d b f s f d a c = 1 2 2 8 . 8 m h z , p l l o f f , 0 d b f s f d a c = 1 2 2 8 . 8 m h z , p l l o n , 0 d b f s 1 1 9 0 1 - 1 0 0 ? 6 0 ? 9 0 ? 8 5 ? 8 0 ? 7 5 ? 7 0 ? 6 5 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 7 0 0 8 0 0 a c l r ( d b c ) f o u t ( m h z ) f d a c = 1 4 7 4 . 5 6 m h z , p l l o f f , 0 d b f s f d a c = 1 4 7 4 . 5 6 m h z , p l l o n , 0 d b f s f d a c = 1 2 2 8 . 8 m h z , p l l o f f , 0 d b f s f d a c = 1 2 2 8 . 8 m h z , p l l o n , 0 d b f s 1 1 9 0 1 - 1 0 1 1 1 9 0 1 - 0 1 6 1 1 9 0 1 - 0 1 7 a d 9 1 4 2 a d a t a s h e e t r e v . 0 | p a g e 1 8 o f 7 2 f i g u r e 2 1 . s i n g l e t o n e f d a c = 1 4 7 4 . 5 6 m h z , f o u t = 2 8 0 m h z , 1 4 d b f s f i g u r e 2 2 . 4 c w c d m a a c l r p e r f o r m a n c e , i f = 2 8 0 m h z , f d a c = 1 4 7 4 . 2 8 m h z f i g u r e 2 3 . s i n g l e t o n e s f d r f d a c = 1 4 7 4 . 5 6 m h z , 4 i n t e r p o l a t i o n , f o u t = 1 0 m h z , 1 4 d b f s f i g u r e 2 4 . t o t a l p o w e r b a s e l i n e c o n s u m p t i o n v s . f d a c o v e r i n t e r p o l a t i o n f i g u r e 2 5 . d v d d 1 8 s u p p l y c u r r e n t v s . f d a c o v e r i n t e r p o l a t i o n f i g u r e 2 6 . d v d d 1 8 s u p p l y c u r r e n t v s . f d a c o v e r d i g i t a l f u n c t i o n s 1 1 9 0 1 - 0 1 8 1 1 9 0 1 - 0 1 9 1 1 9 0 1 - 0 2 0 1 6 0 0 1 4 0 0 4 0 0 6 0 0 8 0 0 1 0 0 0 1 2 0 0 2 0 0 1 6 0 0 1 4 0 0 1 2 0 0 1 0 0 0 8 0 0 6 0 0 4 0 0 t o t a l b a s e l i n e p o w e r c o n s u m p t i o n ( m w ) f d a c ( m h z ) 1 1 9 0 1 - 0 2 1 2 4 8 6 0 0 5 0 0 2 0 0 4 0 0 1 0 0 3 0 0 0 2 0 0 4 0 0 6 0 0 8 0 0 1 0 0 0 1 2 0 0 1 4 0 0 1 6 0 0 d v d d s u p p l y c u r r e n t ( m a ) f d a c ( m h z ) 1 1 9 0 1 - 0 2 4 2 4 8 3 5 0 3 0 0 1 0 0 2 0 0 2 5 0 5 0 1 5 0 0 2 0 0 4 0 0 6 0 0 8 0 0 1 0 0 0 1 2 0 0 1 4 0 0 1 6 0 0 d v d d 1 8 s u p p l y c u r r e n t ( m a ) f d a c ( m h z ) 1 1 9 0 1 - 0 2 2 n c o i n v e r s e s i n c d i g i t a l g a i n a n d p h a s e f s / 4 m o d u l a t i o n d a t a s h e e t a d 9 1 4 2 a r e v . 0 | p a g e 1 9 o f 7 2 f i g u r e 2 7 . c v d d 1 8 , a v d d 3 3 s u p p l y c u r r e n t v s . f d a c 2 5 0 2 0 0 1 5 0 1 0 0 5 0 2 0 0 4 0 0 6 0 0 8 0 0 1 0 0 0 1 2 0 0 1 4 0 0 1 6 0 0 s u p p l y c u r r e n t ( m a ) f d a c ( m h z ) 1 1 9 0 1 - 0 2 3 c v d d 1 8 , p l l o f f a v d d 3 3 c v d d 1 8 , p l l o n a d 9 1 4 2 a d a t a s h e e t r e v . 0 | p a g e 2 0 o f 7 2 t e r m i n o l o g y i n t e g r a l n o n l i n e a r i t y ( i n l ) i n l i s t h e m a x i m u m d e v i a t i o n o f t h e a c t u a l a n a l o g o u t p u t f r o m t h e i d e a l o u t p u t , d e t e r m i n e d b y a s t r a i g h t l i n e d r a w n f r o m z e r o s c a l e t o f u l l s c a l e . d i f f e r e n t i a l n o n l i n e a r i t y ( d n l ) d n l i s t h e m e a s u r e o f t h e v a r i a t i o n i n a n a l o g v a l u e , n o r m a l i z e d t o f u l l s c a l e , a s s o c i a t e d w i t h a 1 l s b c h a n g e i n d i g i t a l i n p u t c o d e . o f f s e t e r r o r o f f s e t e r r o r i s t h e d e v i a t i o n o f t h e o u t p u t c u r r e n t f r o m t h e i d e a l o f 0 m a . f o r i o u t 1 p , 0 m a o u t p u t i s e x p e c t e d w h e n a l l i n p u t s a r e s e t t o 0 . f o r i o u t 1 n , 0 m a o u t p u t i s e x p e c t e d w h e n a l l i n p u t s a r e s e t t o 1 . g a i n e r r o r g a i n e r r o r i s t h e d i f f e r e n c e b e t w e e n t h e a c t u a l a n d i d e a l o u t p u t s p a n . t h e a c t u a l s p a n i s d e t e r m i n e d b y t h e d i f f e r e n c e b e t w e e n t h e o u t p u t w h e n a l l i n p u t s a r e s e t t o 1 a n d t h e o u t p u t w h e n a l l i n p u t s a r e s e t t o 0 . o u t p u t c o m p l i a n c e r a n g e t h e o u t p u t c o m p l i a n c e r a n g e i s t h e r a n g e o f a l l o w a b l e v o l t a g e a t t h e o u t p u t o f a c u r r e n t o u t p u t d a c . o p e r a t i o n b e y o n d t h e m a x i m u m c o m p l i a n c e l i m i t s c a n c a u s e e i t h e r o u t p u t s t a g e s a t u r a t i o n o r b r e a k d o w n , r e s u l t i n g i n n o n l i n e a r p e r f o r m a n c e . t e m p e r a t u r e d r i f t t e m p e r a t u r e d r i f t i s s p e c i f i e d a s t h e m a x i m u m c h a n g e f r o m t h e a m b i e n t ( 2 5 c ) v a l u e t o t h e v a l u e a t e i t h e r t m i n o r t m a x . f o r o f f s e t a n d g a i n d r i f t , t h e d r i f t i s r e p o r t e d i n p p m o f f u l l - s c a l e r a n g e ( f s r ) p e r d e g r e e c e l s i u s . f o r r e f e r e n c e d r i f t , t h e d r i f t i s r e p o r t e d i n p p m p e r d e g r e e c e l s i u s . p o w e r s u p p l y r e j e c t i o n ( p s r ) p s r i s t h e m a x i m u m c h a n g e i n t h e f u l l - s c a l e o u t p u t a s t h e s u p p l i e s a r e v a r i e d f r o m m i n i m u m t o m a x i m u m s p e c i f i e d v o l t a g e s . s e t t l i n g t i m e s e t t l i n g t i m e i s t h e t i m e r e q u i r e d f o r t h e o u t p u t t o r e a c h a n d r e m a i n w i t h i n a s p e c i f i e d e r r o r b a n d a r o u n d i t s f i n a l v a l u e , m e a s u r e d f r o m t h e s t a r t o f t h e o u t p u t t r a n s i t i o n . s p u r i o u s - f r e e d y n a m i c r a n g e ( s f d r ) s f d r i s t h e d i f f e r e n c e , i n d e c i b e l s , b e t w e e n t h e p e a k a m p l i t u d e o f t h e o u t p u t s i g n a l a n d t h e p e a k s p u r i o u s s i g n a l w i t h i n t h e d c t o n y q u i s t f r e q u e n c y o f t h e d a c . t y p i c a l l y , t h e i n t e r p o l o a t i o n f i l t e r s r e j e c t e n e r g y i n t h i s b a n d . t h i s s p e c i f i c a t i o n , t h e r e f o r e , d e f i n e s h o w w e l l t h e i n t e r p o l a t i o n f i l t e r s w o r k a n d t h e e f f e c t o f o t h e r p a r a s i t i c c o u p l i n g p a t h s o n t h e d a c o u t p u t . s i g n a l - t o - n o i s e r a t i o ( s n r ) s n r i s t h e r a t i o o f t h e r m s v a l u e o f t h e m e a s u r e d o u t p u t s i g n a l t o t h e r m s s u m o f a l l o t h e r s p e c t r a l c o m p o n e n t s b e l o w t h e n y q u i s t f r e q u e n c y , e x c l u d i n g t h e f i r s t s i x h a r m o n i c s a n d d c . t h e v a l u e f o r s n r i s e x p r e s s e d i n d e c i b e l s . i n t e r p o l a t i o n f i l t e r i f t h e d i g i t a l i n p u t s t o t h e d a c a r e s a m p l e d a t a m u l t i p l e r a t e o f f d a t a ( i n t e r p o l a t i o n r a t e ) , a d i g i t a l f i l t e r c a n b e c o n s t r u c t e d t h a t h a s a s h a r p t r a n s i t i o n b a n d n e a r f d a t a / 2 . i m a g e s t h a t t y p i c a l l y a p p e a r a r o u n d f d a c ( o u t p u t d a t a r a t e ) c a n b e g r e a t l y s u p p r e s s e d . a d j a c e n t c h a n n e l l e a k a g e r a t i o ( a c l r ) a c l r i s t h e r a t i o i n d e c i b e l s r e l a t i v e t o t h e c a r r i e r ( d b c ) b e t w e e n t h e m e a s u r e d p o w e r w i t h i n a c h a n n e l r e l a t i v e t o i t s a d j a c e n t c h a n n e l . c o m p l e x i m a g e r e j e c t i o n i n a t r a d i t i o n a l t w o - p a r t u p c o n v e r s i o n , t w o i m a g e s a r e c r e a t e d a r o u n d t h e s e c o n d i f f r e q u e n c y . t h e s e i m a g e s h a v e t h e e f f e c t o f w a s t i n g t r a n s m i t t e r p o w e r a n d s y s t e m b a n d w i d t h . b y p l a c i n g t h e r e a l p a r t o f a s e c o n d c o m p l e x m o d u l a t o r i n s e r i e s w i t h t h e f i r s t c o m p l e x m o d u l a t o r , e i t h e r t h e u p p e r o r l o w e r f r e q u e n c y i m a g e n e a r t h e s e c o n d i f c a n b e r e j e c t e d . d a t a s h e e t a d 9 1 4 2 a r e v . 0 | p a g e 2 1 o f 7 2 s e r i a l p o r t o p e r a t i o n t h e s e r i a l p o r t i s a f l e x i b l e , s y n c h r o n o u s s e r i a l c o m m u n i c a t i o n s p o r t t h a t a l l o w s e a s y i n t e r f a c i n g t o m a n y i n d u s t r y s t a n d a r d m i c r o - c o n t r o l l e r s a n d m i c r o p r o c e s s o r s . t h e s e r i a l i / o i s c o m p a t i b l e w i t h m o s t s y n c h r o n o u s t r a n s f e r f o r m a t s , i n c l u d i n g b o t h t h e m o t o r o l a ? s p i a n d i n t e l ? s s r p r o t o c o l s . t h e i n t e r f a c e a l l o w s r e a d / w r i t e a c c e s s t o a l l r e g i s t e r s t h a t c o n f i g u r e t h e a d 9 1 4 2 a . m s b - f i r s t o r l s b - f i r s t t r a n s f e r f o r m a t s a r e s u p p o r t e d . t h e s e r i a l p o r t i n t e r f a c e i s a 3 - w i r e o n l y i n t e r f a c e . t h e i n p u t a n d o u t p u t s h a r e a s i n g l e p i n i n p u t / o u t p u t ( s d i o ) . f i g u r e 2 8 . s e r i a l p o r t i n t e r f a c e p i n s t h e r e a r e t w o p h a s e s t o a c o m m u n i c a t i o n c y c l e w i t h t h e a d 9 1 4 2 a . p h a s e 1 i s t h e i n s t r u c t i o n c y c l e ( t h e w r i t i n g o f a n i n s t r u c t i o n b y t e i n t o t h e d e v i c e ) , c o i n c i d e n t w i t h t h e f i r s t 1 6 s c l k r i s i n g e d g e s . t h e i n s t r u c t i o n w o r d p r o v i d e s t h e s e r i a l p o r t c o n t r o l l e r w i t h i n f o r m a t i o n r e g a r d i n g t h e d a t a t r a n s f e r c y c l e , p h a s e 2 , o f t h e c o m m u n i c a t i o n c y c l e . t h e p h a s e 1 i n s t r u c t i o n w o r d d e f i n e s w h e t h e r t h e u p c o m i n g d a t a t r a n s f e r i s a r e a d o r w r i t e , a l o n g w i t h t h e s t a r t i n g r e g i s t e r a d d r e s s f o r t h e n e x t d a t a t r a n s f e r i n t h e c y c l e . a l o g i c h i g h o n t h e c s p i n , f o l l o w e d b y a l o g i c l o w , r e s e t s t h e s e r i a l p o r t t i m i n g t o t h e i n i t i a l s t a t e o f t h e i n s t r u c t i o n c y c l e . f r o m t h i s s t a t e , t h e n e x t 1 6 r i s i n g s c l k e d g e s r e p r e s e n t t h e i n s t r u c t i o n b i t s o f t h e c u r r e n t i / o o p e r a t i o n . t h e r e m a i n i n g s c l k e d g e s a r e f o r p h a s e 2 o f t h e c o m m u n i c a t i o n c y c l e . p h a s e 2 i s t h e a c t u a l d a t a t r a n s f e r b e t w e e n t h e d e v i c e a n d t h e s y s t e m c o n t r o l l e r . p h a s e 2 o f t h e c o m m u n i c a t i o n c y c l e i s a t r a n s f e r o f o n e d a t a b y t e . r e g i s t e r s c h a n g e i m m e d i a t e l y u p o n w r i t i n g t o t h e l a s t b i t o f e a c h t r a n s f e r b y t e , e x c e p t f o r t h e f r e q u e n c y t u n i n g w o r d a n d n c o p h a s e o f f s e t s , w h i c h c h a n g e o n l y w h e n t h e f r e q u e n c y t u n i n g w o r d ( f t w ) u p d a t e b i t i s s e t . d a t a f o r m a t t h e i n s t r u c t i o n b y t e c o n t a i n s t h e i n f o r m a t i o n s h o w n i n t a b l e 1 0 . t a b l e 1 0 . s e r i a l p o r t i n s t r u c t i o n w o r d i 1 5 ( m s b ) i [ 1 4 : 0 ] r / w a [ 1 4 : 0 ] r / w ( b i t 1 5 o f t h e i n s t r u c t i o n w o r d ) d e t e r m i n e s w h e t h e r a r e a d o r a w r i t e d a t a t r a n s f e r o c c u r s a f t e r t h e i n s t r u c t i o n w o r d w r i t e . l o g i c 1 i n d i c a t e s a r e a d o p e r a t i o n a n d l o g i c 0 i n d i c a t e s a w r i t e o p e r a t i o n . a 1 4 t o a 0 ( b i t 1 4 t o b i t 0 o f t h e i n s t r u c t i o n w o r d ) d e t e r m i n e t h e r e g i s t e r t h a t i s a c c e s s e d d u r i n g t h e d a t a t r a n s f e r p o r t i o n o f t h e c o m m u n i c a t i o n c y c l e . f o r m u l t i b y t e t r a n s f e r s , a 1 4 i s t h e s t a r t i n g a d d r e s s ; t h e d e v i c e g e n e r a t e s t h e r e m a i n i n g r e g i s t e r a d d r e s s e s b a s e d o n t h e s p i _ l s b _ f i r s t b i t . s e r i a l p o r t p i n d e s c r i p t i o n s s e r i a l c l o c k ( s c l k ) t h e s e r i a l c l o c k p i n s y n c h r o n i z e s d a t a t o a n d f r o m t h e d e v i c e a n d r u n s t h e i n t e r n a l s t a t e m a c h i n e s . t h e m a x i m u m f r e q u e n c y o f s c l k i s 4 0 m h z . a l l d a t a i n p u t i s r e g i s t e r e d o n t h e r i s i n g e d g e o f s c l k . a l l d a t a i s d r i v e n o u t o n t h e f a l l i n g e d g e o f s c l k . c h i p s e l e c t ( c s ) c s i s a n a c t i v e l o w i n p u t t h a t s t a r t s a n d g a t e s a c o m m u n i c a t i o n c y c l e . i t a l l o w s m o r e t h a n o n e d e v i c e t o b e u s e d o n t h e s a m e s e r i a l c o m m u n i c a t i o n s l i n e . t h e s d i o p i n s e n t e r a h i g h i m p e d a n c e s t a t e w h e n t h e c s i n p u t i s h i g h . d u r i n g t h e c o m m u n i c a t i o n c y c l e , c s s h o u l d s t a y l o w . s e r i a l d a t a i / o ( s d i o ) t h e s d i o p i n i s a b i d i r e c t i o n a l d a t a l i n e . s e r i a l p o r t o p t i o n s t h e s e r i a l p o r t c a n s u p p o r t b o t h m s b - f i r s t a n d l s b - f i r s t d a t a f o r m a t s . t h i s f u n c t i o n a l i t y i s c o n t r o l l e d b y t h e s p i _ l s b _ f i r s t b i t ( r e g i s t e r 0 x 0 0 , b i t 6 ) . t h e d e f a u l t i s m s b f i r s t ( l s b _ f i r s t = 0 ) . w h e n s p i _ l s b _ f i r s t = 0 ( m s b f i r s t ) , t h e i n s t r u c t i o n a n d d a t a b i t s m u s t b e w r i t t e n f r o m m s b t o l s b . m u l t i b y t e d a t a t r a n s f e r s i n m s b - f i r s t f o r m a t s t a r t w i t h a n i n s t r u c t i o n w o r d t h a t i n c l u d e s t h e r e g i s t e r a d d r e s s o f t h e m o s t s i g n i f i c a n t d a t a b y t e . s u b s e q u e n t d a t a b y t e s m u s t f o l l o w f r o m h i g h a d d r e s s t o l o w a d d r e s s . i n m s b - f i r s t m o d e , t h e s e r i a l p o r t i n t e r n a l w o r d a d d r e s s g e n e r a t o r d e c r e m e n t s f o r e a c h d a t a b y t e o f t h e m u l t i b y t e c o m m u n i c a t i o n c y c l e . w h e n s p i _ l s b _ f i r s t = 1 ( l s b f i r s t ) , t h e i n s t r u c t i o n a n d d a t a b i t s m u s t b e w r i t t e n f r o m l s b t o m s b . m u l t i b y t e d a t a t r a n s f e r s i n l s b - f i r s t f o r m a t s t a r t w i t h a n i n s t r u c t i o n w o r d t h a t i n c l u d e s t h e r e g i s t e r a d d r e s s o f t h e l e a s t s i g n i f i c a n t d a t a b y t e . s u b s e q u e n t d a t a b y t e s m u s t f o l l o w f r o m l o w a d d r e s s t o h i g h a d d r e s s . i n l s b - f i r s t m o d e , t h e s e r i a l p o r t i n t e r n a l w o r d a d d r e s s g e n e r a t o r i n c r e m e n t s f o r e a c h d a t a b y t e o f t h e m u l t i b y t e c o m m u n i c a t i o n c y c l e . i f t h e m s b - f i r s t m o d e i s a c t i v e , t h e s e r i a l p o r t c o n t r o l l e r d a t a a d d r e s s d e c r e m e n t s f r o m t h e d a t a a d d r e s s w r i t t e n t o w a r d 0 x 0 0 f o r m u l t i b y t e i / o o p e r a t i o n s . i f t h e l s b - f i r s t m o d e i s a c t i v e , t h e s e r i a l p o r t c o n t r o l l e r d a t a a d d r e s s i n c r e m e n t s f r o m t h e d a t a a d d r e s s w r i t t e n t o w a r d 0 x f f f o r m u l t i b y t e i / o o p e r a t i o n s . 5 3 s c l k 5 4 c s 5 2 s d i o s p i p o r t 1 1 9 0 1 - 0 2 5 a d 9 1 4 2 a d a t a s h e e t r e v . 0 | p a g e 2 2 o f 7 2 f i g u r e 2 9 . s e r i a l r e g i s t e r i n t e r f a c e t i m i n g , m s b f i r s t f i g u r e 3 0 . s e r i a l r e g i s t e r i n t e r f a c e t i m i n g , l s b f i r s t f i g u r e 3 1 . t i m i n g d i a g r a m f o r s e r i a l p o r t r e g i s t e r w r i t e f i g u r e 3 2 . t i m i n g d i a g r a m f o r s e r i a l p o r t r e g i s t e r r e a d r / w a 1 4 a 1 3 a 3 a 2 a 1 a 0 d 7 n d 6 n d 5 n d 0 0 d 1 0 d 2 0 d 3 0 i n s t r u c t i o n c y c l e d a t a t r a n s f e r c y c l e s c l k s d i o c s 1 1 9 0 1 - 0 2 6 a 0 a 1 a 2 a 1 2 a 1 3 a 1 4 r / w d 0 0 d 1 0 d 2 0 d 7 n d 6 n d 5 n d 4 n i n s t r u c t i o n c y c l e d a t a t r a n s f e r c y c l e s c l k s d i o c s 1 1 9 0 1 - 0 2 7 s c l k s d i o c s i n s t r u c t i o n b i t 1 4 i n s t r u c t i o n b i t 1 5 t d c s b t d s t d h t p w h t p w l t s c l k 1 1 9 0 1 - 0 2 8 s c l k s d i o c s d a t a b i t n ? 1 d a t a b i t n t d v 1 1 9 0 1 - 0 2 9 d a t a s h e e t a d 9 1 4 2 a r e v . 0 | p a g e 2 3 o f 7 2 d a t a i n t e r f a c e l v d s i n p u t d a t a p o r t s t h e a d 9 1 4 2 a h a s a 1 6 - b i t l v d s b u s t h a t a c c e p t s 1 6 - b i t i a n d q d a t a e i t h e r i n w o r d ( 1 6 - b i t ) o r b y t e ( 8 - b i t ) f o r m a t s . i n t h e w o r d i n t e r f a c e m o d e , t h e d a t a i s s e n t o v e r t h e e n t i r e 1 6 - b i t d a t a b u s . i n t h e b y t e i n t e r f a c e m o d e , t h e d a t a i s s e n t o v e r t h e l o w e r 8 - b i t ( d 7 t o d 0 ) l v d s b u s . t a b l e 1 1 l i s t s t h e p i n a s s i g n m e n t o f t h e b u s a n d t h e s p i r e g i s t e r c o n f i g u r a t i o n f o r e a c h m o d e . t a b l e 1 1 . l v d s i n p u t d a t a m o d e s i n t e r f a c e m o d e p i n a s s i g n m e n t s p i r e g i s t e r c o n f i g u r a t i o n w o r d d 1 5 t o d 0 r e g i s t e r 0 x 2 6 , b i t 0 = 0 b y t e d 7 t o d 0 r e g i s t e r 0 x 2 6 , b i t 0 = 1 w o r d i n t e r f a c e m o d e i n w o r d i n t e r f a c e m o d e , t h e d i g i t a l c l o c k i n p u t ( d c i ) s i g n a l i s a r e f e r e n c e b i t t h a t g e n e r a t e s a d o u b l e d a t a r a t e ( d d r ) d a t a s a m p l i n g c l o c k . t i m e a l i g n t h e d c i s i g n a l w i t h t h e d a t a . t h e i d a c d a t a f o l l o w s t h e r i s i n g e d g e o f t h e d c i , a n d t h e q d a c d a t a f o l l o w s t h e f a l l i n g e d g e o f t h e d c i , a s s h o w n i n f i g u r e 3 3 . f i g u r e 3 3 . t i m i n g d i a g r a m f o r w o r d i n t e r f a c e m o d e b y t e i n t e r f a c e m o d e i n b y t e i n t e r f a c e m o d e , t h e r e q u i r e d s e q u e n c e o f t h e i n p u t d a t a s t r e a m i s i [ 1 5 : 8 ] , i [ 7 : 0 ] , q [ 1 5 : 8 ] , q [ 7 : 0 ] . a f r a m e s i g n a l i s r e q u i r e d t o a l i g n t h e o r d e r o f i n p u t d a t a b y t e s p r o p e r l y . t i m e a l i g n b o t h t h e d c i s i g n a l a n d f r a m e s i g n a l w i t h t h e d a t a . t h e r i s i n g e d g e o f t h e f r a m e i n d i c a t e s t h e s t a r t o f t h e s e q u e n c e . t h e f r a m e c a n b e e i t h e r a o n e s h o t o r p e r i o d i c a l s i g n a l a s l o n g a s i t s f i r s t r i s i n g e d g e i s c o r r e c t l y c a p t u r e d b y t h e d e v i c e . f o r a o n e s h o t f r a m e , t h e f r a m e p u l s e m u s t b e h e l d a t h i g h f o r a t l e a s t o n e d c i c y c l e . f o r a p e r i o d i c a l f r a m e , t h e f r e q u e n c y n e e d s t o b e f d c i / ( 2 n ) w h e r e n i s a p o s i t i v e i n t e g e r , t h a t i s , 1 , 2 , 3 , ? f i g u r e 3 4 i s a n e x a m p l e o f s i g n a l t i m i n g i n b y t e m o d e . f i g u r e 3 4 . t i m i n g d i a g r a m f o r b y t e i n t e r f a c e m o d e d a t a i n t e r f a c e c o n f i g u r a t i o n o p t i o n s t o p r o v i d e m o r e f l e x i b i l i t y f o r t h e d a t a i n t e r f a c e , s o m e a d d i t i o n a l o p t i o n s a r e l i s t e d i n t a b l e 1 2 . t a b l e 1 2 . d a t a i n t e r f a c e c o n f i g u r a t i o n o p t i o n s r e g i s t e r 0 x 2 6 d e s c r i p t i o n d a t a _ f o r m a t ( b i t 7 ) s e l e c t b e t w e e n b i n a r y a n d t w o s c o m p l e m e n t f o r m a t s . d a t a _ p a i r i n g ( b i t 6 ) i n d i c a t e i / q d a t a p a i r i n g o n d a t a i n p u t . t h i s a l l o w s t h e i a n d q d a t a t h a t i s r e c e i v e d t o b e p a i r e d i n v a r i o u s w a y s . d a t a _ b u s _ i n v e r t ( b i t 5 ) s w a p s t h e b i t o r d e r o f t h e d a t a i n p u t p o r t . r e m a p s t h e i n p u t d a t a f r o m d [ 1 5 : 0 ] t o d [ 0 : 1 5 ] . d l l i n t e r f a c e m o d e a s o u r c e s y n c h r o n o u s l v d s i n t e r f a c e i s u s e d b e t w e e n t h e d a t a h o s t a n d a d 9 1 4 2 a t o a c h i e v e h i g h d a t a r a t e s w h i l e s i m p l i f y i n g t h e i n t e r f a c e . t h e f p g a o r a s i c f e e d s t h e a d 9 1 4 2 a w i t h 1 6 - b i t i n p u t d a t a . a l o n g w i t h t h e i n p u t d a t a , t h e f p g a o r a s i c p r o v i d e s a d d r ( d o u b l e d a t a r a t e ) d a t a c l o c k i n p u t ( d c i ) . a d e l a y l o c k e d l o o p ( d l l ) c i r c u i t d e s i g n e d t o o p e r a t e w i t h d c i c l o c k r a t e s b e t w e e n 2 5 0 a n d 5 7 5 m h z i s u s e d t o g e n e r a t e a p h a s e - s h i f t e d v e r s i o n o f t h e d c i , c a l l e d d s c ( d a t a s a m p l i n g c l o c k ) , t o r e g i s t e r t h e i n p u t d a t a o n b o t h t h e r i s i n g a n d f a l l i n g e d g e s . a s s h o w n i n f i g u r e 3 5 , t h e d c i c l o c k e d g e s m u s t b e c o i n c i d e n t w i t h t h e d a t a b i t t r a n s i t i o n s w i t h m i n i m u m s k e w a n d j i t t e r . t h e n o m i n a l s a m p l i n g p o i n t o f t h e i n p u t d a t a o c c u r s i n t h e m i d d l e o f t h e d c i c l o c k e d g e s b e c a u s e t h i s p o i n t c o r r e s p o n d s t o t h e c e n t e r o f t h e d a t a e y e . t h i s i s a l s o e q u i v a l e n t t o a n o m i n a l p h a s e s h i f t o f 9 0 o f t h e d c i c l o c k . t h e d a t a t i m i n g r e q u i r e m e n t s a r e d e f i n e d b y a d a t a v a l i d w i n d o w ( d v w ) t h a t i s d e p e n d e n t o n t h e d a t a c l o c k i n p u t s k e w , i n p u t d a t a j i t t e r , a n d t h e v a r i a t i o n s o f t h e d l l d e l a y l i n e a c r o s s d e l a y s e t t i n g s . t h e d v w i s d e f i n e d a s d v w = t d a t a p e r i o d t d a t a s k e w ? t d a t a j i t t e r t h e a v a i l a b l e m a r g i n f o r d a t a i n t e r f a c e t i m i n g i s g i v e n b y t m a r g i n = d v w ( t s + t h ) t h e d i f f e r e n c e b e t w e e n t h e s e t u p a n d h o l d t i m e s , w h i c h i s a l s o c a l l e d t h e k e e p o u t w i n d o w , o r k o w , i s t h e a r e a w h e r e d a t a t r a n s i t i o n s s h o u l d n o t h a p p e n . t h e t i m i n g m a r g i n a l l o w s t u n i n g o f t h e d l l d e l a y s e t t i n g b y t h e u s e r , s e e f i g u r e 3 6 . f r o m t h e f i g u r e , i t c a n b e s e e n t h a t t h e i d e a l l o c a t i o n f o r t h e d s c s i g n a l i s 9 0 o u t o f p h a s e f r o m t h e d c i i n p u t . h o w e v e r , d u e t o s k e w o f t h e d c i r e l a t i v e t o t h e d a t a , i t m a y b e n e c e s s a r y t o c h a n g e t h e d s c p h a s e o f f s e t t o s a m p l e t h e d a t a a t t h e c e n t e r o f i t s e y e d i a g r a m . t h e s a m p l i n g i n s t a n c e c a n b e v a r i e d i n d i s c r e t e i n c r e m e n t s b y o f f s e t t i n g t h e n o m i n a l d l l p h a s e s h i f t v a l u e o f 9 0 v i a r e g i s t e r 0 x 0 a , b i t s [ 3 : 0 ] . t h i s r e g i s t e r i s a s i g n e d v a l u e . t h e m s b i s t h e s i g n a n d t h e l s b s a r e t h e m a g n i t u d e . t h e f o l l o w i n g e q u a t i o n d e f i n e s t h e p h a s e o f f s e t r e l a t i o n s h i p : p h a s e o f f s e t = 9 0 n 1 1 . 2 5 , | n | < 7 w h e r e n i s t h e d l l p h a s e o f f s e t s e t t i n g . i 0 q 0 i 1 q 1 w o r d i n t e r f a c e m o d e d c i i n p u t d a t a [ 1 5 : 0 ] 1 1 9 0 1 - 0 3 0 i 0 [ 1 5 : 8 ] i 0 [ 7 : 0 ] q 0 [ 1 5 : 8 ] q 0 [ 7 : 0 ] b y t e i n t e r f a c e m o d e d c i f r a m e i n p u t d a t a [ 7 : 0 ] 1 1 9 0 1 - 0 3 1 a d 9 1 4 2 a d a t a s h e e t r e v . 0 | p a g e 2 4 o f 7 2 f i g u r e 3 5 s h o w s t h e d s c s e t u p a n d h o l d t i m e s w i t h r e s p e c t t o t h e d c i s i g n a l a n d d a t a s i g n a l s . f i g u r e 3 5 . l v d s d a t a p o r t s e t u p a n d h o l d t i m e s t a b l e 1 3 l i s t s t h e v a l u e s t h a t a r e g u a r a n t e e d o v e r t h e o p e r a t i n g c o n d i t i o n s . t h e s e v a l u e s w e r e t a k e n w i t h a 5 0 % d u t y c y c l e a n d a d c i s w i n g o f 4 5 0 m v p - p . f o r b e s t p e r f o r m a n c e , t h e d u t y c y c l e v a r i a t i o n s h o u l d b e k e p t b e l o w 5 % , a n d t h e d c i i n p u t s h o u l d b e a s h i g h a s p o s s i b l e , u p t o 1 2 0 0 m v p - p . t a b l e 1 3 . d l l p h a s e s e t u p a n d h o l d t i m e s ( g u a r a n t e e d ) f r e q u e n c y , f d c i ( m h z ) t i m e ( p s ) d a t a p o r t s e t u p a n d h o l d t i m e s ( p s ) a t d l l p h a s e ? 3 0 + 3 3 0 7 t s ? 1 2 5 ? 3 8 5 ? 6 9 5 t h 8 3 4 1 1 2 0 1 4 1 7 3 6 8 t s ? 7 0 ? 3 0 5 ? 5 3 4 t h 7 5 3 9 6 7 1 2 0 7 4 9 1 t s ? 8 1 ? 2 4 5 ? 4 0 2 t h 6 0 1 7 6 2 9 2 8 f i g u r e 3 6 . l v d s d a t a p o r t t i m i n g r e q u i r e m e n t s d c i d a t a d s c t s t h 1 1 9 0 1 - 1 3 5 i n p u t d a t a d c i d a t a e y e t s d a t a s a m p l e c l o c k i n p u t d a t a d c i d a t a s a m p l e c l o c k d a t a e y e d l l p h a s e d e l a y t d a t a j i t t e r t h t d a t a j i t t e r t h a n d t s t d c i s k e w t d a t a p e r i o d t d a t a p e r i o d 1 1 9 0 1 - 0 3 7 d a t a s h e e t a d 9 1 4 2 a r e v . 0 | p a g e 2 5 o f 7 2 t a b l e 1 4 . d l l p h a s e s e t u p a n d h o l d t i m e s ( t y p i c a l ) f r e q u e n c y , f d c i 1 ( m h z ) t i m e ( p s ) d a t a p o r t s e t u p a n d h o l d t i m e s ( p s ) a t d l l p h a s e 6 5 4 3 2 1 0 + 1 + 2 + 3 + 4 + 5 + 6 2 5 0 t s 9 3 1 9 6 3 1 2 4 1 6 5 3 0 6 5 8 7 7 0 8 7 8 9 8 3 1 0 9 3 1 1 9 3 1 2 8 9 1 4 1 2 t h 4 6 8 5 7 9 7 0 7 8 2 5 9 4 7 1 0 6 7 1 1 8 8 1 3 1 5 1 4 4 2 1 5 7 0 1 6 9 7 1 7 7 7 1 8 7 6 2 7 5 t s 8 7 1 7 2 2 6 4 3 6 4 4 6 4 5 5 6 6 5 3 7 5 6 8 5 9 9 5 6 1 0 5 3 1 1 5 1 1 2 5 1 t h 4 5 1 5 3 7 6 4 6 7 5 7 8 7 8 9 7 7 1 0 9 2 1 2 1 8 1 3 1 1 1 4 2 3 1 5 3 7 1 6 5 3 1 7 2 8 3 0 0 t s 8 2 1 6 6 2 5 6 3 4 1 4 2 6 5 1 5 6 2 2 7 1 5 8 0 9 9 0 0 1 0 0 1 1 0 9 7 1 1 8 4 t h 4 2 2 5 0 0 5 9 8 7 0 3 8 0 3 8 9 7 1 0 0 0 1 1 0 5 1 2 0 3 1 3 0 3 1 4 1 1 1 5 2 2 1 6 1 2 3 2 5 t s 4 6 1 1 4 1 9 0 2 7 1 3 5 8 4 4 7 5 3 8 6 1 2 7 0 6 8 0 6 8 9 1 9 6 6 1 0 4 4 t h 4 0 5 4 8 3 5 6 3 6 4 7 7 4 0 8 3 2 9 1 4 1 0 0 0 1 1 0 0 1 2 0 0 1 2 9 2 1 3 8 0 1 4 7 6 3 5 0 t s 2 3 9 2 1 8 0 2 5 2 3 2 8 4 0 9 4 9 1 5 7 4 6 5 4 7 3 1 8 1 9 8 8 9 9 5 9 t h 3 8 3 4 5 1 5 2 4 6 0 7 6 8 2 7 6 2 8 4 4 9 3 0 1 0 1 1 1 0 9 7 1 1 8 6 1 2 7 7 1 3 5 8 3 7 5 t s 7 8 2 1 5 0 2 2 5 3 1 5 3 9 1 4 6 1 5 2 6 5 9 5 6 6 1 7 2 6 7 8 6 8 5 3 t h 4 0 1 4 6 6 5 0 4 5 6 9 6 4 1 7 1 8 7 8 3 8 6 3 9 4 1 1 0 2 5 1 1 0 6 1 1 8 7 1 2 6 4 4 0 0 t s 4 6 9 8 1 6 1 2 4 3 3 0 3 3 8 4 4 4 8 5 1 3 5 7 8 6 4 3 7 1 3 7 7 1 8 3 3 t h 3 8 5 4 4 5 5 0 3 5 4 6 6 0 4 6 7 4 7 4 8 8 2 6 8 9 0 9 6 5 1 0 3 9 1 1 1 0 1 1 7 8 4 2 5 t s 4 5 2 1 1 0 1 7 0 2 2 9 2 9 7 3 9 4 4 4 9 5 1 7 5 7 9 6 4 1 7 0 4 7 5 2 t h 3 5 8 4 0 8 4 6 5 5 2 4 5 9 5 6 2 5 6 9 2 7 6 2 8 2 9 9 0 0 9 6 6 1 0 3 2 1 0 9 7 4 5 0 t s 1 1 3 4 9 2 1 4 7 2 0 9 2 6 9 3 2 4 3 8 6 4 4 6 5 0 9 5 6 4 6 2 2 6 7 2 t h 3 5 4 4 0 6 4 5 7 5 1 6 5 7 3 6 3 7 6 9 3 7 3 1 7 9 2 8 5 2 9 1 7 9 8 3 1 0 4 2 4 7 5 t s 1 5 5 1 9 5 1 4 7 1 9 8 2 5 5 3 1 3 3 6 6 4 2 5 4 8 0 5 3 0 5 8 5 6 4 0 t h 3 5 5 3 9 9 4 5 1 4 9 9 5 5 6 6 1 3 6 7 5 7 2 7 7 7 9 8 1 5 8 7 3 9 3 0 9 8 8 5 0 0 t s 9 2 8 7 7 1 2 8 1 8 3 2 3 3 2 8 8 3 3 3 3 9 0 4 3 8 4 9 5 5 4 5 5 9 4 t h 3 1 3 3 5 4 3 9 9 4 4 5 5 0 0 5 5 5 6 1 5 6 6 8 7 2 6 7 8 3 8 2 5 8 8 1 9 3 4 5 2 5 t s 7 5 2 1 0 0 1 4 7 1 8 7 2 3 7 2 8 5 3 3 5 3 8 7 4 3 6 4 8 3 5 3 0 5 8 1 t h 3 1 1 3 5 6 3 9 5 4 3 8 4 8 9 5 3 7 5 9 2 6 4 5 6 9 2 7 4 6 7 9 9 8 5 0 9 0 9 5 5 0 t s 5 3 9 7 4 1 0 7 1 4 7 1 9 2 2 4 9 3 0 2 3 5 2 3 9 7 4 4 0 4 8 6 5 2 9 t h 3 0 0 3 4 0 3 7 8 4 2 3 4 6 8 5 1 0 5 6 0 6 1 0 6 5 9 7 1 0 7 5 6 8 1 0 8 6 5 5 7 5 t s 8 2 8 6 6 1 0 2 1 4 3 1 8 1 2 4 5 2 8 0 3 3 6 3 6 6 4 0 6 4 4 3 4 8 8 t h 3 1 2 3 4 8 3 7 9 4 1 4 4 5 3 4 9 6 5 4 4 5 9 9 6 5 4 7 0 8 7 5 9 8 0 6 8 4 7 1 t a b l e 1 4 s h o w s c h a r a c t e r i z a t i o n d a t a f o r s e l e c t e d f d c i f r e q u e n c i e s . o t h e r f r e q u e n c i e s a r e p o s s i b l e , a n d t a b l e 1 4 c a n b e u s e d t o e s t i m a t e p e r f o r m a n c e . t a b l e 1 4 s h o w s t h e t y p i c a l t i m e s f o r v a r i o u s d c i c l o c k f r e q u e n c i e s t h a t a r e r e q u i r e d t o c a l c u l a t e t h e d a t a v a l i d m a r g i n . t h e a m o u n t o f m a r g i n t h a t i s a v a i l a b l e f o r t u n i n g o f t h e d s c s a m p l i n g p o i n t c a n b e d e t e r m i n e d u s i n g t a b l e 1 4 . m a x i m i z i n g t h e o p e n i n g o f t h e e y e i n b o t h t h e d c i a n d d a t a s i g n a l s i m p r o v e s t h e r e l i a b i l i t y o f t h e d a t a p o r t i n t e r f a c e . d i f f e r e n t i a l c o n t r o l l e d i m p e d a n c e t r a c e s o f e q u a l l e n g t h ( t h a t i s , d e l a y ) s h o u l d b e u s e d b e t w e e n t h e h o s t p r o c e s s o r a n d t h e a d 9 1 4 2 a i n p u t . t o e n s u r e c o i n c i d e n t t r a n s i t i o n s w i t h t h e d a t a b i t s , t h e d c i s i g n a l s h o u l d b e i m p l e m e n t e d a s a n a d d i t i o n a l d a t a l i n e w i t h a n a l t e r n a t i n g ( 0 1 0 1 0 1 ? ) b i t s e q u e n c e f r o m t h e s a m e o u t p u t d r i v e r s u s e d f o r t h e d a t a . t h e d c i s i g n a l i s a c - c o u p l e d b y d e f a u l t ; t h u s , r e m o v i n g t h e d c i s i g n a l m a y c a u s e d a c o u t p u t c h a t t e r d u e t o r a n d o m n e s s o n t h e d c i i n p u t . t o a v o i d t h i s , i t i s r e c o m m e n d e d t h a t t h e d a c o u t p u t i s d i s a b l e d w h e n e v e r t h e d c i s i g n a l i s n o t p r e s e n t . t o d o t h i s , p r o g r a m t h e d a c o u t p u t c u r r e n t p o w e r d o w n b i t i n r e g i s t e r 0 x 0 1 , b i t 7 a n d b i t 6 t o 1 . w h e n t h e d c i s i g n a l i s a g a i n p r e s e n t , t h e d a c o u t p u t c a n b e e n a b l e d b y s e t t i n g r e g i s t e r 0 x 0 1 , b i t 7 a n d b i t 6 t o 0 . r e g i s t e r 0 x 0 d o p t i m i z e s t h e d l l s t a b i l i t y o v e r t h e o p e r a t i n g f r e q u e n c y r a n g e . t a b l e 1 5 s h o w s t h e r e c o m m e n d e d s e t t i n g . t a b l e 1 5 . d l l c o n f i g u r a t i o n o p t i o n s d c i s p e e d r e g i s t e r 0 x 0 d 3 5 0 m h z 0 x 0 6 < 3 5 0 m h z 0 x 8 6 t h e s t a t u s o f t h e d l l c a n b e p o l l e d b y r e a d i n g t h e d a t a s t a t u s r e g i s t e r a t a d d r e s s 0 x 0 e . b i t 0 i n d i c a t e s t h a t t h e d l l i s r u n n i n g a n d a t t e m p t i n g l o c k , a n d b i t 7 i s s e t t o w h e n t h e d l l h a s l o c k e d . b i t 2 i s 1 w h e n a v a l i d d a t a c l o c k i n i s d e t e c t e d . t h e w a r n i n g b i t s i n r e g i s t e r 0 x 0 e [ 6 : 4 ] c a n b e u s e d a s i n d i c a t o r s t h a t t h e d a c m a y b e o p e r a t i n g i n a n o n i d e a l l o c a t i o n i n t h e d e l a y l i n e . n o t e t h a t t h e s e b i t s a r e r e a d a t t h e s p i p o r t s p e e d , w h i c h i s m u c h s l o w e r t h a n t h e a c t u a l s p e e d o f t h e d l l . t h i s m e a n s t h e y c a n o n l y s h o w a s n a p s h o t o f w h a t i s h a p p e n i n g a s o p p o s e d t o g i v i n g r e a l - t i m e f e e d b a c k . a d 9 1 4 2 a d a t a s h e e t r e v . 0 | p a g e 2 6 o f 7 2 d l l c o n f i g u r a t i o n e x a m p l e 1 i n t h e f o l l o w i n g d l l c o n f i g u r a t i o n e x a m p l e , f d c i = 5 0 0 m h z , d l l i s e n a b l e d , a n d d l l p h a s e o f f s e t = 0 . 1 . 0 x 5 e : 0 x f e / * t u r n o f f l s b d e l a y c e l l * / 2 . 0 x 0 d : 0 x 0 6 / * s e l e c t d l l c o n f i g u r e o p t i o n s * / 3 . 0 x 0 a : 0 x c 0 / * e n a b l e d l l a n d d u t y c y c l e c o r r e c t i o n . s e t d l l p h a s e o f f s e t t o 0 * / 4 . r e a d 0 x 0 e [ 7 : 4 ] / * e x p e c t 1 0 0 0 b i f t h e d l l i s l o c k e d * / d l l c o n f i g u r a t i o n e x a m p l e 2 i n t h e f o l l o w i n g d l l c o n f i g u r a t i o n e x a m p l e , f d c i = 3 0 0 m h z , d l l i s e n a b l e , a n d d l l p h a s e o f f s e t = 0 . 1 . 0 x 5 e : 0 x f e / * t u r n o f f l s b d e l a y c e l l * / 2 . 0 x 0 d : 0 x 8 6 / * s e l e c t d l l c o n f i g u r e o p t i o n s * / 3 . 0 x 0 a : 0 x c 0 / * e n a b l e d l l a n d d u t y c y c l e c o r r e c t i o n . s e t d l l p h a s e o f f s e t t o 0 * / 4 . r e a d 0 x 0 e [ 7 : 4 ] / * e x p e c t 1 0 0 0 b i f t h e d l l i s l o c k e d * / p a r i t y t h e d a t a i n t e r f a c e c a n b e c o n t i n u o u s l y m o n i t o r e d b y e n a b l i n g t h e p a r i t y b i t f e a t u r e i n r e g i s t e r 0 x 6 a , b i t 7 a n d c o n f i g u r i n g t h e f r a m e / p a r i t y b i t a s p a r i t y b y s e t t i n g r e g i s t e r 0 x 0 9 t o 0 x 2 1 . i n t h i s c a s e , t h e h o s t s e n d s a p a r i t y b i t a l o n g w i t h e a c h d a t a s a m p l e . t h i s b i t i s s e t a c c o r d i n g t o t h e f o l l o w i n g f o r m u l a s , w h e r e n i s t h e d a t a s a m p l e t h a t i s b e i n g c h e c k e d . f o r e v e n p a r i t y , x o r [ f r m ( n ) , d 0 ( n ) , d 1 ( n ) , d 2 ( n ) , . . . , d 1 5 ( n ) ] = 0 f o r o d d p a r i t y , x o r [ f r m ( n ) , d 0 ( n ) , d 1 ( n ) , d 2 ( n ) , . . . , d 1 5 ( n ) ] = 1 t h e p a r i t y b i t i s c a l c u l a t e d o v e r 1 7 b i t s ( i n c l u d i n g t h e f r a m e / p a r i t y b i t ) . i f a p a r i t y e r r o r o c c u r s , t h e p a r i t y e r r o r c o u n t e r ( r e g i s t e r 0 x 6 b o r r e g i s t e r 0 x 6 c ) i s i n c r e m e n t e d . p a r i t y e r r o r s o n t h e b i t s s a m p l e d b y t h e r i s i n g e d g e o f d c i i n c r e m e n t s t h e r i s i n g e d g e p a r i t y c o u n t e r ( r e g i s t e r 0 x 6 b ) a n d s e t t h e p a r e r r r i s b i t ( r e g i s t e r 0 x 6 a , b i t 0 ) . p a r i t y e r r o r s o n t h e b i t s s a m p l e d b y t h e f a l l i n g e d g e o f d c i w i l l i n c r e m e n t t h e f a l l i n g e d g e p a r i t y c o u n t e r ( r e g i s t e r 0 x 6 c ) a n d s e t t h e p a r e r r f a l b i t ( r e g i s t e r 0 x 6 a , b i t 1 ) . t h e p a r i t y c o u n t e r c o n t i n u e s t o a c c u m u l a t e u n t i l i t i s c l e a r e d o r u n t i l i t r e a c h e s a m a x i m u m v a l u e o f 2 5 5 . t h e c o u n t c a n b e c l e a r e d b y w r i t i n g a 1 t o r e g i s t e r 0 x 6 a , b i t 5 . t o t r i g g e r a n i r q w h e n a p a r i t y e r r o r o c c u r s , w r i t e a 1 t o r e g i s t e r 0 x 0 4 , b i t 7 . t h i s i r q t r i g g e r s i f t h e r e i s e i t h e r a r i s i n g e d g e o r f a l l i n g e d g e p a r i t y e r r o r . t h e s t a t u s o f t h e i r q c a n b e o b s e r v e d v i a r e g i s t e r 0 x 0 6 , b i t 7 o r b y u s i n g t h e s e l e c t e d i r q x p i n . c l e a r t h e i r q b y w r i t i n g a 1 t o r e g i s t e r 0 x 0 6 , b i t 7 . u s e t h e p a r i t y b i t t o v a l i d a t e t h e i n t e r f a c e t i m i n g . a s d e s c r i b e d p r e v i o u s l y , t h e h o s t p r o v i d e s a p a r i t y b i t w i t h t h e d a t a s a m p l e s , a s w e l l a s c o n f i g u r e s t h e a d 9 1 4 2 a t o g e n e r a t e a n i r q . t h e u s e r c a n t h e n s w e e p t h e s a m p l i n g i n s t a n c e o f t h e a d 9 1 4 2 a i n p u t r e g i s t e r s t o d e t e r m i n e a t w h a t p o i n t a s a m p l i n g e r r o r o c c u r s . t h e s a m p l i n g i n s t a n c e c a n b e v a r i e d i n d i s c r e t e i n c r e m e n t s b y o f f s e t t i n g t h e n o m i n a l d l l p h a s e s h i f t v a l u e o f 9 0 v i a r e g i s t e r 0 x 0 a [ 3 : 0 ] . s e d o p e r a t i o n t h e a d 9 1 4 2 a p r o v i d e s o n - c h i p s a m p l e e r r o r d e t e c t i o n ( s e d ) c i r c u i t r y t h a t s i m p l i f i e s v e r i f i c a t i o n o f t h e i n p u t d a t a i n t e r f a c e . t h e s e d c o m p a r e s t h e i n p u t d a t a s a m p l e s c a p t u r e d a t t h e d i g i t a l i n p u t p i n s w i t h a s e t o f c o m p a r i s o n v a l u e s . t h e c o m p a r i s o n v a l u e s a r e l o a d e d i n t o r e g i s t e r s t h r o u g h t h e s p i p o r t . d i f f e r e n c e s b e t w e e n t h e c a p t u r e d v a l u e s a n d t h e c o m p a r i s o n v a l u e s a r e d e t e c t e d . o p t i o n s a r e a v a i l a b l e f o r c u s t o m i z i n g s e d t e s t s e q u e n c i n g a n d e r r o r h a n d l i n g . t h e s e d c i r c u i t r y a l l o w s t h e a p p l i c a t i o n t o t e s t a s h o r t u s e r d e f i n e d p a t t e r n t o c o n f i r m t h a t t h e h i g h s p e e d s o u r c e s y n c h r o n o u s d a t a b u s i s c o r r e c t l y i m p l e m e n t e d a n d m e e t s t h e t i m i n g r e q u i r e m e n t . u n l i k e t h e p a r i t y b i t , t h e s e d c i r c u i t r y i s e x p e c t e d t o b e u s e d d u r i n g i n i t i a l s y s t e m c a l i b r a t i o n , b e f o r e t h e a d 9 1 4 2 a i s i n u s e i n t h e a p p l i c a t i o n . t h e s e d c i r c u i t r y o p e r a t e s o n a d a t a s e t m a d e u p o f u s e r d e f i n e d i n p u t w o r d s , d e n o t e d a s i 0 , q 0 , i 1 , a n d q 1 . t h e u s e r d e f i n e d p a t t e r n c o n s i s t s o f s e q u e n t i a l d a t a w o r d s a m p l e s ( i 0 i s s a m p l e d o n t h e r i s i n g e d g e o f d c i , q 0 i s s a m p l e d o n t h e f o l l o w i n g f a l l i n g e d g e o f d c i , i 1 i s s a m p l e d o n t h e f o l l o w i n g d c i r i s i n g e d g e , a n d q 1 i s s a m p l e d o n t h e f o l l o w i n g d c i f a l l i n g e d g e ) . t h e u s e r l o a d s t h i s d a t a p a t t e r n i n t h e b y t e f o r m a t i n t o r e g i s t e r 0 x 6 1 t h r o u g h r e g i s t e r 0 x 6 8 . t h e d e p t h o f t h e u s e r d e f i n e d p a t t e r n i s s e l e c t a b l e v i a b i t 4 i n t h e s e d _ c t r l r e g i s t e r ( 0 x 6 0 ) , w i t h t h e d e f a u l t , 0 , m e a n i n g a d e p t h o f t w o ( u s i n g i 0 a n d q 0 ) , a n d a 1 m e a n i n g a d e p t h o f f o u r ( u s i n g i 0 , q 0 , i 1 , a n d q 1 , a n d r e q u i r i n g t h e u s e o f f r a m e s i g n a l i n p u t t o d e f i n e i 0 t o t h e s e d s t a t e m a c h i n e ) . t o p r o p e r l y a l i g n t h e i n p u t s a m p l e s u s i n g a d e p t h o f f o u r , i 0 i s i n d i c a t e d b y a s s e r t i n g t h e f r a m e s i g n a l f o r a m i n i m u m o f t w o c o m p l e t e i n p u t s a m p l e s a s s h o w n i n f i g u r e 3 7 . t h e f r a m e s i g n a l c a n b e i s s u e d o n c e a t t h e s t a r t o f t h e d a t a t r a n s m i s s i o n , o r i t c a n b e a s s e r t e d r e p e a t e d l y a t i n t e r v a l s c o i n c i d i n g w i t h t h e s 0 w o r d . f i g u r e 3 7 . t i m i n g d i a g r a m o f e x t e n d e d f r a m e s i g n a l r e q u i r e d t o a l i g n i n p u t d a t a f o r s e d t h e s e d h a s t h r e e f l a g b i t s ( r e g i s t e r 0 x 6 0 , b i t 0 , b i t 1 , a n d b i t 2 ) t h a t i n d i c a t e t h e r e s u l t s o f t h e i n p u t s a m p l e c o m p a r i s o n s . t h e s a m p l e e r r o r d e t e c t e d b i t ( r e g i s t e r 0 x 6 0 , b i t 0 ) i s s e t w h e n a n e r r o r i s d e t e c t e d a n d r e m a i n s s e t u n t i l c l e a r e d . i 0 q 0 i 1 q 1 i 0 f r a m e d a t a [ 1 5 : 0 ] 1 1 9 0 1 - 1 3 7 d a t a s h e e t a d 9 1 4 2 a r e v . 0 | p a g e 2 7 o f 7 2 t h e a u t o s a m p l e e r r o r d e t e c t i o n ( a e d ) m o d e i s a n a u t o c l e a r m o d e t h a t h a s t w o e f f e c t s : i t a c t i v a t e s t h e c o m p a r e f a i l b i t a n d t h e c o m p a r e p a s s b i t ( r e g i s t e r 0 x 6 0 , b i t 1 a n d b i t 2 ) . t h e c o m p a r e p a s s b i t s e t s i f t h e l a s t c o m p a r i s o n i n d i c a t e d t h a t t h e s a m p l e w a s e r r o r f r e e . t h e c o m p a r e f a i l b i t s e t s i f a n e r r o r i s d e t e c t e d . t h e c o m p a r e f a i l b i t i s a u t o m a t i c a l l y c l e a r e d b y t h e r e c e p t i o n o f e i g h t c o n s e c u t i v e e r r o r - f r e e c o m p a r i s o n s , w h e n a u t o c l e a r m o d e i s e n a b l e d . t h e s a m p l e e r r o r f l a g c a n b e c o n f i g u r e d t o t r i g g e r a n i r q w h e n a c t i v e , i f n e e d e d . t h i s i s d o n e b y e n a b l i n g t h e a p p r o p r i a t e b i t i n t h e e v e n t f l a g r e g i s t e r ( r e g i s t e r 4 , b i t 6 ) . s e d e x a m p l e n o r m a l o p e r a t i o n t h e f o l l o w i n g e x a m p l e i l l u s t r a t e s t h e a d 9 1 4 2 a s e d c o n f i g u r a t i o n s e q u e n c e f o r c o n t i n u o u s l y m o n i t o r i n g t h e i n p u t d a t a a n d a s s e r t i o n o f a n i r q w h e n a s i n g l e e r r o r i s d e t e c t e d : 1 . w r i t e t o t h e f o l l o w i n g r e g i s t e r s t o e n a b l e t h e s e d a n d l o a d t h e c o m p a r i s o n v a l u e s w i t h a 4 - d e e p u s e r p a t t e r n . c o m p a r i s o n v a l u e s c a n b e c h o s e n a r b i t r a r i l y ; h o w e v e r , c h o o s i n g v a l u e s t h a t r e q u i r e f r e q u e n t b i t t o g g l i n g p r o v i d e s t h e m o s t r o b u s t t e s t . a . r e g i s t e r 0 x 6 1 [ 7 : 0 ] i 0 [ 7 : 0 ] b . r e g i s t e r 0 x 6 2 [ 7 : 0 ] i 0 [ 1 5 : 8 ] c . r e g i s t e r 0 x 6 3 [ 7 : 0 ] q 0 [ 7 : 0 ] d . r e g i s t e r 0 x 6 4 [ 7 : 0 ] q 0 [ 1 5 : 8 ] e . r e g i s t e r 0 x 6 5 [ 7 : 0 ] i 1 [ 7 : 0 ] f . r e g i s t e r 0 x 6 6 [ 7 : 0 ] i 1 [ 1 5 : 8 ] g . r e g i s t e r 0 x 6 7 [ 7 : 0 ] q 1 [ 7 : 0 ] h . r e g i s t e r 0 x 6 8 [ 7 : 0 ] q 1 [ 1 5 : 8 ] 2 . e n a b l e s e d . a . r e g i s t e r 0 x 6 0 0 x d 0 b . r e g i s t e r 0 x 6 0 0 x 9 0 3 . e n a b l e t h e s e d e r r o r d e t e c t f l a g t o a s s e r t t h e i r q x p i n . a . r e g i s t e r 0 x 0 4 [ 6 ] = 1 4 . s e t u p f r a m e p a r i t y a s t h e f r a m e s i g n a l . a . r e g i s t e r 0 x 0 9 = 0 x 1 2 5 . b e g i n t r a n s m i t t i n g t h e i n p u t d a t a p a t t e r n ( f r a m e s i g n a l ) i s a l s o r e q u i r e d b e c a u s e t h e d e p t h o f t h e p a t t e r n i s 4 ) . d e l a y l i n e i n t e r f a c e m o d e t h e d l l i s d e s i g n e d t o h e l p e a s e t h e i n t e r f a c e t i m i n g r e q u i r e - m e n t s i n v e r y h i g h s p e e d d a t a r a t e a p p l i c a t i o n s . t h e d l l h a s a m i n i m u m s u p p o r t e d i n t e r f a c e s p e e d o f 2 5 0 m h z , a s s h o w n i n t a b l e 2 . f o r i n t e r f a c e r a t e s l o w e r t h a n t h i s s p e e d , u s e t h e i n t e r f a c e d e l a y l i n e . i n t h i s m o d e , t h e d l l i s p o w e r e d o f f a n d a f o u r - t a p d e l a y l i n e i s p r o v i d e d f o r t h e u s e r t o a d j u s t t h e t i m i n g b e t w e e n t h e d a t a b u s a n d t h e d c i . t a b l e 1 6 s p e c i f i e s t h e s e t u p a n d h o l d t i m e s f o r e a c h d e l a y t a p . t a b l e 1 6 . d e l a y l i n e s e t u p a n d h o l d t i m e s ( g u a r a n t e e d ) d e l a y s e t t i n g 0 1 2 3 r e g i s t e r 0 x 5 e [ 7 : 0 ] 0 x 0 0 0 x 8 0 0 x f 0 0 x f e r e g i s t e r 0 x 5 f [ 2 : 0 ] 0 x 6 0 0 x 6 7 0 x 6 7 0 x 6 7 t s ( n s ) 1 ? 0 . 8 1 ? 0 . 9 7 ? 1 . 1 3 ? 1 . 2 8 t h ( n s ) 1 . 9 6 2 . 2 0 2 . 5 3 2 . 7 9 | t s + t h | ( n s ) 1 . 1 5 1 . 2 3 1 . 4 0 1 . 5 1 1 t h e n e g a t i v e s i g n i n d i c a t e s t h e d i r e c t i o n o f t h e s e t u p t i m e . t h e s e t u p t i m e i s d e f i n e d a s p o s i t i v e w h e n i t i s o n t h e l e f t s i d e o f t h e c l o c k e d g e a n d n e g a t i v e w h e n i t i s o n t h e r i g h t s i d e o f t h e c l o c k e d g e . t h e r e i s a f i x e d 1 . 3 8 n s d e l a y o n t h e d c i s i g n a l w h e n t h e d e l a y l i n e i s e n a b l e d . e a c h t a p a d d s a n o m i n a l d e l a y o f 2 0 0 p s t o t h e f i x e d d e l a y . t o a c h i e v e t h e b e s t t i m i n g m a r g i n , t h a t i s , t o c e n t e r t h e s e t u p a n d h o l d w i n d o w i n t h e m i d d l e o f t h e d a t a e y e , t h e u s e r m a y n e e d t o a d d a d e l a y o n t h e d a t a b u s w i t h r e s p e c t t o t h e d c i i n t h e d a t a s o u r c e . f i g u r e 3 8 i s a n e x a m p l e o f c a l c u l a t i n g t h e o p t i m a l e x t e r n a l d e l a y . r e g i s t e r 0 x 0 d , b i t 4 c o n f i g u r e s t h e d c i s i g n a l c o u p l i n g s e t t i n g s f o r o p t i m a l i n t e r f a c e p e r f o r m a n c e o v e r t h e o p e r a t i n g f r e q u e n c y r a n g e . i t i s r e c o m m e n d e d t h a t t h i s b i t b e s e t t o 1 ( d c - c o u p l e d d c i ) i n t h e d e l a y l i n e i n t e r f a c e m o d e . f i g u r e 3 8 . e x a m p l e o f i n t e r f a c i n g t i m i n g i n t h e d e l a y l i n e i n t e r f a c e m o d e d a t a e y e n o d a t a t r a n s i t i o n i n p u t d a t a [ 1 5 : 0 ] w i t h o p t i m i z e d d e l a y d c i = 2 0 0 m h z t d e l a y = 0 . 6 3 n s t d a t a p e r i o d = 2 . 5 n s | t s | = 1 . 2 5 n s | t h | = 2 . 5 1 n s 1 1 9 0 1 - 0 3 9 a d 9 1 4 2 a d a t a s h e e t r e v . 0 | p a g e 2 8 o f 7 2 i n t e r f a c e t i m i n g r e q u i r e m e n t s t h e f o l l o w i n g e x a m p l e s h o w s h o w t o c a l c u l a t e t h e o p t i m a l d e l a y a t t h e d a t a s o u r c e t o a c h i e v e t h e b e s t s a m p l i n g t i m i n g i n t h e d e l a y l i n e i n t e r f a c e m o d e : x f d c i = 2 0 0 m h z x d e l a y s e t t i n g = 0 t h e s h a d o w a r e a i n f i g u r e 3 8 i s t h e i n t e r f a c e s e t u p a n d h o l d t i m e w i n d o w s e t t o 0 . t o o p t i m i z e t h e i n t e r f a c e t i m i n g , t h i s w i n d o w m u s t b e p l a c e d i n t h e m i d d l e o f t h e d a t a t r a n s i t i o n s . b e c a u s e t h e i n p u t i s d o u b l e d a t a r a t e , t h e a v a i l a b l e d a t a p e r i o d i s 2 . 5 n s . t h e r e f o r e , t h e o p t i m a l d a t a b u s d e l a y , w i t h r e s p e c t t o t h e d c i a t t h e d a t a s o u r c e , c a n b e c a l c u l a t e d a s n s 1 3 . 0 2 5 . 1 3 8 . 1 2 2 | ) | | ( | p e r i o d d a t a h s d e l a y t t t t s p i s e q u e n c e t o e n a b l e d e l a y l i n e i n t e r f a c e m o d e u s e t h e f o l l o w i n g s p i s e q u e n c e t o e n a b l e t h e d e l a y l i n e i n t e r f a c e m o d e : 1 . 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