apr-04-2001 1 BB555-02V 1 ves05991 2 silicon tuning diode for uhf-tv-tuners high capacitance ratio low series inductance low series resistance extremely small plastic smd package excellent uniformity and matching due to "in-line" matching assembly procedure type marking pin configuration package BB555-02V inline matched BB555-02V unmatched bb bb 1 = c 1 = c 2 = a 2 = a - - sc79 sc79 maximum ratings parameter symbol value unit diode reverse voltage v r 30 v peak reverse voltage- r 5k v rm 35 forward current i f 20 ma operating temperature range t op -55 ... 150 c storage temperature t stg -55 ... 150 electrical characteristics at t a = 25c, unless otherwise specified parameter symbol values unit min. typ. max. dc characteristics reverse current v r = 30 v v r = 30 v, t a = 85 c i r - - - - 10 200 na
apr-04-2001 2 BB555-02V ac characteristics diode capacitance- v r = 1 v, f = 1 mhz v r = 2 v, f = 1 mhz v r = 25 v, f = 1 mhz v r = 28 v, f = 1 mhz c t 17.5 14.01 2.05 1.9 18.7 15 2.24 2.1 20 16.1 2.4 2.3 pf capacitance ratio v r = 1 v, v r = 28 v, f = 1 mhz c t1 / c t28 8.2 8.9 9.8 - capacitance ratio v r = 2 v, v r = 25 v, f = 1 mhz c t2 / c t25 6 6.7 7.5 capacitance matching 1) v r = 1 v, v r = 28 v, f = 1 mhz, 4 diodes sequence v r = 1 v, v r = 28 v, f = 1 mhz, 7 diodes sequence c t / c t - - 0.15 0.25 1 2 % series resistance v r = 3 v, f = 470 mhz r s - 0.58 - series inductance l s - 0.6 - nh 1 in-line matching. for details please refer to application note 047
apr-04-2001 3 BB555-02V diode capacitance c t = (v r ) f = 1mhz 0 5 10 15 20 v 30 v r 0 2 4 6 8 10 12 14 16 pf 20 c t normalized diode capacitance c (ta) / c (25c) = ( t a ); f = 1mhz -30 -10 10 30 50 70 c 110 t a 0.96 0.98 1 1.02 1.04 - 1.08 c ta / c 25 1v 2v 25v temperature coefficient of the diode capacitance tc c = ( v r ) 10 0 10 1 10 2 v v r -5 10 -4 10 -3 10 1/c tc c reverse current i r = ( t a ) v r = 28 v -30 -10 10 30 50 70 c 100 t a 0 10 1 10 2 10 3 10 pa i r
apr-04-2001 4 BB555-02V reverse current i r = ( v r ) t a = parameter 10 0 10 1 10 2 v v r -1 10 0 10 1 10 2 10 3 10 pa i r 25c 85c
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