2SA-10 november 20 04 page 1 of 8 2SA-10 integrated 2-axis hall sensor features ? measures two comp one nts of a magnet ic field at the same spot. ? excellent mat c hin g of sen s i t ivity along the two axes. ? max. angle error from ?40 c ..+125 c: < 1 ? very high sensitivity ? low q u ie scen t current ? fabri c ate d in stand ard cm os techn o log y ? very low hyst ere s is ? surface mou n t soic-8 pa ckage applications ? 2-d p o sitio n sensi ng ? conta c tle ss p o tentiomete r ? angula r po sition se nsor for micro motors ? miniaturi z e d conta c tle ss e n co der ? contac tles s rotary switc h ? 2-d m agn etic field mappin g ? joy s t i ck general description sentron? s ne w magn etic a ngula r se nsor 2SA-10 det e c ts the ab sol u te angul ar p o sition of a small magnet that is po sitione d above the de vice su rface. the 2sa-1 0 is an integ r ate d combi natio n of a cmos hall ci rcuit an d a thin ferro magn e t ic disk. the cmos ci rcuit contain s two pairs of hall -element s for each of the two dire ctio ns pa rallel with the chip surface x and y. the ferroma gnetic di sk a m plifies the external magneti c field and con c en trates it on th e hall elem en ts. the 2sa-1 0 is ideally suite d for rota ry posit ion sen s in g in harsh aut omotive and i ndu strial environ ment s. it produ ce s two line a r, rati o-metri c outp u t voltages proportio nal to the sin e and t he co sine fun c tio n of the angle of the applie d m agneti c field parallel to the chip surf ace. the ci rcuit is fabricated u s i ng a stan dard cmos proce ss a nd the ferroma gneti c di sk i s add ed in a simple p o st -p rocessin g ste p . the monoli t hic device in corpo r ate s hall element s, offset can c ell a tion circuitry, cu rrent sou r ce, chopp er sta b ili zed am plif icat ion circuit r y, para m eter p r ogra mming capability. by dynamic o ffset can c ellat i on any offset voltage ca u s ed by temperature vari atio ns, pa ckagin g stre ss or othe rs i s st rongly redu ce d. as a result, the device h a s an extre m ely stable si g nal output, is immune to mecha n ica l stre ss a nd is virtua lly immune to tempe r ature cycli n g . therefore, th e circuit featu r es a wide a p p licatio n ran g e and very hi gh accu ra cy. sentro n a g ? baarerstrass e 73 ? 6300 zu g ? s w itzerland ? tel: +41 (4 1) 711 21 70 ? fax: +41 (41) 71 1 2188 www . sen t r o n . ch ? sales@se ntro n.ch ? for n o rth a m eri ca: gmw a s so ciates ? tel : + 1 ( 650 ) 802-8 292 ? fax: +1 ( 65 0 ) 802-8 298 ? sal es @g mw . c o m
2SA-10 november 20 04 page 2 of 8 packag e: soic-8 pin-out: 1 co_o ut, comm on outp u t 2 pc, programming clo c k 1) 3 vdd, supply voltage 4 y_out, y-ch ann el anal og output 5 x_out, x-ch ann el anal og output 6 pd, programming d a ta 1) 7 pv, programming volta g e 1) 8 gnd, supply c o mmon by bx note 1: used fo r factor y p r ogr am ming absolute maximum ratings symbol paramete r min. max. unit rema r ks v sup supply voltage 0 6 v t a m b i e n t tem peratu r e - 4 0 +12 5 o c magnetic input conditions symbol paramete r min. max. unit rema r ks b max 2) max. inductio n >10 00 mt device s a turates , but is not damag ed d fc diamete r of magneti c disk 0 . 2 m m see figure 5 for loc a tion of disk a n g u l a r spee d 100?0 0 0 r p m note 2: at center of magnetic disc recommended operating conditions symbol paramete r min. typ. max. unit rema r ks v sup supply voltage 4.5 5 5.5 v i out output cu rre n t -1 1 ma c l load cap a cit ance 1000 pf b 3) magneti c fiel d 80 mt note 3: at center of magnetic disc sentro n a g x baarerstrass e 73 x 6300 zu g x s w itzerland x tel: +41 (4 1) 711 21 70 x fax: +41 (41) 71 1 2188 www . sen t r o n . ch x sales@se ntro n.ch x for n o rth a m eri ca: gmw a s so ciates x tel : + 1 ( 650 ) 802-8 292 x fax: +1 ( 65 0 ) 802-8 298 x sal es @g mw . c o m
2SA-10 november 20 04 page 3 of 8 electrical characteristics at t=-40 c to 150 c, v sup =4.5v to 5.5v if not otherwi se spe c ified. symbol paramete r min. typ. max. unit test conditio n s i sup supply cu rre nt 16 18 ma co_ o u t comm on (ref eren ce ) output voltag e 4) v sup /2 -20mv v sup /2 v sup /2 +20mv i out =0ma bw bandwi d th: dc to 10 15 18 khz note 4: ratio - me tric (propo rtional to v su p ) analog output-characteristics 5,6) with v sup = 5v and in the tempe r ature range -40 o c to 150 o c, if not otherwi se specifie d. symbol paramete r min. typ. max. unit test conditio n s s m a g n e t i c sen s i t i v i t y 6) 4 0 5 0 6 0 v / t ? s/s ? t magneti c sen s itivity tempe r atu r e drift - 0 . 0 5 0 . 0 5 % / c i out =0ma t=-40 c to 1 50 c sx/sy magneti c sen s itivity mismat ch (x - y ) 6) 0 2 % b = b l 7) sx-sy phase m a tchi ng -0.3 0 0.3 b = b l 7) v o f f o f f s e t voltag e - 1 0 0 1 0 m v b= 0t 7) , i out =0ma t=-20 c to 8 0 c ? voff/ ? t offset voltag e tempe r atu r e drift - 0 . 0 5 0 . 0 5 m v / c b= 0t 7) , i out =0ma b fs 7,8 ) full scale ma gnetic fiel d ran ge - 4 5 4 5 m t b l 7,8) linea r mag n e t ic field ran ge - 4 0 4 0 m t 0 . 1 0 . 2 % for b ? b l 7) n l n o n li nea r i t y 0 . 5 1 % for b ? b fs 7) ? bnoise 7) input referred magnetic noise sp ectru m density (rms ) 7 5 0 nt/ hz b w = 1 hz to 10khz x_out max max. full scal e output voltage 5% v sup 95% v sup v | b | ? 50mt y_out max max. full scal e output voltage 5% v sup 95% v sup v | b | ? 50mt hys max maximum hy steresi s 0.03 % b fs |b| ? b ma x note 5: when th e analog output pins x_out an d y _ ou t are used in differential mode (i.e. vx=x_ o ut-c o_ ou t) note 6: ratio - me tric (propo rtional to v su p ) note 7: at center of magnetic disk note 8: t he 2sa - 10 can also be o r dered w i t h sensitivity of 25v/t f o r b l =60mt and b fs =80mt sentro n a g ? baarerstrass e 73 ? 6300 zu g ? s w itzerland ? tel: +41 (4 1) 711 21 70 ? fax: +41 (41) 71 1 2188 www . sen t r o n . ch ? sales@se ntro n.ch ? for n o rth a m eri ca: gmw a s so ciates ? tel : + 1 ( 650 ) 802-8 292 ? fax: +1 ( 65 0 ) 802-8 298 ? sal es @g mw . c o m
2SA-10 november 20 04 page 4 of 8 block diagram 2SA-10 fig. 1 block dia g ra m 2SA-10 connectio n diagram 2SA-10 important for reliable o peratio n withi n the spe c if ications the se nso r mu st be con n e c ted as follows : con n e c t pin 6 (pd) to pin 8 (g nd) con n e c t pin 2 (pc) to pin 3 (vdd) con n e c t pin 7 (pv) to pin 3 (vdd) put a 100nf cap a cito r clo s e to the chip betwe en pin 3 (vdd) a nd pin 8 (gnd) 1 c o _o ut 2 pc 3 vd d 4 y_ou t gnd 8 pv 7 pd 6 x_o u t 5 gn d v su p gnd 10 0 n f * 2s a -1 0 * if the suppl y vol t age is disturbed b y emi it c an be useful to place a second capacitor (100pf , ceramic) parallel to the 100n f cap a citor. fig. 2 con n e c tion di agram of 2SA-10 sentro n a g ? baarerstrass e 73 ? 6300 zu g ? s w itzerland ? tel: +41 (4 1) 711 21 70 ? fax: +41 (41) 71 1 2188 www . sen t r o n . ch ? sales@se ntro n.ch ? for n o rth a m eri ca: gmw a s so ciates ? tel : + 1 ( 650 ) 802-8 292 ? fax: +1 ( 65 0 ) 802-8 298 ? sal es @g mw . c o m
2SA-10 november 20 04 page 5 of 8 packag e dimensions soic-8 by bx bx, b y : ma gnetic s e nsitiv e directions fig. 3 packag e dim ensi o n s and m agnetic sen s itive di re ctio ns dimension and pads 2SA-10 in dice form (all dimensions in m) vdd pc y_o u t co _ o u t bx by x_o u t gn d pd pv 19 0 0 28 0 0 by bx fig. 4 2SA-10 dim e nsio ns of di ce sentro n a g ? baarerstrass e 73 ? 6300 zu g ? s w itzerland ? tel: +41 (4 1) 711 21 70 ? fax: +41 (41) 71 1 2188 www . sen t r o n . ch ? sales@se ntro n.ch ? for n o rth a m eri ca: gmw a s so ciates ? tel : + 1 ( 650 ) 802-8 292 ? fax: +1 ( 65 0 ) 802-8 298 ? sal es @g mw . c o m
2SA-10 november 20 04 page 6 of 8 location of disk ` 2 . 5 m m 2 . 0 m m 0.8mm fig. 5 2SA-10 lo cati on of disk sentro n a g ? baarerstrass e 73 ? 6300 zu g ? s w itzerland ? tel: +41 (4 1) 711 21 70 ? fax: +41 (41) 71 1 2188 www . sen t r o n . ch ? sales@se ntro n.ch ? for n o rth a m eri ca: gmw a s so ciates ? tel : + 1 ( 650 ) 802-8 292 ? fax: +1 ( 65 0 ) 802-8 298 ? sal es @g mw . c o m
2SA-10 november 20 04 page 7 of 8 applications the uniq ue in tegrated two-axis hall -sen sor offe rs a rugge d, low cost sol u tion for any rotatio nal referen c e det ection. appli c ation exampl es are found i n conta c tle ss angul ar sen s ors a nd en co ders, in rotational swit che s , in bru s hless d c motors a nd in joy s ticks the 2sa-1 0 is appli ed in a way very sim ilar to magn etore s istive gm r and am r a ngula r se nsors by sen s in g the rotation of a magneti c field compon ent pa rallel with the chip. howeve r, the full integration of magnetic fi eld se nsor an d prog ram m a b le sig nal con d itioning circu i t of the 2SA-10 offers an exceptio nal cost effectiven ess. sentron? s 2s a-10 combin es the adva n tage of a mini aturized an gu lar se nsor sol u tion and simultan eou sl y higher p r od uct perf o rma n ce a nd reli a b ility. the features of hig h sen s itivity, lo w offset and lo w temp eratu r e drift meets even t he most de m andin g req u irements a c ro ss many indu stries. absolute angle sensor the 2sa - 10 i s p o sition ed unde r a rotat i ng ma gnet mounted at t he shaft en d of a rotating axi s . the ma gnet i s mag netized diam etri cally , so that by rotating the shaft the field thro ugh the sen s or al so rotate s. the ge ne rated voltage s vx and vy o f the 2SA-10 rep r e s ent the sin e and co sine of the mag n e t ic field direct ion. even tho ugh the s i gnal amplitudes de pend upon the vertic al dis t anc e between s e ns or and magnet, th e angle inform ation, which i s cal c ulate d by the ratio o f vx and vy is n o t depe nding o n this value. in this mann er the angl e sen s o r is very robust toward s sensitivity te mperature dri ft, magnet te mper ature dri ft and ageing effects as well as ass e mbly toleranc es . a ngul a r p o si t i on s e ns or 0 1 2 3 4 5 0 6 0 1 20 180 240 300 360 a ngl e [ ] se ns or o u t put volt a g e s [ v ] v x (t ) = v 0 * s i n ( w * t ) v y (t ) = v 0 * c o s ( w * t ) sentro n a g ? baarerstrass e 73 ? 6300 zu g ? s w itzerland ? tel: +41 (4 1) 711 21 70 ? fax: +41 (41) 71 1 2188 www . sen t r o n . ch ? sales@se ntro n.ch ? for n o rth a m eri ca: gmw a s so ciates ? tel : + 1 ( 650 ) 802-8 292 ? fax: +1 ( 65 0 ) 802-8 298 ? sal es @g mw . c o m
2SA-10 november 20 04 page 8 of 8 linear position sensor the 2SA-10 is po sition ed in the vicinit y unde rneath a sm all pe rmanent m a g net with rou n d sha pe. t he magneti z atio n axis of th e magnet is pe rpen dicular to the se nsor pl ane. whe n th e magnet m o ves p a rall el to the plan e, the mag net ic field at the sensor rotate s. the output sign al vx of the 2sa - 10 b ehave s li ke x*b/r^2 an d th e outp u t sign al vy like y*b / r^2 with x an d y being the coordi nate s of the magnet with resp ec t to the sen s o r , b being the field stren g th at the sen s o r a nd r being th e distan ce be tween ma gne t and sen s o r . if the magne t now moves parall e l to the x-axis, the coo r din a te y is co n s tant and the ratio vx/vy = x/const. is a very linear me asure of the position of the magnet. using a seco nd 2sa-1 0 sen s o r the prin ciple ca n be extende d to ver y linear t w o-dime nsio nal p o s ition sensi n g . o u t put s i gn a l s x - a n d y - a x is -0 .1 0 -0 .0 5 0. 00 0. 05 0. 10 0. 15 0. 20 -3 .0 0 - 2 . 0 0 -1 .0 0 0 .0 0 1 . 0 0 2 . 0 0 3 . 0 0 d i sp l a cem en t x [ m m ] out put vol t age [ m v] -1 .5 0 -1 .0 0 -0 .5 0 0. 00 0. 50 1. 00 1. 50 ra tio v x /v y vx vy x/ y li nea r ( x / y ) position sensor / joy s tick the 2SA-10 is p o sitio ned in th e rotation cen t er of a joystick control hand le, whi c h h o lds a perm ane nt magnet at its lowe r end. in cente r ed po sition t he fiel d emanatin g from the ma gnet i s exactly perp e ndicular to th e chip surfa c e a nd the sen s o r ou tput is zero for x an d y. as soon as th e stick is incli n e d , the sensor output become s po sitive or negat ive on x and y. the output si gnal i s linear with the inclin atio n angle for a ra nge of about 30 of inclination please conta c t us for d o cu mentation su ch a s appli c at ion note s , technical pape rs and others. sentro n a g ? baarerstrass e 73 ? 6300 zu g ? s w itzerland ? tel: +41 (4 1) 711 21 70 ? fax: +41 (41) 71 1 2188 www . sen t r o n . ch ? sales@se ntro n.ch ? for n o rth a m eri ca: gmw a s so ciates ? tel : + 1 ( 650 ) 802-8 292 ? fax: +1 ( 65 0 ) 802-8 298 ? sal es @g mw . c o m
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