preliminary technical data a 64-position otp i 2 c compatible digital potentiometer preliminary technical data AD5171 fe a t ures ? se t & forge t one time pro g ra mma b le wipe r set ? 64 po sitio n ? en d -to -en d r esistan c e 5k, 10k, 50 k, 100 k ? ? co mp act sot 23-8 (2.9 x 3m m) pack ag e ? i 2 c in terface ? full re a d / w r i t e of w i pe r re gi s t e r ? extra pa ck ag e ad d r ess d e c o d e p i n a 0 ? po w e r on reset to mid scale ? i dd ~ 0.01 a ? single s upp ly +2.7v to +5.5v ? l o w t e mp eratu r e co efficien t 35p p m / c ? w i d e op eratin g t e mp eratu r e ?40 c to +125 c a p plic a t ions ? perm an en t f acto r y pcb set t in g ? re s i s t or a d ju s t me nt & fina l se t ? re pla c e me nt of trimme rs ? in ne w de s i gn s ? pres su re, t e mp eratu r e, po sitio n , ch emical a nd opt i c a l s e ns or ca libra tion ? rf a m plifie r bia s i ng ? a u to mo ti v e electro n i cs a d j u stmen t ? gain contro l and offset a d justment gener a l d escription the ad5 171 provide s a co mpact 2.9x3 mm packa ge d solutio n for 6 4 positio n ot p adjustme n t appli c ation s . this devi c e p e rform s the same ele c tro n i c adju s tment function a s a mech ani cal trimmer ? o r a variabl e resi sto r . available in four d i fferent end -to-en d resi stan ce val ues (5k, 10 k, 50k, 10 0k ? ) these low temperature coeffici ent de vices a r e ide a l for high accuracy and stability variable resistance adju s tments. these devices will provide variable resistance under 2-wi re i 2 c co mpatible p r og ram control in servo adju s tment factory appli c ati ons. on ce th e final value is determine d . the use r progra m s a p e rmanent write comm and fre e zin g the wip e r po sition at the desi r ed setting (a nalo gou s to placi ng epoxy on a mech ani cal notes: 1. the term s d i gita l potenti o meter s , v r , and rdac are u s ed inter c hangea bly . trimmer). thi s one time p r ogra m set s a validation bit, whi c h can be read th rou gh the i 2 c interfac e. onc e this ackn owl e dge bit is set the wipe r po sition can n o t be ch ang ed d ue to power supply se que n c ing, temperature, rf fields, es d expo sure, whe n maintaine d wi thin its absolu t e maximum ratings. fo r appli c ation s that requi re co ntinuou s infre quent adju s tment of wiper re sista n ce setting s, see the ad523x/ad5 25x families o f nonvolatile memory digital potenti o meters. operating fro m a 2.7 to 5.5 volt power supply con s umi ng le ss tha n 1ua a llows for usag e in portabl e battery ope ra ted appli c atio ns. fu nc tional d i a g ra m i 2 c i n t e r f a c e wi p e r reg i st er a w b v dd a0 sd a scl gnd pin co nfig ur atio n a w b v dd a0 sd a sc l gnd 8 7 6 5 4 3 2 1 rev prb , 13 dec? 02 i n f o rmat ion f u rnished by analog devices is beli e ved t o be accurat e and reliable. however, n o responsibil it y is assumed by analog devices f o r it s use; nor f o r any i n f r ingement s of pat ent s or ot her right s of t h ird part i es which may re sult f r om it s use. no license is grant ed by implicat ion or ot herwise under any pat ent or patent right s of analog devices. o n e t echn o l o g y w ay, p.o . b o x 9106, nor w ood, ma 02062-910 6 u . s . a . t e l : 781/ 329-4700 w o rld wi d e w e b si te: h t tp:/ /w ww . a n a lo g . c o m f ax: 781/ 326-8703 ? an a l og devi ces, i n c . , 2002
preliminary technical data 64 position digital potentiometer AD5171 AD5171 elect r ical characteristics 5k, 10k, 50k, 100k : version (v dd = +5v r ?10%, or +3v r ?10%, v a = +v dd , v b = 0v, -4 0c < t a < +125 c unless other w i se noted.) pa rame ter sy mbol condit i ons min ty p 1 max units dc characteristics rheostat mode resist or dif f e rent ial nonlinearit y 2 r-dnl r wb , v a = no connect -1 0. 25 +1 lsb resist or i n t egral no nlinearit y 2 r-inl r wb , v a = no connect -2 0. 5 +2 lsb nominal resist or tolerance 3 ' r ab t a = 25c -30 30 % resist ance tempera t ure coef f i cient r ab / ' t v ab = v dd , wiper = no connect 35 ppm/ c wiper resist ance r w v dd = +5v 50 100 : dc characteristics potentiometer divider mod e specif icat ions ap ply t o all vrs resolut i on n 8 bit s dif f e rent ia l nonlinearit y 4 dnl ?1 1/4 +1 lsb i n t egral nonlinearit y 4 i n l ?2 1/ 2 +2 lsb volt age divider temper at ure coef f i cient ' v w / ' t code = 80 h 5 ppm/ c full-scale error v wfs e code = ff h ?1. 5 -0. 5 +0 l s b z e ro-sc a le error v wzs e code = 00 h 0 +0.5 +1.5 l s b resistor terminals volt age range 5 v a,b,w v ss v dd v capacit ance 6 a, b c a,b f = 1 mhz, measured t o gnd, code = 80 h 45 pf capacit ance 6 w c w f = 1 mhz, measured t o gnd, code = 80 h 60 pf shut down supply cu rrent 7 i dd_ sd v dd = 5. 5v 0. 01 5 p a common-mode leak age i cm v a =v b = v dd / 2 1 na di gi tal i n puts & outputs i nput logic high v ih 2. 4 v i nput logic low v il 0. 8 v i nput logic high v ih v dd = +3v 2.1 v i nput logic low v il v dd = +3v 0.6 v i nput current i il v in = 0v or +5v 1 a i nput capacit ance 6 c il 5 pf power supplies logic supply v logic 2. 7 5. 5 v single-supply rang e v dd range v ss = 0v -0. 3 5. 5 v supply current i dd v ih = +5v or v il = 0 v 5 a power dissipation 8 p diss v ih = +5v or v il = 0 v , v dd = +5v 0.2 mw power supply sensitivity pss ' v dd = +5v 10%, code = midscale -0. 01 0. 001 +0. 01 %/% dynamic characteristics 6, 9 bandwidt h ?3db bw_10k r ab = 10k : , code = 80 h 600 khz bandwidt h ?3db bw_50k r ab = 50k : , code = 80 h 100 khz tot a l harmonic dist o r t i on thd w v a =1 vrms , v b = 0 v , f=1 k hz , r ab = 10k : 0. 003 % v w set t ling time (10k : / 50k : ) t s v a = 5v, v b =0v, 1 lsb error band 2/ 9 s resist or noise volt age densit y e n_ wb r wb = 5k : , rs = 0 9 nv ? hz rev prb , 13 dec? 02 - 2 -
preliminary technical data 64 position digital potentiometer AD5171 AD5171 elect r ical characteristics 5k, 10k, 50k, 100k : version (v dd = +5v r ?10%, or +3v r ?10%, v a = +v dd , v b = 0v, -4 0c < t a < +125 c unless other w i se noted.) pa rame ter sy mbol condit i ons min ty p 1 max units interface timi ng characteri s tics ap pli e s to all parts (notes 6,1 2 ) scl cloc k frequ e n c y f scl 400 khz t buf bus f r ee t i me b e t w een sto p & st art t1 1.3 s t hd;st a hold tim e (repe ate d start) t2 af t e r t h is period t he f i rs t clock pulse is generat ed 0.6 s t lo w low perio d o f scl cloc k t3 1.3 s t high high peri od of scl cl oc k t4 0.6 50 s t su;sta setup time for st art co nd i t io n t 5 0 . 6 s t hd;dat data hold time t6 0.9 s t su;dat data setu p ti me t7 100 ns t f fall t i m e of bo t h sda & scl s i gn als t8 300 ns t r ris e ti me of b o t h sda & scl s i g nals t9 300 ns t su;st o setup t i me for stop co ndi ti on t10 0.6 s notes: 1. t y picals represent av erage readings at +25c and v dd = +5v. 2. resist or posit ion nonlin earit y error r-i n l is t he deviat i on f r om an ideal value measured bet wee n t he maximum resist ance and t he minimum res i st ance wiper posit ions. r-dnl measures t he relat i ve st ep change f r om ideal bet ween successive t ap posit ions. parts are guarant eed monot onic. 3. v ab = v dd , w i per (v w ) = no connect 4. i n l and dnl are meas ured at v w wit h t he rd ac conf igured as a potent iomet e r divider similar t o a volt age out put d / a convert e r. va = v dd a nd v b = 0v. dnl specif icat ion limit s of 1lsb maximu m are g uarant eed monot onic operat ing condit i ons. 5. resist or t e rminals a,b,w have no limit at i ons o n polarit y wit h respect to each ot her. 6. g uarant eed by design and not subject t o produc t i on t e st . 7. measured at t he a t e rmi nal. a t e rmi nal is open c i rcuit ed in shut down mode. 8. p diss is calculat ed f r o m (i dd x v dd ). cmo s logic level inp u t s result i n minimum power dissipat ion 9. all dynamic charact e ristics use v dd = +5v. 10. see t i ming diagram f o r l o cat i on of measured values . all input cont rol vo lt ages are specif ied wit h t r =t f =2ns(10% t o 90% of +3v) and t i med f r o m a vo lt age level of 1. 5v. swit ching charact e rist ics are measured using v logic = +5v. 11. the AD5171 contains xxxx transistor s . di e siz e : 30.7mil x 76.8 mil, 23 58sq. mil. 12. see t i ming diagram f o r l o cat i on of measured values. caut ion esd (ele ctrost at ic d i scharg e) sen s itive devi ce . el ectrost ati c charg e s as high as 400 0 v re adil y accum u la te on t h e hum an bod y and t e st equipm e n t and c a n dis c h a rge wi thout det ect ion. although the AD5171 featur es proprietar y esd protection cir c u itr y , permanen t damage may occur on d e vices s ubject ed to hig h -energ y el ectro s t atic dis c h a rges . th erefor e, prop er es d pr ecau ti ons are recom m e nded to avo i d p e rform ance degr adat ion or loss of functionality . rev prb , 13 dec? 02 - 3 -
preliminary technical data 64 position digital potentiometer AD5171 a b solute ma ximum r a ti ngs 1 (t a = + 25c, unl ess other w i se not e d ) v dd to gnd ...................................................... -0.3, +7v v a , v b , v w to gnd ................................................... v dd i ma x ..................................................................... 20ma 2 digital inputs & output vo ltage to gnd .............. 0v, +7v operating t e m peratur e ra nge .............. -40c to +125 c maximum ju nc tion t e mperatu r e (t j ma x ) .............. +150c storage t e mperature ............................. -65c to +150 c lead t e mperatur e (soldering, 10 sec) ................ +300c t hermal resist ance 3 ja, sot 23-8 ................................................ 230 c/w notes 1. st resses above t hos e list ed under absolut e maximum rat i ngs may cause permanent damage t o t he device. t h is is a s t ress rat i ng; funct i onal operat ion of t he device at t hese or any ot her condit i ons above t hose list ed in t he o perat ional sect ions of t h is specif icat ion is not implied. exposure t o absolut e maximum rat i ng condit i ons f o r ext ended periods may af f e ct device reliabi lit y. 2. maximum t e rminal cu rrent is bounded by t he maximum current handling of t he swit ches , maximum power dissipat ion of t he package, an d maximum applied volt age across any t w o of t he a, b, and w t e rminals at a given resist ance 3. package power diss ipat ion (t jm ax -t a )/ ja or derin g guide mode l # r ( ? ) package descripti on package option brand ad51 71brj 5 5 k sot 2 3 - 8 r j - 8 d 1 2 ad51 71brj 10 1 0 k sot 2 3 - 8 r j - 8 d 1 3 ad51 71brj 50 5 0 k sot 2 3 - 8 r j - 8 d 1 4 ad51 71brj 10 0 1 0 0 k sot 2 3 - 8 r j - 8 d 1 5 rev prb , 13 dec? 02 - 4 -
preliminary technical data 64 position digital potentiometer AD5171 write mod e : s 0 1 0 1 1 0 a 0 w a x r s s d x x x x x a d x d x d 5 d 4 d 3 d 2 d 1 d 0 a p slave ad dress b y te instruction b y t e data b y t e read mode: s 0 1 0 1 1 0 a 0 r a d x d x d 5 d 4 d 3 d 2 d 1 d 0 a p slave ad dress b y te data b y t e s = start condi tion p = stop condi tion a = ackno w ledge x = don?t care w = write r = read rs = reset w i per to midscale 20 h sd = shutdo w n conn ects w i p e r to b terminal and op en circ uits a terminal. it does not cha nge contents of w i p e r register. d5,d4,d3,d2, d1,d0 = data bits t 4 sda sc l p s s p t 1 t 2 t 3 t 7 t 6 t 5 t 8 t 8 t 9 t 10 f i gure 1. deta il t i min g dia gra m sc l sd a 1 9 1 0 1 1 0 ad0 0r / w ack. b y a d 517 1 x x d5 d3 d4 d0 d1 d2 1 9 ack. by ad 5 1 7 1 0 rs s d x x x x x 1 9 ac k. by a d 5 171 fr a m e 1 s l av e a dd r e s s b y t e st a r t b y m ast er fr a m e 2 i n st r u c t i o n b yt e fr a m e 3 d a ta by te st o p by m a st er f i gure 2 a . w r iting to the rda c regist er sc l sd a 1 9 1 0 1 1 0 ad0 0r / w ack. b y a d 517 1 x x d5 d3 d4 d0 d1 d2 1 9 ack. by ad 5 1 7 1 t xx x x x x x 1 9 ac k. by a d 5 171 fr a m e 1 s l av e a dd r e s s b y t e st a r t b y m ast er fr a m e 2 i n st r u c t i o n b yt e fr a m e 3 d a ta by te st o p by m a st er f i gure 2b. acti vating one t i me progra mmin g sc l sd a 1 9 1 0 1 1 0 ad 0 0r / w a c k. by a d 5 171 1 9 e1 e0 d5 d3 d4 d0 d1 d2 no ack . by m a s t e r fr am e 1 s l av e a ddr es s b y t e st ar t b y m aste r fr am e 2 d a t a b y t e fr om s e l e c t ed rd a cr e g is t er st o p by ma s t e r f i gure 3. re ad ing d a ta from a previo usly s e lecte d rdac regist er in w r ite mode rev prb , 13 dec? 02 - 5 -
preliminary technical data 64 position digital potentiometer AD5171 table 1: a d 51 71 pin descriptio ns pin name des c ription 1 w w t e rminal 2 v dd positive po w e r suppl y 3 gnd ground 4 scl serial c l ock in put, positive ed ge trigger ed 5 sda serial da ta input/output 6 a0 programm abl e address b i t 0 for multipl e pack a ge dec od ing 7 b b t e rminal 8 a a t e rminal pin co nfig ur atio n a w b v dd a0 sd a sc l gnd 8 7 6 5 4 3 2 1 outline dimensions dimen s io ns shown in inche s and (millim eters) rev prb , 13 dec? 02 - 6 -
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