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3.3 v, full-duplex, 840 a, 20 mbps, eia rs-485 transceiver adm3491 rev. a in fo rmation furn ished by an alog d e v i c e s is believed to be accurate and reliable. how e ver, n o resp on sibili ty is assume d b y a n alog de vices fo r its use, nor for an y i n fri n geme nt s of p a t e nt s or ot h e r ri ght s o f th ird parties th at may result fro m its use . s p ecificatio n s subj ec t to ch an g e witho u t n o tice. no licen s e is g r an te d by implicati o n or ot herwi s e u n der a n y p a t e nt or p a t e nt ri ghts of analog de v i ces. trademarks an d registered tra d ema r ks are the prop erty o f their respective ow ners. one technolog y way, p.o . box 9106, norwood, ma 02062-9106, u.s.a. t e l: 781. 329. 4 700 www.analog.com fax: 781. 326. 87 03 ? 2004 analog de vices, i n c. al l r i ght s r e ser v ed . features operates with 3.3 v supply eia rs-42 2 and rs-485 compliant over f u ll c m range 19 k? input im pedance up to 50 transc eivers on bus 20 mbps data r a te short circuit protection specified over full t e mperatur e range thermal shut down interoperable with 5 v logic 840 a supply current 2 na sh utdown current also ava i lable i n tssop package meets iec10 00 -4-4 ( > 1 kv) 8 ns skew upgrade for m a x 349 1, sn75 als180 applic ati o ns telecommunications dteCdce interf ace packet switchi n g local area net w orks data concentration data m u ltiplex e rs integrated ser v ices digita l ne twork (isdn) appletalk industrial cont rols general description the ad m3491 is a lo w p o w e r , dif f er en tial l i n e tra n s c ei v e r desig n e d t o o p e r a t e usin g a sin g le 3.3 v p o w e r s u p p l y . l o w p o w e r co n s um pt io n, co u p le d w i t h a sh u t down m o d e , ma k e s i t ide a l fo r p o w e r - s e n s i t i v e a p plic a t io n s . i t is sui t ab le fo r co mm u- nica tio n on m u l t i p o i n t b u s tra n smis sio n lin e s. func tio n a l block di agram r d re de di a b z y a d m 3491 ro 05234-001 fi g u r e 1 . the ad m3491 is in t e nded f o r balan c e d da ta tr a n smis sio n an d co m p lies wi t h b o th ei a s t anda rds rs-485 and rs-422. i t co n t a i n s a dif f er en t i al li n e dr i v e r a n d a dif f er en t i al lin e r e ce i v er , m a k i n g it s u it a b l e f o r f u l l - d up l e x d a t a t r a n s f e r . the i n p u t i m p e dan c e is 19 k?, al lo win g u p t o 5 0 t r a n s c ei v e rs to b e co n n e c te d on t h e b u s. e x cessi v e p o w e r dissi p a t io n ca us e d b y bu s c o n t e n t i o n or by output s h or t i ng i s pre v e n te d by a t h e r m a l s h u t do w n cir c ui t. this fe a t ur e fo r c es t h e dr i v er o u t p ut in t o a hig h i m p e d a n c e st a t e , if a sig n if i c a n t t e m p er a t ure in cr e a s e is d e te c t e d i n t h e i n te r n a l d r ive r c i rc u i t r y d u r i ng f a u l t c o nd i t i o ns . the r e cei v er con t a i n s a fail-s a f e fe a t ur e t h a t r e su l t s in a log i c h i gh o u t p u t s t a t e , i f th e in p u ts a r e un co nn ec t e d (f loa t i n g). the ad m3491 is fa b r ica t e d o n b i cm os, a n adva n c ed mixed t e c h n o log y p r oces s com b inin g lo w p o w e r cm os wi th fas t s w i t ch ing b i p o l a r te ch nol o g y . the ad m3491 is f u l l y s p ecif ied o v er th e ind u s t r i al t e m p era t ur e ra n g e an d is a v ai la b l e i n dip and soi c p a ck a g e s , as w e l l as t h e sp ac e - s a v i ng t s s o p p a ckage.
adm3491 rev. a | page 2 of 16 table of contents specifications ..................................................................................... 3 timing specifications .................................................................. 4 absolute maximum ratings ............................................................ 5 esd caution .................................................................................. 5 pin configurations and function descriptions ........................... 6 te s t c i rc u it s ....................................................................................... 7 switching characteristics ................................................................ 8 typical performance characteristics ..............................................9 applications information .............................................................. 11 differential data transmission ................................................ 11 cable and data rate ................................................................... 11 receiver open-circuit fail-safe feature ................................ 11 outline dimensions ....................................................................... 12 ordering guide .......................................................................... 13 revision history 11/04rev. 0 to rev. a format updated..................................................................universal changes to specifications section.................................................. 3 changes to ordering guide .......................................................... 13 1/98revision 0: initial version
adm3491 rev. a | page 3 of 16 specifications v cc = 3.3 v 0.3 v. all specifications t min to t max , unless otherwise noted. table 1. parameter min typ max unit test conditions/comments driver differential output voltage, v od 2.0 v rl = 100 ?, figure 4, v cc > 3.1 v 1.5 v rl = 54 ?, figure 4 1.5 v rl = 60 ?, figure 5, ?7 v < v tst < +12 v ?|v od | for complementary output states 0.2 v r = 54 ? or 100 ?, figure 4 common-mode output voltage, v oc 3 v r = 54 ? or 100 ?, figure 4 ?|v oc | for complementary output states 0.2 v r = 54 ? or 100 ?, figure 4 cmos input logic threshold low, v inl 0.8 v cmos input logic threshold high, v inh 2.0 v logic input current (de, di, re ) 1.0 a output leakage (y, z) current 3 a v o = C7 v or +12 v, v cc = 0 v or 3.6 v output short-circuit current 250 ma v o = C7 v or +12 v receiver differential input threshold voltage, v th ?0.2 +0.2 v ?7 v < v cm < +12 v input voltage hysteresis, ?v th 50 mv v cm = 0 v input resistance 12 19 k? ?7 v < v cm < +12 v input current (a, b) 1 ma v in = 12 v ?0.8 ma v in = ?7 v logic enable input current ( re ) 1 a output voltage low, v ol 0.4 v i out = 2.5 ma output voltage high, v oh v cc C 0.4 v v i out = ?1.5 ma short-circuit output current 60 ma v out = gnd or v cc three-state output leakage current 1.0 a v cc = 3.6 v, 0 v < v out < v cc power supply current i cc outputs unloaded 0.84 1.5 ma de = v cc , re = 0 v 0.84 1.5 ma de = 0 v, re = 0 v supply current in shutdown 0.002 1 a de = 0 v, re = v cc
adm3491 rev. a | page 4 of 16 timing specifications v cc = 3.3 v, t a = 25c. table 2. parameter min typ max unit test conditions/ comments driver differential output delay, t dd 1 35 ns r l = 60 ?, c l1 = c l2 = 15 pf, figure 8 differential output transition time 1 8 15 ns r l = 60 ?, c l1 = c l2 = 15 pf, figure 8 propagation delay in put to output, t plh , t phl 7 22 35 ns r l = 27 ?, c l1 = c l2 = 15 pf, figure 9 driver output to output, t skew 8 ns r l = 54 ?, c l1 = c l2 = 15 pf, figure 9 enable/disable driver enable to output valid 45 90 ns r l = 110 ?, c l = 50 pf, figure 6 driver disable timing 40 80 ns r l = 110 ?, c l = 50 pf, figure 6 driver enable from shutdown 650 110 ns r l = 110 ?, c l = 15 pf, figure 6 receiver time to shutdown 80 190 300 ns propagation delay in put to output, t plh , t phl 25 65 90 ns c l = 15 pf, figure 11 skew, t plh C t phl 10 ns c l = 15 pf, figure 11 receiver enable, t en 25 50 ns c l = 15 pf, figure 7 receiver disable, t den 25 45 ns c l = 15 pf, figure 7 receiver enable from shutdown 500 ns c l = 15 pf, figure 7 v cc = 3.3 v 0.3 v, t a = t min to t max . table 3. parameter min typ max unit test conditions/ comments driver differential output delay, t dd 1 70 ns r l = 60 ?, c l1 = c l2 = 15 pf, figure 8 differential output transition time 2 8 15 ns r l = 60 ?, c l1 = c l2 = 15 pf, figure 8 propagation delay in put to output, t plh , t phl 7 22 70 ns r l = 27 ?, c l1 = c l2 = 15 pf, figure 9 driver output to output, t skew 10 ns r l = 54 ?, c l1 = c l2 = 15 pf, figure 9 enable/disable driver enable to output valid 45 110 ns r l = 110 ?, c l = 50 pf, figure 6 driver disable timing 40 110 ns r l = 110 ?, c l = 50 pf, figure 6 driver enable from shutdown 650 110 ns r l = 110 ?, c l = 15 pf, figure 6 receiver time to shutdown 50 190 500 ns propagation delay in put to output, t plh , t phl 25 65 115 ns c l = 15 pf, figure 11 skew, t plh C t phl 20 ns c l = 15 pf, figure 11 receiver enable, t en 25 50 ns c l = 15 pf, figure 7 receiver disable, t den 25 50 ns c l = 15 pf, figure 7 receiver enable from shutdown 600 ns c l = 15 pf, figure 7
adm3491 r e v. a | pa ge 5 o f 1 6 absolute maximum ratings t a = 2 5 c , u n l e ss ot he r w i s e not e d. table 4. p a r a m e t e r m i n v cc 7 v i n p u t s driver input (di) ?0.3 v to v cc + 0.3 v control inputs (de, re ) ?0.3 v to v cc + 0.3 v receiver inputs (a, b) ?7.5 v to +12.5 v o u t p u t s driver outputs ?7.5 v to +12.5 v receiver output ?0.5 v to v cc + 0.5 v 14-lead dip, po wer dissi pation 800 mw ja , thermal impedance 140c/w 14-lead soic, p o wer dissipation 650 mw ja , thermal impedance 115c/w 16-lead tssop, power dissi pati on 500 mw ja , thermal impedance 158c/w operating tem p erature range industrial (a ver s ion) ?40c to +85c storage temperature range ?65c to +150c lead temperature (soldering, 10 s) 300c vapor phase (60 s) 215c infrared (15 s) 220c esd rating >2 kv eft rating (iec1 000-4-4) >1 kv s t r e s s es a b o v e t h os e lis t e d u n de r a b s o l u t e m a xi m u m r a t i n g s ma y c a us e p e r m a n en t dama ge t o t h e de vice . this is a s t r e s s ra t i n g onl y a nd f u n c t i o n al op era t io n o f t h e de v i ce a t t h es e o r a n y o t h e r con d i t io n s ab o v e t h o s e i n dica t e d in t h e op era t io nal s e c t io n o f t h is sp e c if ic a t io n is no t im plie d . e x p o sur e t o a b s o l u te max i m u m ra t i ng co ndi t i on s fo r ex ten d e d p e r i o d s ma y a f fe c t de vice r e l i ab i l i t y . esd caution esd (electrostatic discharge) sensitive device. ele c tros tatic charg e s as high as 4000 v readily accumulate on the human body and test eq uipment and can discharge wi thout detection. although this product features proprietary esd protection circu i try, permanent dama ge may occur on devices subjected to high energy electrostatic discharges. theref ore, prop er esd precautions a r e recommended to avoid perform a nce degradation or l o ss of functiona l ity.
adm3491 r e v. a | pa ge 6 o f 1 6 pin conf igurations and f u ncti on descriptions nc 1 ro 2 re 3 de 4 v cc 14 v cc 13 a 12 b 11 di 5 z 10 gnd 6 y 9 gnd 7 nc 8 nc = no connect adm3491 top view (not to scale) 05234-002 f i gure 2. di p/s o ic p i n configu r ation 1 2 3 4 5 6 7 8 nc = no connect 16 15 14 13 12 11 10 9 nc ro re nc di de v cc a b nc nc gnd nc y z nc adm3491 top view (not to scale) 05234-003 f i g u re 3. t s sop p i n conf ig u r at ion ta ble 5. pi n f u nct i on d e s c ri pt i o ns pin umber dip/ sic tssp nemonic description 1, 8 2, 7, 9, 10, 13, 16 nc no connect. 2 3 ro receiver output. high when a > b by 200 mv; low when a < b by 200 mv. 3 4 re receiver output enable. when re is low, the rec e iv er o utput ro is enabled. when re is high, the output is high impedance. if re is high and de is low, the adm3491 enters a shutdown state. 4 5 de driver output enable. a high le vel ena b les the dr iver differenti a l outputs, y and z. a low level place s the part i n a high impeda n ce state. 5 6 di driver input. when the driver is enabled, a logi c low o n di forces y low and z hig h ; a logic high on di forces y high and z low. 6, 7 8 gnd ground connection, 0 v. 9 11 y noninverting dr iver output y. 10 12 z inverting driver output z. 11 14 b inverting receiver input b. 12 15 a noninverting receiver input a. 13, 14 1 v cc power supply, 3 . 3 v 0.3 v.
adm3491 r e v. a | pa ge 7 o f 1 6 test circuits v cc r/ 2 r/ 2 v oc v od 05234-004 f i gure 4. d r iver v o l t age me asurem ent t e st ci r c u i t 0v or 3v de in de s1 r l c l v out v cc s2 05234-005 f i g u re 5. d r iver e n abl e /d is abl e t e s t c i rcuit di d rl di f f c l1 c l2 v ou t 05234-006 f i gu r e 6 . dri v e r di ffe r en ti al ou tp u t dela y t e st ci r c u i t di rl di f f c l1 c l2 ro re a b r d 05234-007 f i g u re 7. d r iver /r e c eive r p r op ag at i o n d e l a y t e s t c i rcuit r l 375 ? 375 ? v ts t v od 3 05234-008 f i gure 8. d r iver v o l t age me asurem ent t e st ci r c u i t 2 +1 . 5 v ? 1. 5v re in re c l s2 v out v cc s1 r l 05234-009 f i gure 9. r eceive r e n abl e /d isab le t e st circuit de s1 in v cc c l v out r l v om 05234-010 f i g u re 10. d r iver propag at io n d e lay t e s t circuit re 0v 3v v id 1. 5v c l v ou t 05234-011 f i g u re 11. r e c e iver p r op ag at ion d e l a y t e s t ci r c u i t
adm3491 r e v. a | pa ge 8 o f 1 6 switching characteristics 3v 0v z vo y vo 0v ? vo 1/ 2v o 90% point 10% point t r t skew t f 10% point 90% point 1.5v t phl 1.5v t plh t skew 05234-012 f i g u re 12. d r iver propag at io n d e lay , r i s e /f a l l ti m i ng a? b ro 0v t pl h 1. 5 v 0v v oh t ph l v ol 1. 5v 05234-013 f i g u re 13. r e c e iver p r op ag at ion d e l a y re r r 0v 1. 5 v o/p high o/p low t hz v oh ? 0.25v v ol + 0.25v v ol v oh t zh t zl t lz 1.5v 1.5v 1.5v 0v 3v 05234-014 f i g u re 14. d r iver e n abl e /d is abl e ti min g re r r 0v 1. 5v o/p high o/p low t hz v ol v oh t zh t zl t lz 1.5v 1.5v 1.5v 0v 3v v oh ? 0.25v v ol + 0.25v 05234-015 f i g u re 15. r e c e iver e n able /d is abl e ti ming
adm3491 r e v. a | pa ge 9 o f 1 6 typical perf orm ance cha r acte ristics output voltage (v) 14 0 0 3.5 0.5 1 1.5 2 2.5 3 12 8 6 4 2 10 outp ut curre nt (ma) 05234-016 f i gure 16. r e c e iver o u tput l o w v o lt ag e v s . o u tput curren t temperature ( c) ? 4 0 100 ? 2 0 0 20 40 60 80 0.8 0 0.7 0.4 0.3 0.2 0.1 0.6 0.5 i ro = 2.5ma output voltage (v) 05234-017 f i gure 17. r e c e iver o u tput l o w v o lt ag e v s . t e mper ature differential o/p voltage (v) 120 0 0 0.5 1 1.5 2 2.5 3 100 80 60 40 20 outp ut curre nt (ma) 05234-018 f i gur e 1 8 . dri v e r d i ffe r e ntia l ou tput v o l t a g e vs . o u tput c u rrent output high voltage (v) 14 0 04 0.5 1 1.5 2 2.5 3 3.5 12 8 6 4 2 10 outp ut curre nt (ma) 05234-019 f i gure 1 9 . rec e i v er o u tput h i gh v o l t age vs . o u tput c u rr ent temperature ( c) 3.3 3 ?40 100 ? 2 0 0 20 40 60 80 3.25 3.2 3.15 3.1 3.05 output voltage (v) i ro = ? 1.5ma 05234-020 f i gure 20. r e c e iver o u tput high v o lt a g e v s . t e mper ature temperature ( c) 2.6 1.6 ? 4 0 100 ?20 0 20 40 60 80 2.5 2.0 1.9 1.8 1.7 2.3 2.1 2.4 2.2 output voltage (v) 05234-021 f i gure 21. d r iver d i ffer e nti a l o u tput v o ltag e v s . t e mpe r a t ur e
adm3491 rev. a | page 10 of 16 temperature ( c) 1.2 1.1 0.7 ? 4 0 100 ? 2 0 0 20 40 60 80 1 0.9 0.8 s u p p l y curre nt (ma) 05234-022 f i gure 22. sup p l y current v s . t e mper at ur e 3 2 1 t t t 4 t 100f t c abl e ch1 1.00v ch2 1.00v m40.0ns ch3 640mv ch3 2.00v ch4 2.00v [ t ] 05234-023 f i g u re 23. d r iv ing 1 00 f t . cabl e l - h t r a n s i t i o n 3 2 1 t t t 4 t 100ft cat 5 cable ch1 1.00v ch2 1.00v m40.0ns ch3 640mv ch3 2.00v ch4 2.00v [ t ] 05234-024 f i g u re 24. d r iv ing 1 00 f t . cabl e h-l t r a n s i t i o n temperature ( c) 100 0 ?4 0 8 0 ?20 0 20 40 60 90 60 30 20 10 80 70 50 40 s hutdown curre nt (ma) 05234-025 f i gure 25. sh u t do w n cur r ent v s . t e mper atu r e
adm3491 rev. a | page 11 of 16 appli c ations inf ormati o n differential data tr ansmission d i f f e r e n ti al da t a tra n sm i s si o n is used t o r e lia b ly tra n sm i t d a ta a t hig h ra t e s o v er lo n g dis t an ces and t h r o ug h n o is y en v i r o nm en ts. dif f er en tial tran smis sio n n u l l if ies th e ef fe c t s o f g r o u n d s h if ts an d noi s e s i g n a l s , w h i c h a p p e ar a s c o m m on - m o d e volt age s on th e lin e . the tw o ma in sta n da r d s a p p r o v e d b y the e l e c tr o n ics i n d u s t r i e s a s s o ci a t ion (ei a ) sp e c if y t h e e l e c t r ica l cha r ac ter i st ics o f t r a n s c ei v e rs us e d in dif f er en t i al da t a t r an smis si o n : ? rs-422 s t anda r d s p ec if ies da t a ra t e s u p t o 10 mb a u d and lin e len g th s u p to 4000 f t . a sin g le dr i v er ca n dr i v e a tra n smis sio n line wi th u p t o 10 r e cei v ers. ? rs-485 s t anda r d was def i ned to ca t e r t o tr ue m u l t i p o i n t co m m un ica t i o n s . t h i s s t a n d a r d m eet s o r e x ceed s all th e r e q u ir em en ts o f rs-422, b u t als o al lo ws m u l t i p le dr i v ers a nd re c e ive r s to b e c o nne c te d to a s i ng l e b u s . a n e x t e nd e d c o m m on - m o d e r a nge of ? 7 v to + 1 2 v i s d e f i n e d. the m o s t sig n if ica n t dif f er en t i a t o r o f t h e rs-48 5 s t anda r d is t h a t t h e dr i v ers ca n b e dis a b l e d , t h er eb y al lo wing m o r e t h an one t o be connec t e d t o a sin g le lin e . onl y o n e dr i v er s h o u ld be ena b le d a t a t i me, b u t t h e rs -48 5 st anda r d con t a i n s ad di t i o n a l sp e c if ic a t ion s t o gua r a n te e d e vi ce s a fety in t h e e v en t o f line co n t en tion. table 6. co mp arison of rs- 4 2 2 an d rs-4 85 i n terface st a nda rds specification rs-422 rs-485 transmission type differential differential maximum cable length 4000 ft. 4000 ft. minimum driver output voltage 2 v 1.5 v driver load impedance 100 ? 54 ? receiver input resistanc e 4 k? min 12 k? min receiver input sensitivity 200 mv 200 mv receiver input voltage range ?7 v to +7 v ?7 v to +12 v cable and dat a rate the tra n smis sion lin e o f c h oice f o r rs-485 co mm unic a t ion s is a t w ist e d p a ir . t w ist e d p a ir ca b l e t e nds t o can c e l co m m o n - m o d e n o is e an d als o c a us es can c e l l a t i o n o f t h e ma g n et ic f i e l ds g e ner- a t e d b y t h e c u r r en t f l o w in g t h r o ug h e a ch wir e , t h er eb y r e d u cin g th e e f f e cti v e in d u cta n ce o f th e p a i r . the ad m3491 is desig n e d f o r b i dir e c t io nal da ta co mm unica - t i ons on m u lt ip oi n t t r ans m i s s i o n l i ne s . a t y pi c a l a p pl i c a t i o n sh owin g a m u l t i p o i n t t r a n smissi o n n e tw o r k is i l lust ra t e d in f i gur e 26. onl y o n e dr i v er ca n t r a n smi t a t a p a r t ic u l a r t i m e , b u t m u l t i p le r e ce i v e r s ca n be enab le d sim u l t an e o us ly . a s wi t h an y t r an smissio n li ne , i t is im p o r t a n t t h a t r e f l e c t i o n s b e mini mi ze d . thi s ca n b e achi e v e d b y ter m ina t ing t h e ex t r e m e en ds o f t h e li n e usin g r e sis t o r s e q ual t o t h e cha r ac t e r i s t ic im p e dan c e o f th e line . s t u b le ngth s o f th e main lin e sh o u ld al s o be k e p t as sh o r t as p o s s ib le . a p r o p erl y t e r m ina t e d tra n smis sio n lin e a p p e a r s p u r e l y r e sis t i v e t o t h e dr i v er . receiver open-circuit fail-safe feature the r e cei v er i n p u t i n cl udes a f a il-s a f e fe a t ur e t h a t gu a r a n te es a log i c hig h o n t h e r e cei v er w h e n t h e i n p u ts a r e op en cir c ui t o r fl o a t i n g . re v cc ro r a b z y gn d de di a d m 34 91 rs-485/rs-422 link adm3491 gnd re ro di de v cc y z a 3.3v 0.1 f 0.1 f 3.3v b d d r 05234-026 f i g u re 26. a d m 3 49 1 f u ll-d u plex d a t a link table 7. trans m itting truth table transmitting i n p u t s o u t p u t s re d e d i z y x 1 1 0 1 x 1 0 1 0 0 0 x hi-z hi-z 1 0 x h i - z h i - z table 8. r e ceiv ing truth ta bl e receiving i n p u t s o u t p u t s re d e a C b ro 0 x > +0.2 v 0 0 x < ?0.2 v 0 0 x inputs o/ c 1 1 x x h i - z
adm3491 rev. a | page 12 of 16 outline dimensions 14 1 7 8 0. 685 ( 1 7. 40) 0. 665 ( 1 6. 89) 0. 645 ( 1 6. 38) 0.295 (7.49) 0.285 (7.24) 0.275 (6.99) 0.100 (2.54) bsc seating plane 0.180 (4.57) max 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) 0.150 (3.81) 0.130 (3.30) 0.110 (2.79) 0. 060 ( 1 . 52) 0. 050 ( 1 . 27) 0. 045 ( 1 . 14) 0.015 (0.38) 0.010 (0.25) 0.008 (0.20) 0.325 (8.26) 0.310 (7.87) 0.300 (7.62) 0.015 (0.38) min 0.150 (3.81) 0.135 (3.43) 0.120 (3.05) controlling dimensions are in inches; millimeter dimensions (in parentheses) are rounded-off inch equivalents for reference only and are not appropriate for use in design compliant to jedec standards mo-095-ab f i gure 27. 14-l ead p l astic di p (n-14) di me nsio ns sho w n i n i n che s a n d ( m il lim e t e r s) controlling dimensions are in millimeters; inch dimensions (in parentheses) are rounded-off millimeter equivalents for reference only and are not appropriate for use in design coplanarit y 0.10 14 8 7 1 6.20 (0.2441) 5.80 (0.2283) 4.00 (0.1575) 3.80 (0.1496) 8.75 (0.3445) 8.55 (0.3366) 1.27 (0.0500) bsc seating plane 0.25 (0.0098) 0.10 (0.0039) 0.51 (0.0201) 0.31 (0.0122) 1.75 (0.0689) 1.35 (0.0531) 8 0 0.50 (0.0197) 0.25 (0.0098) 1.27 (0.0500) 0.40 (0.0157) 0.25 (0.0098) 0.17 (0.0067) compliant to jedec standards ms-012ab 45 f i gure 28. 14-l ead narro w b o dy s m all o u tlin e (soic ) (r-14) di me nsio ns sho w n i n i n che s a n d ( m il lim e t e r s)
adm3491 rev. a | page 13 of 16 16 9 8 1 pin 1 seating plane 8 0 4.50 4.40 4.30 6.40 bsc 5.10 5.00 4.90 0.65 bsc 0.15 0.05 1.20 max 0.20 0.09 0.75 0.60 0.45 0.30 0.19 coplanarity 0.10 compliant to jedec standards mo-153ab f i g u re 29. 1 6 -l ead thin shr i nk s m a l l o u t line ( t ssop ) (ru - 16) di me nsio ns sho w n i n i n che s a n d ( m il lim e t e r s) ordering guide model temperature r a nge package descri ption package options adm3491an ?40c to +85c 14-lead plastic dip n-14 adm3491ar ?40c to +85c 14-lead narro w body small outline (soic) r-14 adm3491ar- re el ?40c to +85c 14-lead na rrow body small outline (soic) r-14 adm3491ar- re el7 ?40c to +85c 14-lead narrow body small outline (soic) r-14 adm3491arz 1 ?40c to +85c 14-lead narrow bo dy small outline (soic) r-14 adm3491arz-reel 1 ?40c to +85c 14-lead narrow bo dy small outline (soic) r-14 adm3491ar z -r eel7 1 ?40c to +85c 14-lead narrow bo dy small outline (soic) r-14 adm3491aru ?40c to +85c 16-lead thin shrink small outli n e (tssop) ru-16 adm3491aru- r eel ?40c to +85c 16-lead thin shrink small outli n e (tssop) ru-16 adm3491aru- r eel7 ?40c to +85c 16-lead th in shrink small outli n e (tssop) ru-16 adm3491aruz 1 ?40c to +85c 16-lead thin shri nk small outli n e (tssop) ru-16 adm3491aruz- reel 1 ?40c to +85c 16-lead thin shri nk small outli n e (tssop) ru-16 adm3491aruz- reel7 1 ?40c to +85c 16-lead thin shri nk small outli n e (tssop) ru-16 1 z = pb-free part.
adm3491 rev. a | page 14 of 16 notes
adm3491 rev. a | page 15 of 16 notes
adm3491 rev. a | page 16 of 16 notes ? 2004 analo g de vices, inc. all rights reserve d . tra d em arks and registered tra d ema r ks are the prop erty of their respective owners . c05234C0 C 11/04(a)

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