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general-purpose comparators ADCMP370/adcmp371 rev. 0 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 . fea t ures 2.25 v t o 5.5 v oper a t ing v o ltage r a nge l o w po w e r c o n s umption (4 a ) o u tput stages adcmp3 70: open- d r a in, high v o ltage (22 v toler a nc e) adcmp3 71: pu sh-pull 50 na input bias curr en t 150 na input o f f s et current 9 mv input off s et v o ltage r a il-t o - r a i l c o mmon-mode input r a nge specified ov er C40c t o +85 c t e mper a t ur e r a nge 5-lea d sc7 0 pa ck age applic a t io ns v o ltage det e c t ors ba tt er y manag e men t sy st em s a/d c o n v er ters l o w v o ltage ap plic a t ions ba tt er y - pow e r e d el ec tr onics p o r t able eq uip m ent gener a l description the ad cmp37 0 /ad c m p 371 a r e g e n e ral-p u r p os e co m p a r a t o r s wi t h in pu t o f fs et v o l t a g es o f 9 mv (max) an d l o w p o wer co n s um p t io n, w h ich ma k e t h e m ide a l fo r b a t t er y - p o w e r e d po r t a b l e eq ui p m en t . the ad cmp37 1 has a p u s h -p u l l o u t p u t s t a g e , w h i l e t h e ad cmp370 has a n o p en-dra in o u t p u t . th e in p u ts o n bo t h p a r t s a n d t h e o u t p u t o n t h e ad cmp370 can t o lera t e v o l t a g es u p t o 22 v , mak i n g t h em s u i t a b l e f o r us e as v o l t a g e det e c t o r s in po r t a b l e eq ui p m en t . the y a r e a v a i l a b l e in s p ace- ef f i cien t 5 - le ad s c 70 p a cka g i n g. func ti on a l bl ock di a g r a ms ADCMP370 gnd out v cc in+ in? 04745-0-001 fi g u r e 1 . gnd out v cc adcmp371 v cc in+ in? 04745-0-002 fi g u r e 2 .
ADCMP370/adcmp371 rev. 0 | page 2 of 12 table of contents specifications ..................................................................................... 3 absolute maximum ratings ............................................................ 4 esd caution .................................................................................. 4 pin configuration and function descriptions ............................. 5 typical performance characteristics ............................................. 6 applications ........................................................................................9 basic comparator ..........................................................................9 adding hysteresis ..........................................................................9 outline dimensions ....................................................................... 11 ordering guide .......................................................................... 11 revision history 10/04revision 0: initial version
ADCMP370/adcmp371 rev. 0 | page 3 of 12 specifications v cc = full operating range, t a = ?40c to +85c, unless otherwise noted. table 1. parameter min typ max unit test conditions/comments supply v cc operating voltage range 2.25 5.5 v supply current 4 7 a common-mode input range 0 v cc v input offset voltage 9 mv v in = v cc /2 input offset voltage average drift 5 v/c v cm = 0 v input bias current 50 na v in = v cc /2 input offset current 150 na v in = v cc /2 out voltage low 0.4 v in+ < in ?, i sink = 1.2 ma out voltage high (adcmp371) 0.8 v cc v in+ > in ?, i source = 500 a out leakage current (ADCMP370) 1 a in+ > in ? , out = 22 v output rise time 30 ns c out = 15 pf output fall time 45 ns c out = 15 pf timing propagation delay 5 s input overdrive = 10 mv 2 s input overdrive = 100 mv
ADCMP370/adcmp371 rev. 0 | page 4 of 1 2 absolute maximum ratings t a = 2 5 c , u n l e ss ot he r w i s e no t e d. table 2. parameter rating v cc ? 0.3 v to +6 v in+, in ? ? 0.3 v to +25 v out (adcmp37 0) ? 0.3 v to +25 v out (adcmp37 1) ? 0. 3 v t o +v cc + 0. 3 v operating tem p erature range ? 40c to +85c storage temperature range ? 65c to +150c ja thermal impedance, sc70 146c/w lead temperature soldering (10 sec) 300c vapor phase (6 0 sec) 215c infrared (15 sec) 220c s t r e s s es a b o v e t h os e list e d u nde r a b s o l u te m a xim u m r a t i n g s ma y ca us e p e r m a n e n t dama ge to t h e de vi ce. t h is is a st r e ss r a t i ng on ly a n d f u nc t i on a l op e r a t i o n of t h e d e v i c e a t t h e s e or 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 ndic a t e d i n 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 pl ie d . e x p o sur e t o a b s o l u te max i m u m r a t i ng co ndi t i on s fo r ex tende d p e r i o d s ma y a f fe c t de vice rel i a b i l i t y . esd caution esd (electrostatic discharge) sensitive device. ele c trosta tic charg e s as high as 4000 v readily accumulate on the human body and test eq uipment and can discharge with out 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.
ADCMP370/adcmp371 rev. 0 | page 5 of 1 2 pin conf iguration and fu nction descriptions in+ 04745-0-003 in? out v cc gnd ADCMP370/ adcmp371 1 3 2 4 5 f i gure 3. pin config ur ation ta ble 3. pi n f u nct i on d e s c ri pt i o ns pin o. neonic description 1 i n + n o n i n v e r t i n g in p u t . 2 g n d g r o u n d . 3 i n C i n v e r t i n g i n p u t . 4 out comparator output. open-drain fo r ADCMP370. push-pull for adcmp371. 5 v cc power supply.
ADCMP370/adcmp371 rev. 0 | page 6 of 1 2 typical perf orm ance cha r acte ristics ?5 0 5 10 15 20 30 cm i/p (v) offset ( m v) 04745-0-006 0 5.5 1.0 1.5 2.0 4.5 5.0 25 3.5 4.0 2.5 3.0 0.5 f i gure 4. input o ffs et vs . c o mmon-mode input v o ltag e 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 10 20 30 40 50 60 70 80 90 100 110 120 130 input overdrive (mv) p r op agation de lay ( s) 04745-0-007 t plh + 125 c t plh +25 c t plh ?4 0 c f i g u re 5. pr op ag at i o n d e lay v s . input o v er dr ive (l o w t o hig h ) 0 1 2 3 4 5 6 10 20 30 40 50 60 70 80 90 100 110 120 130 input overdrive (mv) p r op agation de lay ( s) 04745-0-008 t phl +125 c t phl +25 c t phl ?40 c f i g u re 6. pr op ag at i o n d e lay v s . input o v er dr ive ( h ig h to l o w) 0 0.5 1.0 1.5 2.0 2.5 3.0 ? 4 02 5 8 51 temperature ( c) p r op agation de lay ( s) t phl t plh 2 5 04745-0-013 f i g u re 7. pr op ag at i o n d e lay v s . t e mpe r at ure 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 1 supply voltage (v) +25 c 04745-0-021 s u p p l y curre nt ( a) 5 4 3 2 6 ?40 c +125 c f i gure 8. su p p ly cu rr e n t v s . sup p ly v o l t age (o utput l o w) 0 1.0 2.0 3.0 4.0 1 supply voltage (v) ?40 c +25 c s u p p l y curre nt ( a) 04745-0-015 6 5 4 3 2 +125c 3.5 2.5 1.5 0.5 f i gure 9. su p p ly cu rr e n t v s . sup p ly v o l t age (o utput h i gh)
ADCMP370/adcmp371 rev. 0 | page 7 of 1 2 0 100 200 300 400 500 600 700 800 900 1000 sink current (ma) 04745-0-016 05 3 2 1 ou tpu t low volta g e ( m v) 4 v cc = 3.3v v cc = 5v v cc = 2.25v f i gure 10. o u tput l o w v o ltag e vs. sink c u rrent ? 3.0 ? 2.6 ? 2.2 ? 1.6 ? 1.0 ? 4 0 2 5 125 temperature ( c) offset ( m v) v cc = 5v v cc = 3.3v 04745-0-020 v cc = 2.25v 85 ? 1.2 ? 1.4 ? 1.8 ? 2.0 ? 2.4 ? 2.8 f i gu r e 1 1 . i n pu t o f fse t vs . t e m p er a t ur e 0 50 100 150 200 250 300 ? 5 0 100 150 i out = 2ma i out = 1ma 04745-0-022 output low voltage (mv) 50 0 temperature ( c) f i gure 12. o u tput l o w v o ltag e v s . t e m p er atu r e i bias (na) ? 100 100 300 500 700 900 5.5 5.2 5.4 5.3 04745-0-023 v in (v) v cc = 5.5v 5.1 f i gure 13. input b i a s current v s . input v o ltag e 0.80 0.85 0.90 0.95 2.25 2.75 3.25 3.75 4.25 4.75 5.25 5.50 v cc (v) 04745-0-027 1.05 1.10 1.15 1.20 1.00 h yster esis ( m v) f i g u re 14. h y s t e r es i s v s . sup p ly v o lt ag e 0 1.0 2.0 3.0 ?50 0 50 100 150 temperature ( c) 04745-0-028 h yster esis ( m v) v cc = 5v 0.5 1.5 2.5 f i gu r e 1 5 . hyst er e s is vs . t e m p er a t ur e
ADCMP370/adcmp371 rev. 0 | page 8 of 1 2 04745-0-029 ch1 10mv/div ch2 2.00v/div timebase: 3.00 s/div 1 2 ch1 = (in?) ? in+ ch2 = out f i g u re 16. p r opag a t ion d e l a y tim i ng 10 mv o v er d r ive 04745-0-030 ch1 100mv/div timebase: 1.00 s/div 1 2 ch2 2.00v/div ch2 = out ch1 = (in? ) ? in+ f i g u re 17. p r opag a t ion d e l a y tim i ng 10 0 mv o v e r dr ive
ADCMP370/adcmp371 rev. 0 | page 9 of 1 2 appli c ations basic com p arator i n i t s m o st b a si c co nf igur a t io n, a co m p a r a t o r c a n b e us e d to co n v er t a n a n a l og in p u t sig n a l to a dig i t a l o u t p u t sig n a l . th e a n alog sig n al o n in+ is com p a r ed t o the v o l t ag e o n in? an d t h e v o l t a g e a t o u t is ei t h er hig h o r lo w , dep e ndin g o n w h et h e r in+ is a t a hig h er o r lo w e r p o t e n t ial than in?, r e s p ec ti ve l y . the ad cmp37 0 a nd ad cm p 371 ha v e dif f er en t dig i tal o u t p u t s t r u c t ur es. th e ad cmp370 has a n o p en-dra in o u t p u t s t a g e w h i c h re qu i r e s an e x te r n a l re s i s t or to pu l l o u t to t h e l o g i c h i g h vo lt age l e v e l w h e n t h e output t r ans i stor i s s w itc h e d of f . this v o l t a g e leve l can be as hig h as 22 v . the s a m e 22 v t o lera n c e a p plie s als o t o t h e in pu ts o f t h e co m p a r a t o r s. th e pu l l - u p re s i stor shou l d b e l a r g e e n ou g h to a v oi d e x c e ss ive p o w e r diss i p a t i o n, b u t sma l l e n o u g h to s w i t ch l o g i c le vels re a s on ably qu i c k l y w h e n t h e c o m p ar a t or output i s c o n n e c t e d t o o t h e r dig i t a l circ ui t r y . a sui t a b l e va l u e w o u l d b e b e tw e e n 1 k ? and 10 k ? . the a d c m p 3 71 h a s a p u sh - p u l l o u tp u t st age, w h i c h has a n i n t e r n al pmos p u l l -u p a nd t h er efo r e do esn t r e q u ir e an e x te r n a l re s i stor . f a ste r s w i t ch ing sp e e d s b e twe e n l o w and hig h ra ils a r e p o s s i b l e , b u t t h e log i c hig h l e v e l is limi t e d t o v cc . adm331 out v+ v ref t v out 0v ADCMP370 v cc v+ v in 04745-0-017 v ref v in f i gur e 1 8 . ba s i c com p ar at o r and input a n d output si gnal s adding hysteresis t o pre v e n t o s c i l l a t i o ns a t t h e output c a u s e d b y noi s e or sl ow ly m o vin g sig n als p a s s in g t h e s w i t c h in g t h r e sh old, p o si ti v e fe e d b a ck can b e us e d t o add h y s t er esis t o t h e dif f er en t i al in pu t. f o r t h e n o ni n v e r t i n g co nf igur a t io n, sh o w n i n f i gur e 19, tw o r e sis t o r s a r e us e d t o cr e a te dif f er en t s w i t chin g t h r e s h olds, dep e ndi n g o n w h et h e r t h e i n p u t sig n a l is i n cr e a sin g o r de cr e a sin g i n ma g n i t ude . w h en t h e in p u t v o l t ag e is in cr e a s i n g , th e th r e sh o l d i s a b o v e v ref ; a nd w h en i t s de cr e a sin g , t h e th r e s h o l d i s b e lo w v ref . the u p p e r in put t h r e sh old le ve l is g i v e n b y r2 r1 v r2 r1 cc ref in_hi v v the lo w e r in p u t thr e s h ol d le ve l is g i v e n b y r2 r2 r1 ref in_lo v v the h y s t er esis is t h e dif f er en c e b e tw e e n t h es e vol t a g e le ve ls and is g i v e n b y r2 r1 cc in v v ' i n t h e exam ple i n f i gur e 19, r e si s t o r s r1 an d r2 a r e ch os e n t o g i v e 1 v h y s t er esis a b o u t t h e r e fer e n c e o f 2.5 v , wi t h v cc = 5 v . it s i m p o r t a n t t h a t r pul l -up << r lo ad s o tha t t h e ou t p u t hig h vol t age i s n t pu l l e d b e l o w v cc . adm331 out adcm p 3 7 0 v cc = 5v r pullup = 5k : r load r2 = 1m : r1 = 200k : v ref = 2.5v in+ in? v in v out v in v in_lo = 2v v in_hi = 3v 04745-0-018 f i gur e 1 9 . nonin v er ti ng c o m p ar at or c o nfigur ation with hysteresis w i t h t h e i n ver t i n g co nf igur a t ion, t h e u p p e r and lo w e r swi t c h in g thr e sh olds a r e r2 r3 r1 r2 || v v cc in_hi r3 r2 r1 r3 r2 || || v v cc in_lo
ADCMP370/adcmp371 rev. 0 | page 10 of 12 out v cc = 5v adcmp371 v cc in+ in? 04745-0-019 v out v in v in_lo = 1.67v v in_hi = 3.33v v cc v cc r3 r1 r2 v in_hi v in_lo r1 r3 r2 r load r2 = 1m ? r3 = 1m ? r1 = 1m ? v in v out high: v out low: f i gur e 2 0 . nonin v er ti ng c o m p ar at or c o nfigur ation with hysteresis
ADCMP370/adcmp371 rev. 0 | page 11 of 12 outline dimensions compliant to jedec standards mo-203aa 2. 0 0 bs c 0. 30 0. 15 0 . 1 0 m a x 1. 0 0 0. 9 0 0. 7 0 sea t i n g p l ane 1. 10 m a x 0. 22 0. 08 0. 4 6 0. 3 6 0. 2 6 4 5 12 3 pin 1 2. 10 b s c 0. 65 bs c 1. 2 5 bs c 0.10 coplanarity f i g u re 21. 5-l e ad t h in s h ri nk s m a ll o u t lin e t r ans i s t o r p a ck ag e [ s c 7 0] (k s-5) di me nsio ns sho w n i n mi ll im e t e r s ordering guide m o d e l t e m p e r a t u r e r a nge package descri ption package option branding ADCMP370aks- r eel ?40c to +85c 5-lead sc70 ks-5 m1f ADCMP370aks- r eel7 ?40c to +85c 5-lead sc70 ks-5 m1f adcmp371aks- r eel ?40c to +85c 5-lead sc70 ks-5 m1g adcmp371aks- r eel7 ?40c to +85c 5-lead sc70 ks-5 m1g
ADCMP370/adcmp371 rev. 0 | page 12 of 12 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 . d04745-0-10/04(0)

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