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| low power, high speed rail-to-rail input/output amplifier ad8029/ad8030/ad8040 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 ? 2003 analog de vices, i n c. al l r i ght s r e ser v ed . fea t ures low power 1.3 ma supply current/amplifier high speed 125 mh z, C3 db bandwidth (g = +1) 60 v/s slew ra te 80 ns sett ling ti me to 0.1% rail-to-rail input and output no phase rever s al, inputs 200 mv beyond rai l s wide s u pply ra nge: 2.7 v to 1 2 v offset voltage: 6 mv max low input bias current +0.7 a to C1.5 a small packagin g soic-8, sc70- 6 , sot23-8, soi c -14, tssop-1 4 a pplic a t io ns battery-powered instrum e nta t ion filters a-to -d driver s buffering c o nnec t ion dia g r a ms nc = no connect nc 1 ?in 2 +in 3 ?v s 4 disable +v s v out nc 8 7 6 5 03679-a - 004 v out 1 ?v s 2 +in 3 5 disable 6 +v s 4 ?in +? 03679-a - 002 f i gure 1. soic- 8 (r) f i g u re 2. sc 70- 6 ( k s) v out 1 1 ? in 1 2 +in 1 3 ?v s 4 +v out 2 +v s ? in 2 +in 2 8 7 6 5 03679-a - 003 +v s 4 +in 2 5 ?in 2 6 v out 2 7 +in 3 ?v s ? in 3 v out 3 11 10 9 8 v out 1 1 ?in 1 2 +in 1 3 v out 4 ? in 4 +in 4 14 13 12 03679-a - 001 f i gure 3. soic- 8 (r) and so t23-8 (rj ) f i gure 4. soic- 1 4 (r) and t sso p - 14 (ru) gener a l description the ad8029 (sin g l e), ad8030 ( d ual), an d ad8 040 (q uad) a r e ra il- t o- ra il i n p u t a n d o u t p u t h i g h s p e e d a m p l i f ie r s w i t h a q u ies c en t c u r r en t o f o n l y 1.3 ma p e r a m pl if ier . d e s p i t e t h eir lo w p o w e r co n s um p t ion , t h e am plif iers p r o v ide exce l l en t p e r f o r ma n c e wi th 125 mh z smal l sig n al ban d wid t h and 60 v/s s l e w ra te . ad i s p r o p r i et a r y xfcb p r o c es s ena b les hig h sp e e d an d hig h p e r f o r ma n c e o n lo w p o w e r . this fa m i ly o f a m plif iers exhib i ts t r ue sin g le-sup ply o p era t io n wi t h ra il-t o-ra il in p u t an d o u t p u t p e r f o r ma n c e f o r s u p p l y v o l t a g es ra n g i n g f r o m 2.7 v t o 12 v . the in p u t v o l t a g e ra n g e ext e n d s 200 mv b e yo nd each ra il wi th ou t p h as e r e v e rs al . th e dy nami c r a nge of t h e output e x te nds to w i t h i n 4 0 mv of e a ch ra il . the ad8029/ad8030/ad8040 p r o v ide exce l l en t sig n al q u ali t y wi t h mi nima l p o w e r dissi p a t ion. a t g = +1, s f dr is C72 db c a t 1 mh z and s e t t l i n g tim e t o 0.1% is o n l y 80 n s . l o w dis t o r tion a nd fast s e t t lin g p e r f o r ma n c e mak e t h es e a m pl if iers s u i t a b le dr i v ers fo r sin g l e -s u p p l y a/d c o n v er t e rs. the v e rs a t il i t y o f th e ad8029/ad8030/ad8040 al lo ws th e us er t o o p era t e t h e am plif iers o n a w i de ra n g e o f s u pplies w h i l e co n s umi n g les s t h a n 6.5 mw o f p o w e r . th es e fe a t ur es ext e nd t h e o p era t ion t i m e in a p plic a t ion s ra n g in g f r o m b a t t er y - p o w e r e d sys t ems wi th l a rg e band wid t h r e q u ir e m e n ts t o hig h s p ee d s y s t em s wh e r e co m p o n en t d e n s i t y r e q u ir e s l o w e r po w e r dissi p a t io n. the ad8029/ad8030 a r e the o n l y lo w p o w e r , ra il-t o-rail in p u t a nd o u t p u t h i g h sp e e d am plif iers a v a i la b l e i n s o t23 and sc70 micr o p a cka g es. the am plif iers a r e ra t e d o v er t h e ext e nde d ind u s t r i al t e m p era t ur e ra n g e , C40c t o +125c. time ( s) 03679-a-010 voltage (v) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 1 s/div g = +1 v s = +5v r l = 1k ? tied to midsupply input output f i gur e 5 . ra il -to - r a i l re spo n se
ad8029/ad8030/ad8040 rev. a | page 2 of 20 table of contents specifications..................................................................................... 3 specifications with 5 v supply ................................................. 3 specifications with +5 v supply ................................................. 4 specifications with +3 v supply ................................................. 5 absolute maximum ratings............................................................ 6 maximum power dissipation ..................................................... 6 typical performance characteristics ............................................. 7 theory of operation ...................................................................... 15 input stage................................................................................... 15 output stage................................................................................ 15 applications..................................................................................... 16 wideband operation ................................................................. 16 output loading sensitivity........................................................ 16 disable pin .................................................................................. 17 circuit considerations .............................................................. 18 design tools and technical support ....................................... 18 outline dimensions ....................................................................... 19 ordering guide............................................................................... 20 esd caution................................................................................ 20 revision history revision a 11/03data sheet changed from rev. 0 to rev. a change page added ad8040 part .......................................................universal change to figure 5 ....................................................................... 1 changes to specifications ............................................................ 3 changes to figures 10C12............................................................ 7 change to figure 14 ..................................................................... 8 changes to figures 20 and 21 ..................................................... 9 inserted new figure 36............................................................... 11 change to figure 40 ................................................................... 12 inserted new figure 41............................................................... 12 added output loading sensitivity section ............................. 16 changes to table 5...................................................................... 17 changes to power supply bypassing section .......................... 18 changes to ordering guide ...................................................... 20 ad8029/ad8030/ad8040 rev. a | page 3 of 20 specifications specifications with 5 v supply table 1. v s = 5 v @ t a = 25c, g = +1, r l = 1 k? to ground, unless otherwise noted. all specifications are per amplifier. parameter conditions min typ max unit dynamic performance C3 db bandwidth g = +1, v o = 0.1 v p-p 80 125 mhz g = +1, v o = 2 v p-p 14 19 mhz bandwidth for 0.1 db flatness g = +2, v o = 0.1 v p-p 6 mhz slew rate g = +1, v o = 2 v step 62 v/s g = C1, v o = 2 v step 63 v/s settling time to 0.1% g = +2, v o = 2 v step 80 ns noise/distortion performance spurious free dynamic range (sfdr) f c = 1 mhz, v o = 2 v p-p C74 dbc f c = 5 mhz, v o = 2 v p-p C56 dbc input voltage noise f = 100 khz 16.5 nv/ hz input current noise f = 100 khz 1.1 pa/ hz crosstalk (ad8030/ad8040) f = 5 mhz, v in = 2 v p-p C79 db dc performance input offset voltage pnp active, v cm = 0 v 1.6 5 mv npn active, v cm = 4.5 v 2 6 mv input offset voltage drift t min to t max 30 v/c input bias current 1 npn active, v cm = 4.5 v 0.7 1.3 a t min to t max 1 a pnp active, v cm = 0 v C1.7 C2.8 a t min to t max 2 a input offset current 0.1 0.9 a open-loop gain v o = 4.0 v 65 74 db input characteristics input resistance 6 m? input capacitance 2 pf input common-mode voltage range C5.2 to +5.2 v common-mode rejection ratio v cm = C4.5 v to +3 v, r l = 10 k? 80 90 db disable pin (ad8029) disable low voltage Cv s + 0.8 v disable low current C6.5 a disable high voltage Cv s + 1.2 v disable high current 0.2 a turn-off time 50% of disable to <10% of final v o , v in = C1 v, g = C1 150 ns turn-on time 50% of disable to <10% of final v o , v in = C1 v, g = C1 85 ns output characteristics output overdrive recovery time (rising/falling edge) v in = +6 v to C6 v, g = C1 55/45 ns output voltage swing r l = 1 k? Cv s + 0.22 +v s C 0.22 v r l = 10 k? Cv s + 0.05 +v s C 0.05 v short-circuit current sinking and sourcing 170/160 ma off isolation (ad8029) v in = 0.1 v p-p, f = 1 mhz, disable = low C55 db capacitive load drive 30% overshoot 20 pf power supply operating range 2.7 12 v quiescent current/amplifier 1.4 1.5 ma quiescent current (disabled) disable = low 150 200 a power supply rejection ratio v s 1 v 73 80 db 1 plus, +, (or no sign) indicates current into pin; minus (C) indicates current out of pin. ad8029/ad8030/ad8040 rev. a | page 4 of 20 specifications with +5 v supply table 2. v s = 5 v @ t a = 25c, g = +1, r l = 1 k? to midsupply, unless otherwise noted. all specifications are per amplifier. parameter conditions min typ max unit dynamic performance C3 db bandwidth g = +1, v o = 0.1 v p-p 80 120 mhz g = +1, v o = 2 v p-p 13 18 mhz bandwidth for 0.1 db flatness g = +2, v o = 0.1 v p-p 6 mhz slew rate g = +1, v o = 2 v step 55 v/s g = C1, v o = 2 v step 60 v/s settling time to 0.1% g = +2, v o = 2 v step 82 ns noise/distortion performance spurious free dynamic range (sfdr) f c = 1 mhz, v o = 2 v p-p C73 dbc f c = 5 mhz, v o = 2 v p-p C55 dbc input voltage noise f = 100 khz 16.5 nv/ hz input current noise f = 100 khz 1.1 pa/ hz crosstalk (ad8030/ad8040) f = 5 mhz, v in = 2 v p-p -79 db dc performance input offset voltage pnp active, v cm = 2.5 v 1.4 5 mv npn active, v cm = 4.5 v 1.8 6 mv input offset voltage drift t min to t max 25 v/c input bias current 1 npn active, v cm = 4.5 v 0.8 1.2 a t min to t max 1 a pnp active, v cm = 2.5 v C1.8 C2.8 a t min to t max 2 a input offset current 0.1 0.9 a open-loop gain v o = 1 v to 4 v 65 74 db input characteristics input resistance 6 m? input capacitance 2 pf input common-mode voltage range C0.2 to +5.2 v common-mode rejection ratio v cm = 0.25 v to 2 v, r l = 10 k? 80 90 db disable pin (ad8029) disable low voltage Cv s + 0.8 v disable low current C6.5 a disable high voltage Cv s + 1.2 v disable high current 0.2 a turn-off time 50% of disable to <10% of final v o , v in = C1 v, g = C1 155 ns turn-on time 50% of disable to <10% of final v o , v in = C1 v, g = C1 90 ns output characteristics overdrive recovery time (rising/falling edge) v in = C1 v to +6 v, g = C1 45/50 ns output voltage swing r l = 1 k? Cv s + 0.17 +v s C 0.17 v r l = 10 k? Cv s + 0.04 +v s C 0.04 v short-circuit current sinking and sourcing 95/60 ma off isolation (ad8029) v in = 0.1 v p-p, f = 1 mhz, disable = low C55 db capacitive load drive 30% overshoot 15 pf power supply operating range 2.7 12 v quiescent current/amplifier 1.3 1.5 ma quiescent current (disabled) disable = low 140 200 a power supply rejection ratio v s 1 v 73 80 db 1 plus, +, (or no sign) indicates current into pin; minus (C) indicate s current out of pin. ad8029/ad8030/ad8040 rev. a | page 5 of 20 specifications with +3 v supply table 3. v s = +3 v @ t a = 25c, g = +1, r l = 1 k? to midsupply, unless otherwise note d. all specifications are per amplifier. parameter conditions min typ max unit dynamic performance C3 db bandwidth g = +1, v o = 0.1 v p-p 80 112 mhz g = +1, v o = 2 v p-p 13 18 mhz bandwidth for 0.1 db flatness g = +2, v o = 0.1 v p-p 6 mhz slew rate g = +1, v o = 2 v step 55 v/s g = C1, v o = 2 v step 57 v/s settling time to 0.1% g = +2, v o = 2 v step 110 ns noise/distortion performance spurious free dynamic range (sfdr) f c = 1 mhz, v o = 2 v p-p C72 dbc f c = 5 mhz, v o = 2 v p-p C60 dbc input voltage noise f = 100 khz 16.5 nv/ hz input current noise f = 100 khz 1.1 pa/ hz crosstalk (ad8030/ad8040) f = 5 mhz, v in = 2 v p-p -80 db dc performance input offset voltage pnp active, v cm = 1.5 v 1.1 5 mv npn active, v cm = 2.5 v 1.6 6 mv input offset voltage drift t min to t max 24 v/c input bias current 1 npn active, v cm = 2.5 v 0.7 1.2 a t min to t max 1 a input bias current 1 pnp active, v cm = 1.5 v C1.5 C2.5 a t min to t max 1.6 a input offset current 0.1 0.9 a open-loop gain v o = 0.5 v to 2.5 v 64 73 db input characteristics input resistance 6 m? input capacitance 2 pf input common-mode voltage range C0.2 to +3.2 v common-mode rejection ratio v cm = 0.25 v to 1.25 v, r l = 10 k? 78 88 db disable pin (ad8029) disable low voltage Cv s + 0.8 v disable low current C6.5 a disable high voltage Cv s + 1.2 v disable high current 0.2 a turn-off time 50% of disable to <10% of final v o , v in = C1 v, g = C1 165 ns turn-on time 50% of disable to <10% of final v o , v in = C1 v, g = C1 95 ns output characteristics output overdrive recovery time (rising/falling edge) v in = C1 v to +4 v, g = C1 75/100 ns output voltage swing r l = 1 k? Cv s + 0.09 +v s C 0.09 v r l = 10 k? Cv s + 0.04 +v s C 0.04 v short-circuit current sinking and sourcing 80/40 ma off isolation (ad8029) v in = 0.1 v p-p, f = 1 mhz, disable = low C55 db capacitive load drive 30% overshoot 10 pf power supply operating range 2.7 12 v quiescent current/amplifier 1.3 1.4 ma quiescent current (disabled) disable = low 145 200 a power supply rejection ratio v s 1 v 70 76 db 1 plus, +, (or no sign) indicates current into pin; minus (C) indicate s current out of pin. ad8029/ad8030/ad 8040 r e v. a | pa ge 6 o f 2 0 absolute maximum ra tings table 4. ad80 29/ad8030/a d 8040 stress r a tings p a r a m e t e r r a t i n g supply voltage 12.6 v power dissi pati on see figure 6 common-mode input vol t age v s 0.5 v differential input voltage 1.8 v storage temperature C65c to +125c operating tem p erature range C40c to +125c lead temperature range (sol dering 10 s e c) 300c junction tempe r ature 150c 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 ; f u n c t i o n al o p era t ion o f t h e de vice a t t h es e o r an y o t h e r con d i t io ns a b o v e t h o s e i ndic a te d i n t h e op er a t io na l 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 . ma ximum po wer dissip a tion the maxim u m s a f e p o w e r dis s i p a t io n in t h e ad8029/ad8030/ ad8040 p a c k a g e is limi t e d b y t h e as s o c i a t e d r i s e in j u n c tion t e m p era t ur e (t j ) o n t h e die . the plas t i c e n c a psu l a t i n g t h e di e lo cal l y r e ach e s t h e j u n c t i on t e m p era t ur e . a t a p pr o x ima t e l y 150c, which is th e g l as s tran si tio n t e m p er a t ur e , th e p l as tic cha n g e s i t s p r o p er t i es. e v en t e m p o r a r i l y exce e d in g t h is t e m p era t ur e limi t ma y cha n g e t h e st r e s s es t h a t t h e p a cka g e e x e r t s o n th e d i e , pe rm a n en tl y s h i f ti n g th e pa ra m e tri c p e r f o r ma n c e o f th e ad8029 /ad8030/ad8040. e x ceedin g a j u n c tion t e m p er a t ur e o f 175c fo r a n ext e n d e d p e r i o d can r e su l t in chan ge s in si licon d e vi ces, p o t e n t ia l l y ca usin g fai l ur e . the s t i l l - a i r t h e r mal p r o p er t i es o f t h e p a cka g e and pcb ( ja ), a m b i e n t tem p era t ur e ( t a ), and t h e tot a l p o w e r dissi p a t e d in t h e pa c k a g e ( p d ) de t e r m ine t h e j u nc t i o n t e m p er a t u r e o f t h e die . the j u n c t i on t e m p er a t ur e ca n b e cal c u l a t e d as t j = t a + ( p d ja ) the p o w e r dis s i p a t e d in t h e p a cka g e ( p d ) i s th e s u m o f th e q u ies c en t p o w e r dissi p a t ion and t h e p o w e r dissi p a te d i n t h e p a cka g e d u e t o t h e lo ad dr i v e fo r al l o u t p u t s. th e q u ie s c e n t p o w e r is t h e v o l t a g e b e tw e e n t h e s u p p l y p i n s ( v s ) tim e s t h e q u ies c en t c u r r en t ( i s ). a s s u ming th e lo ad ( r l ) i s re f e re nc e d to midsu p ply , t h e to t a l dr i v e p o w e r is v s /2 i ou t , s o m e o f w h i c h i s dissi p a t e d in t h e p a cka g e an d s o m e in t h e lo ad (v ou t i ou t ). the dif f er ence b e tw e e n t h e t o t a l dr i v e p o w e r and t h e lo ad p o w e r is t h e dr iv e p o w e r dis s i p a t e d i n t h e p a cka g e . p d = qu i e sc e n t p o w e r + ( to t a l d r i v e p o w e r C lo a d p o w e r ) () l out l out s s s d r v r v v i v p 2 C 2 ? ? ? ? ? ? ? ? + = r m s output vo lt age s s h ou l d b e c o ns i d e r e d . i f r l i s re f e re nc e d t o v s C, as in sin g le -s u p pl y o p er a t i o n, t h e n t h e t o t a l dr i v e p o w e r is v s i ou t . i f t h e r m s sig n a l le v e l s a r e in de ter m ina t e , co n s i d er t h e w o rst cas e , when v ou t = v s /4 fo r r l to mi dsupply : () () l s s s d r v i v p 2 4 / + = in s i n g l e - s u p p l y o p e r at i o n w i t h r l re f e re nc e d to v s C, w o rs t cas e is v ou t = v s /2. air f lo w wi l l i n c r e a s e he a t dissi p a t io n, ef fe c t i v ely r e d u cin g ja . a l s o , more m e t a l d i re c t ly i n c o n t a c t w i t h t h e p a ck ag e l e a d s f r o m m e tal tra c e s , th r o ugh h o le s, gr o u n d , a n d p o w e r p l a n e s w i ll re d u c e t h e ja . c a r e m u st b e t a k e n to mi nim i z e p a r a si t i c c a p a ci- t a nces a t t h e in p u t le ads o f hig h sp e e d o p am p s , as dis c uss e d i n th e pcb l a y o u t secti o n . f i gur e 6 sh o w s t h e max i m u m s a fe p o w e r dissi p a t io n in t h e p a cka g e v e rs us t h e am b i e n t t e m p era t ur e fo r t h e so i c -8 (125c/w), so t23-8 (160c/w), so i c -14 (9 0c/w), t sso p - 14 (120 c/w), an d sc7 0 -6 (208c/w) p a c k a g es on a jedec st anda rd 4-l a yer b o a r d . ja val u es a r e a p p r o x ima t ion s . ? 4 0 ? 20 ?10 ?30 0 10 20 30 40 50 60 70 80 90 100 110 120 2.5 m a xim u m pow e r d i ssipa tion ( w ) 1.0 0.5 1.5 2.0 0 ambient temperature ( c) soic-8 tssop-14 soic-14 sot-23-8 sc70-6 03679-a - 018 f i gure 6. m a xi m u m p o wer d i s s i pat i on out p ut short c i rcuit shor t i ng t h e output to g r ou nd or d r a w i n g e x c e ss ive c u r r e n t f r o m th e ad80 29/ad8030 /ad8040 co u l d ca us e ca tas t r o p h ic fa il ur e . ad8029/ad8030/ad 8040 r e v. a | pa ge 7 o f 2 0 typical perf orm ance cha r acte ristics d e fa u l t c o ndi t i o n s: v s = 5 v (t a = 25c, r l = 1 k? tied t o mids u p p l y , unles s oth e r w is e n o t e d . ) frequency (mhz) 0.1 1 1 0 100 1000 ?1 4 ?1 3 ?1 2 ?1 1 ?1 0 ?9 ?8 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 normalize d clos e d -loop gain (db) 03679-0-004 g = +10 r f = 9k ? , r g = 1k ? g = +2 r f = r g = 1k ? g = ? 1 r f = r g = 1k ? v o = 0.1v p-p g = +1 r f = 0 ? f i gur e 7 . sm al l si g n a l f r equenc y resp o n se f o r v a ri o u s g a i n s frequency (mhz) 1 1 0 100 1000 ?8 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 closed-loop gain (db) 03679-0-005 5v +5v +3v g = +1 v o = 0.1v p-p f i g u re 8. s m a l l sig n al f r equenc y r e s p ons e f o r v a r i ous s u p p li es frequency (mhz) 1 1 0 100 ?8 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 closed-loop gain (db) 03679-0-006 5v +5v +3v g = +1 v o = 2v p-p f i g u re 9. la r g e s i g n al f r equenc y r e s p ons e f o r v a r i ous s u p p li es frequency (mhz) 1 1 0 100 ? 0.8 ? 0.7 ? 0.6 ? 0.5 ? 0.4 ? 0.3 ? 0.2 ? 0.1 0 0.1 0.2 normalize d clos e d -loop gain (db) 03679-a-011 dashed lines: v out = 2v p-p solid lines: v out = 0.1v p-p g = +1 g = +2 r f = 1k ? f i g u re 10. 0. 1 db f l at nes s f r eque nc y r e s p ons e frequency (mhz) 1 1 0 100 ?8 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 normalize d clos e d -loop gain (db) 03679-a-012 5v +3v +5v g = +2 v o = 0.1v p-p r f = 1k ? f i g u re 11. sm a ll s i g n al f r equenc y r e s p ons e f o r v a r i ous s u p p l i es frequency (mhz) 1 1 0 100 ?8 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 normalize d clos e d -loop gain (db) 03679-a-013 v s = 5 v s = +3 v s = +5 g = +2 v o = 2v p-p r f = 1k ? f i g u re 12. lar g e s i g n al f r equenc y r e s p ons e f o r v a r i ous s u p p l i es ad8029/ad8030/ad 8040 r e v. a | pa ge 8 o f 2 0 frequency (mhz) 1 1 0 100 1000 ?8 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 2 3 4 5 6 closed-loop gain (db) 03679-0-010 0pf 20pf 10pf 5pf g = +1 v o = 0.1v p-p f i g u re 13. sm a ll s i g n al f r equenc y r e s p ons e f o r v a r i ous c lo a d frequency (mhz) 1 1 0 100 ?8 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 normalize d clos e d -loop gain (db) 03679-a-014 2v p-p 1v p-p 0.1v p-p g = +2 r f = 1k ? f i gur e 1 4 . f r equenc y resp o n se for v a ri o u s o u tput a m p l i t udes 03679-0-054 10 100 1k 10k 100k 1m 10m 100m 1g 80 70 60 225 180 135 90 45 0 50 40 open-loop gain (db) open - l oop ph a se ( d egrees) 30 20 10 0 ?1 0 ?2 0 frequency (hz) f i gure 15. o p en-l oop g a in and phase vs . f r equenc y frequency (mhz) 1 1 0 100 1000 03679-0-013 closed- l oop gain ( d b) ?8 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 2 g = +1 v o = 0.1v p-p v icm = 0v v icm = v s+ ? 0.2v v icm = v s? + 0.2v f i g u re 16. sm a ll s i g n al f r equenc y r e s p ons e f o r v a r i ous input c o mmon-mode v o lt ages frequency (mhz) 1 1 0 100 ?6 ?5 ?4 ?3 ?2 ?1 0 1 2 closed-loop gain (db) 03679-0-014 +125 c +85 c +25 c ?4 0 c g = +1 v o = 0.1v p-p f i g u re 17. sm a ll s i g n al f r equenc y r e s p ons e v s . t e mper at ur e frequency (mhz) 1 1 0 100 ?8 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 closed-loop gain (db) 03679-0-015 +125c +25c +85 c ?40 c g = +1 v o = 2v p-p f i gure 18. lar g e s i gnal f r equenc y r e sponse v s . t e mper atur e ad8029/ad8030/ad 8040 r e v. a | pa ge 9 o f 2 0 frequency (mhz) 03679-0-016 0.01 0.1 10 1 harmonic dis t ortion (dbc ) ? 105 ?95 ?85 ?75 ?65 ?55 ?45 ?35 g = +1 v out = 2v p-p r l = 1k ? second harmonic: solid line third harmonic: dashed line v s = +3v v s = +5v v s = 5v f i gur e 1 9 . ha rm onic di stor ti on vs . f r eque nc y and suppl y v o l t a g e 03679-a-015 harmonic dis t ortion (dbc ) ?8 0 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 ?7 5 ?7 0 ?6 5 ?6 0 ?5 5 ?5 0 ?4 5 ?4 0 output amplitude (v p-p) g = +2 freq = 1mhz r f = 1k ? second harmonic: solid line third harmonic: dashed line v s = +3v v s = +5v v s = +10v f i gur e 2 0 . ha rm onic di stor ti on vs . output a m pli t ude frequency (mhz) 0.01 0.1 1 1 0 harmonic dis t ortion (dbc ) ? 110 ? 100 ?90 ?80 ?70 ?60 ?50 ?40 ?30 03679-a-016 second harmonic: solid line third harmonic: dashed line v s = +5v v out = 2.0v p-p r l = 1k ? r f = 1k ? g = +2 g = +1 g = ? 1 f i gur e 2 1 . ha rm onic di stor ti on vs . f r eque nc y and gai n frequency (mhz) 0.01 0.1 1 1 0 ?110 ?100 ?9 0 ?8 0 ?7 0 ?6 0 ?5 0 ?4 0 03679-0-075 harmonic dis t ortion (dbc ) g = +1 v out = 2v p-p second harmonic: solid line third harmonic: dashed line r l = 1k ? r l = 2k ? r l = 5k ? f i gur e 2 2 . ha rm onic di stor ti on vs . f r eque nc y and l o a d input common-mode voltage (v) 03679-0-020 1.0 1.5 2.0 2.5 3.0 3.5 4.0 harmonic dis t ortion (dbc ) ? 100 ?90 ?80 ?70 ?60 ?50 ?40 g = +1 v out = 2v p-p freq = 1mhz second harmonic: solid line third harmonic: dashed line v s = +3v v s = +5v f i gur e 2 3 . ha rm onic di stor ti on vs . input c o m m o n m o de v o l t a g e frequency (hz) 10 100 1k 10k 100k 1m 10m 1 10 100 1000 0.1 1 10 100 03679-0-069 volta ge n o ise ( n v/ h z ) curre nt nois e (pa/ hz) voltage noise current noise f i gure 24. v o ltage and cu rrent n o is e v s . f r equenc y ad8029/ad8030/ad 8040 rev. a | page 10 of 20 ?100 time (ns) ?75 ?50 ?25 25 0 output voltage (mv) 50 75 100 g = +1 v s = 2.5v 20ns/div 25mv/div 03679-0-022 f i g u re 25. sm a ll s i g n al t r ans i ent r e s p ons e 03679-a - 023 time (ns) output voltage (v) ?2.5 2.5 2.0 1.5 1.0 0.5 0 ?0.5 ?1.0 ?1.5 ?2.0 0.5v/div 25ns/div g = +1 v s = 2.5v 2v p-p 4v p-p f i g u re 26. lar g e s i g n al t r ans i ent r e s p ons e ?4 ?3 ?2 ?1 1 0 2 3 4 g = ? 1 (r f = 1k ? ) r l = 1k ? v s = 2.5v 200ns/div 1v/div 03679-0-024 input output time (ns) output voltage ( v ) f i gure 27. o u tput o v er dr ive r e c o ver y ? 100 ?75 ?50 ?25 25 0 50 75 100 g = +1 v s = 2.5v 20ns/div 25mv/div 03679-0-025 c l = 20pf c l = 5pf c l = 10pf time (ns) output voltage (mv) f i g u re 28. sm a ll s i g n al t r ans i ent r e s p ons e wit h capa cit i ve l oad 03679-0-059 voltage (v) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 time (seconds) 1 s/div g = +1 v s = +5v r l = 1k ? tied to midsupply input output f i g u re 29. ra il- to -r ai l r e s p o n s e , g = + 1 ?4 ?3 ?2 ?1 1 0 2 3 4 g = +1 r l = 1k ? v s = 2.5v 200ns/div 1v/div 03679-0-027 input output time (ns) output voltage (v) f i gure 30. input o v er dr ive r eco ver y ad8029/ad8030/ad 8040 rev. a | page 11 of 20 ? 0.1% +0.1% 500ns/div 03679-0-062 v out ? 2v in (0.1%/div) g = +2 v s = 2.5v + 1v ? 1v v out (500mv/div) f i gure 3 1 . l o ng- t erm s e ttl ing ti me frequency (hz) 1k 10k 100k 1m 10m 100m 1g ?100 ?9 0 ?8 0 ?7 0 ?6 0 ?5 0 ?4 0 ?3 0 ?2 0 03679-0-078 cmrr (db) f i g u re 32. co m m o n -m ode r e jec t ion rat i o v s . f r equenc y 03679-0-055 0.1 1 1 0 100 1000 ?2 0 outp ut (db) ?7 0 ?6 0 ?5 0 ?4 0 ?3 0 ?8 0 frequency (mhz) g = +1 r l = 1k ? disable = low v in = 0.1v p-p f i gur e 3 3 . ad80 29 o ff-iso l a t io n vs . f r eque nc y ? 0.1% +0.1% 20ns/div 03679-0-063 v out ? 2v in (0.1%/div) v out (500mv/div) v in (250mv/div) g = +2 f i g u re 34. 0. 1% sh o r t - t e r m s e t t l ing ti me 1k 10k 100k 1m 10m 100m 1g frequency (hz) ?100 ?9 0 ?8 0 ?7 0 ?6 0 ?5 0 ?4 0 ?3 0 ?2 0 ?1 0 0 p s rr (db) 03679-0-033 +psrr ?psrr fi g u r e 3 5 . p s r r v s . fr e q u e n c y 03679-a - 005 frequency (mhz) cros s t alk (db) 0.01 ?130 1000 0.1 1.0 10 100 ?3 0 ?4 0 ?5 0 ?6 0 ?7 0 ?8 0 ?9 0 ?100 ?110 ?120 drive amp 1k ? 50 ? v in crosstalk = 20log ( v out v in ) listen amp 1k ? v out ad8040 (amp 4 drive amp 1 listen) ad8030 (amp 2 drive amp 1 listen) f i gur e 3 6 . ad80 30 /ad8 04 0 cr o ssta l k v s . f r e q uenc y ad8029/ad8030/ad 8040 rev. a | page 12 of 20 input common-mode voltage (v) ? 1 01234 56789 1 0 1 ?2.5 ?2.0 ?1.5 ?1.0 ?0.5 0 0.5 1.0 1.5 2.0 2.5 03679-0-074 inp u t bias curre nt ( a) 1 v s = +3v v s = +5v v s = +10v f i gure 37. input b i a s current v s . input com m o n-mod e v o ltage temperature ( c) ?40 ? 25 ? 1 0 5 20 35 50 65 80 95 110 125 ? 2.0 ? 1.0 ? 1.2 ? 1.4 ? 1.6 ? 1.8 0 1.0 0.8 0.6 0.4 0.2 03679-0-073 inp u t bias curre nt (p np activ e ) ( a) inp u t bias curre nt (np n activ e ) ( a) v s = +3 v s = +5 v s = 5 npn active pnp active f i gure 38. input b i a s current v s . t e mpe r ature temperature ( c) s u p p l y curre nt (ma) ?40 ? 20 0 2 0 4 0 6 0 8 0 100 120 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 03679-0-067 v s = 5v v s = +5v v s = +3v f i gure 39 q u ies cen t sup p ly cu rrent v s . t e mpe r atu r e input common-mode voltage (v) input offset voltage ( m v) ? 1 0 1 2 345 67 89 1 0 1 ?4 ?3 ?2 ?1 0 1 2 3 4 03679-a-017 1 v s = +3v v s = +5v v s = +10v r l = 1k ? to midsupply g = +1 f i gure 40. input o f f s et v o ltag e v s . inpu t com m o n-mod e v o ltag e 03679-a - 006 temperature (c) in pu t offset volta ge ( m v) ?4 125 ?40 ? 25 ?10 5 20 35 50 65 80 95 110 v s = 5v v s = +5v v s = +3v 4 3 2 1 0 ?1 ?2 ?3 f i gure 41. input o f f s et v o ltag e v s . t e m p er atu r e input offset voltage (mv) frequency ?5 ?4 ? 3 ?2 ? 1 0 1 2 3 4 5 0 20 40 60 80 100 120 03679-0-064 count = 1088 mean = 0.44mv stdev = 1.05mv f i gure 42. input o f f s et v o ltag e d i strib u tion ad8029/ad8030/ad 8040 rev. a | page 13 of 20 03679-0-061 100k 1m 10m 100m 1g outp ut imp e dance ( ? ) 1 10 100 1k 1m 100k 10k frequency (hz) disable = low f i gur e 4 3 . ad80 29 output im p e da nc e vs . f r e q uenc y , di sabl e d load resistance ( ? ) outp ut s a turation v o ltage (v ) 100 1000 10000 ? 0.5 0.5 ? 0.4 ? 0.3 ? 0.2 ? 0.1 0 0.1 0.2 0.3 0.4 v s = +3v v s = +5v v s = 5v v oh ? v s v ol ? v s load resistance tied to midsupply 03679-0-041 f i g u re 44. o u t p ut s a t u r a t i on v o lt ag e v s . l oad r e s i s t an c e temperature ( c) outp ut s a turation v o ltage (mv ) ? 4 0 ? 25 ?10 5 20 35 50 65 80 95 110 125 30 50 70 90 110 130 150 170 03679-0-066 v s = 5v v s = +5v v s = +3v r l = 1k ? tied to midsupply solid line: v s+ ? voh dashed line: vol ? v s? f i g u re 42. o u t p ut s a t u r a t i on v o lt ag e v s . t e mper at ure 03679-0-060 1k 10k 100k 1m 10m 100m 1g outp ut imp e dance ( ? ) 0.1 1 10 100 1000 frequency (hz) g = +1 f i gure 45. o u tput imped a nce v s . f r eq uenc y , e n ab led output voltage (v) ?2.5 ? 2.0 ?1.5 ?1.0 ? 0.5 ? 0 0.5 1.0 1.5 2.0 2.5 ?2.0 ?1.5 ?1.0 ?0.5 0 0.5 1.0 1.5 2.0 03679-0-072 inp u t e rror v o ltage (mv ) r l = 10k ? r l = 1k ? v s = 2.5v f i gure 46. input e r ror v o lt age v s . o u tput v o ltag e ad8029/ad8030/ad 8040 rev. a | page 14 of 20 03679-a-020 0 5 0 100 150 200 250 300 350 1.5 outp ut amp l itude (v ) ?1.0 ?0.5 0 0.5 1.0 ?1.5 time (ns) disable (?0.5v to ?2v) r l = 10k ? r l = 100 ? r l = 1k ? v s = 2.5v g = ? 1 (r f = 1k ? ) output disabled f i gur e 4 7 . ad80 29 disable t u rn- o ff ti mi ng 03679-a-021 0 5 0 100 150 200 250 300 350 1.5 outp ut amp l itude (v ) ? 1.5 ? 1.0 ? 0.5 0 0.5 1.0 time (ns) disable (? 2v to ?0.5v) r l = 100 ? r l = 1k ? r l = 10k ? v s = 2.5v g = ? 1 (r f = 1k ? ) output enabled f i gur e 4 8 . ad80 29 disable t u rn- o n t i ming disable pin voltage (v) v s = +3v, +5v, +10v 01 0.8 1.2 2 3 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 03679-a-022 dis able p i n curre nt ( a) f i gur e 4 9 . ad80 29 disable p i n c u rrent vs. disable pi n v o l t a g e ad8029/ad8030/ad 8040 rev. a | page 15 of 20 theor y of opera tion 03679-0-051 in? in+ r 5 r 6 r 7 r 8 r 1 r 2 r 3 r 4 m top i tail m bot output buffer ?v s r th i th +v s ?1.2v +v s v out q 10 q 11 c mt c mb ?v s ad8029 only to disable circuitry disable q 3 q 4 q 2 q 1 q 9 q 8 q 7 q 6 q 5 out in com spd f i g u re 50. si mpl i f i e d s c h e m a t i c the ad8029 (sin g l e), ad8030 ( d ual), an d ad8 040 (q uad) a r e ra i l -t o-ra i l in put a nd o u t p ut a m plif iers fa b r ica t e d usin g ana l og de vices xfcb p r o c es s. th e xf cb p r o c es s enab les th e ad802 9/ ad8030/ad80 40 t o o p era t e on 2.7 v t o 12 v s u p p lies wi t h a 120 mh z b a n d wid t h and a 60 v/s s l ew ra t e . a sim p lif i e d s c h e - ma tic o f the ad8029/ad8030 /ad8040 is sh o w n in f i gur e 50. inpu t st a g e f o r in p u t co mm on- m o d e v o l t a g es les s t h a n a s e t t h r e sh old (1.2 v be lo w v cc ), t h e r e sisto r dege n e r a te d pnp dif f er en t i a l p a ir (co m p r isin g q 1 to q 4 ) ca r r i es t h e en t i r e i ta i l cu rr e n t , all o w i n g th e in p u t v o l t a g e t o g o 200 mv be lo w Cv s . c o n v e r s e l y , i n p u t co mm o n - m o d e v o l t a g es exce e d in g t h e s a m e t h res h old ca us e i ta i l t o be r o u t e d a w a y f r o m the p n p dif f er en tia l p a ir a nd in t o th e n p n d i f f e r e n tial pa i r th r o ugh tra n si s t o r q 9 . u nder t h is co ndi t i on, t h e i n p u t comm o n - m o d e v o l t a g e is al lo w e d t o r i s e 200 mv abo v e +v s w h i l e st i l l ma in t a in in g li ne a r a m plif ier be ha v i o r . th e tra n si ti o n b e t w een th ese tw o m o d e s o f o p e r a t i o n le ads t o a sudde n, t e m p o r a r y shif t in in pu t st a g e t r a n s c ond u c- ta n c e , g m , an d dc p a ra m e ters (s uch as t h e i n p u t o f fs et v o l t a g e v os ) , w h i c h i n tu r n a d ve r s ely af f e c t t h e d i stor t i on p e r f or m a nc e . t h e s p d b l ock s h o r t e n s t h e d u ra ti o n o f th i s tra n si ti o n , th us i m prov i n g t h e d i stor t i on p e r f or m a n c e. a s s h ow n i n fi g u re 5 0 , t h e i n p u t dif f er en t i al p a ir is p r o t e c t e d b y a p a ir o f tw o s e r i es dio d es, co nn e c te d i n a n t i -p a r al l e l , w h ich clam p t h e dif f er en t i a l i n pu t vo lt ag e to a pprox i m a t el y 1 . 5 v . outpu t st a g e the c u r r en ts de r i ve d f r o m t h e pnp and n p n i n p u t dif f er en t i a l p a irs a r e in j e c t e d in t o t h e c u r r e n t mir r o r s m bo t a nd m top , t h u s es t a b l is hin g a c o mm on- m o d e s i g n al v o l t a g e a t t h e i n p u t o f t h e output bu f f e r . the o u t p u t b u f f er p e r f o r m s t h r e e f u n c t i on s: 1. i t b u f f ers a n d a p p l ies th e desir e d sig n al v o l t a g e t o th e output d e v i c e s , q 10 a nd q 11 . 2. i t s e n s es t h e comm on- m o d e c u r r en t le v e l i n t h e o u t p ut de vices. 3. i t r e gu la t e s t h e o u t p ut co mm on- m o d e c u r r en t b y es t a b l is hin g a c o mm on- m o d e fe e d b a ck lo o p . the o u t p u t d e vi ces q 10 a nd q 11 w o r k i n a co mm o n - e mi t t er co nf igur a t io n, and a r e mi l l er -com p e n s a t e d b y i n ter n a l ca p a c i t o rs, c mt a nd c mb . the o u t p u t v o l t a g e com p liance is s e t b y t h e o u t p u t de vices col l ec t o r r e sis t a n ce r c (a bo u t 25 ?), a n d b y th e r e q u i r ed l o a d cu rr e n t i l . f o r i n st an c e , a lig h t e q ui va le n t lo ad (5 k?) a l lo ws t h e o u t p ut v o l t a g e to swing t o w i t h i n 40 mv o f e i t h er ra i l , w h ile h e a v ier lo ads ca us e t h is f i gur e t o det e r i o r a t e as r c i l . ad8029/ad8030/ad 8040 rev. a | page 16 of 20 appli c a t ions wid e b a nd o p er a t ion +v s ?v s c2 10 f c1 0.1 f c4 0.1 f c3 10 f v out + ? ad8029 r g r1 r f disable v in r1 = r f ||r g 03679-0-052 f i g u re 51. wideb a n d non- inve r t ing g a in conf ig ur at i o n +v s ?v s c1 0.1 f c4 0.1 f c3 10 f r1 v out ? + ad8029 r g r1 = r f ||r g r f v in 03679-0-053 c2 10 f disable f i g u re 52. wideb a n d inve r t ing g a in co nf ig ur at ion o u t p ut l o ad in g sen s i t iv ity t o achi e v e m a x i m u m p e r f o r ma n c e an d lo w p o w e r dissi p a t io n, t h e desig n er n e e d s t o co n s ider t h e lo adi n g a t t h e o u t p ut o f ad8029/ad80 30/ad8040. t a b l e 5 sh o w s th e ef f e c t s o f o u t p u t lo adin g an d p e r f o r ma n c e. w h en o p era t i n g a t uni t y ga i n , t h e ef fe c t i v e lo ad a t t h e a m pl if ier o u t p u t is the r e sis t an ce (r l ) b e i n g dr i v en b y t h e a m plif ier . f o r ga in s o t h e r t h an 1, in n o n i n v er t i n g co nf igura t i o n s , t h e fe e d b a ck n e tw o r k r e p r es e n ts an ad di t i o n a l c u r r en t lo ad a t t h e am plif ier output . t h e f e e d b a c k ne t w or k ( r f + r g ) is in p a ra l l e l w i t h r l , w h ich lo w e rs t h e ef fe c t i v e r e sis t a n c e a t t h e o u t p u t o f t h e a m plif ier . th e l o w e r ef fe c t i v e r e sis t a n ce c a us es t h e am plif ier t o s u p p l y m o r e c u r r en t a t t h e o u t p u t . l o w e r val u es o f fe e d b a ck r e s i s t a n ce in c r ea se th e cu rr e n t d r a w , th u s in c r ea s i n g th e a m plif ier s p o wer dissi p a t ion. f o r exa m ple , if usin g t h e va l u es s h o w n i n t a b l e 5 fo r a ga in o f 2, wi t h r e sis t o r val u es o f 2.5 k?, th e ef fe c t i v e lo ad a t t h e o u t p u t is 1.67 k?. f o r in ver t in g co nf igura t io n s , o n ly t h e fe e d b a ck r e sist o r r f is in p a ra l l e l wi t h t h e o u t p u t lo ad . i f t h e lo ad is g r e a t e r t h a n t h a t sp e c if ie d in t h e d a t a she e t, t h e am plif ier can in t r o d uc e n o n l ine a r i t i es i n i t s op e n -lo o p r e sp o n s e , w h ich in cr e a s e s dis t o r tio n . f i gu r e 53 a nd f i gur e 54 il l u s t ra t e ef f e c t i v e o u t p u t l o a d i n g a n d d i st or t i on p e r f or manc e. inc r e a s i ng t h e re s i st a n c e o f t h e fe e d b a ck n e tw o r k ca n r e d u c e t h e c u r r en t con s um pt io n, b u t h a s o t h e r im p l ica t i o n s . frequency (mhz) harmonic dis t ortion (dbc ) 0.01 ?120 0.1 1.0 10 03679-a - 008 ?4 0 ?5 0 ?6 0 ?7 0 ?8 0 ?9 0 ?100 ?110 v s = 5v v out = 0.1v p-p r l = 5k ? r l = 2.5k ? v s = 5v v out = 2.0v p-p second harmonic ? solid lines third harmonic ? dotted lines r l = 1k ? f i g u re 53. g a in of 1 d i s t o r t i on frequency (mhz) harmonic dis t ortion (dbc ) 0.01 ?120 0.1 1.0 10 03679-a - 009 ?4 0 ?5 0 ?6 0 ?7 0 ?8 0 ?9 0 ?100 ?110 v s = 5v v out = 0.1v p-p r f = r l = 1k ? v s = 5v v out = 2.0v p-p second harmonic ? solid lines third harmonic ? dotted lines r f = r l = 5k ? r f = r l = 2.5k ? f i g u re 54. g a in of 2 d i s t o r t i on ad8029/ad8030/ad 8040 rev. a | page 17 of 20 table 5. ef fect of loa d o n perf ormance noninverting gain r f (k?) r g (k?) r load (k?) C3 db ss bw (mhz) peaking (db) hd2 a t 1 m hz, 2 v p-p (db) hd3 a t 1 m hz, 2 v p-p (db) output noise (nv/hz) 1 0 n / a 1 1 2 0 0 . 0 2 C 8 0 C 7 2 1 6 . 5 1 0 n / a 2 1 3 0 0 . 6 C 8 4 C 8 3 1 6 . 5 1 0 n / a 5 1 3 9 1 C 8 7 . 5 C 9 2 . 5 1 6 . 5 2 1 1 1 3 6 0 C 7 2 C 6 0 3 3 . 5 2 2 . 5 2 . 5 2 . 5 4 4 . 5 0 . 2 C 7 9 C 7 2 . 5 3 4 . 4 2 5 5 5 4 3 2 C 8 4 C 8 6 3 6 C 1 1 1 1 4 0 0 . 0 1 C 6 8 C 5 7 3 3 . 6 C 1 2 . 5 2 . 5 2 . 5 4 0 0 . 0 5 C 7 4 C 6 8 3 4 C 1 5 5 5 3 4 1 C 7 8 C 8 0 3 6 the fe e d b a ck r e sist a n ce ( r f || r g ) co m b i n es w i t h t h e in p u t ca p a c i t a n c e t o fo r m a p o le in t h e a m plif ier s lo op r e sp o n s e . t h is ca n ca us e p e a k i n g an d r i n g i n g i n t h e am plif ier s r e sp o n s e if t h e r c tim e co n s ta n t i s t o o lo w . f i gur e 55 ill u s t ra t e s th i s e f f e ct . p e a k i n g can b e r e d u ce d b y ad di n g a sma l l c a p a ci to r (1 pf C4 pf ) ac ro ss t h e fe e d b a ck re s i stor . the b e st wa y to f i nd t h e op t i m a l val u e o f ca p a c i to r is t o em p i r i c a l l y tr y i t in yo u r cir c ui t. an o t her f a ct o r o f h i gh e r r e s i s t a n ce v a l u es i s th e im pa ct i t h a s o n n o i s e p e r f or m a nc e. hi g h e r re s i stor v a lu e s ge ne r a te m o re noi s e. e a c h a p plic a t ion is u n iq ue an d t h er e f o r e a b a lan c e m u st b e r e ach e d b e t w e e n d i s t or t i on , p e a k i ng , a n d noi s e p e r f or m a nc e. t a bl e 5 out l i n e s t h e t r a d e - of f s t h a t d i f f e r e n t l o a d s h a ve on d i s t or t i on , p e a k i ng, an d n o is e p e r f o r ma n c e. i n ga in s o f 1, 2, a nd 10, e q ui va le n t lo ads o f 1 k?, 2 k?, a nd 5 k? a r e sh o w n. w i t h i n cr e a si n g lo ad r e sist a n c e , t h e di sto r t i o n and C3 db b a ndwi d t h i m pr o v e , w h i l e t h e n o is e an d p e aki n g deg r ade sl ig h t ly . r l = 5k ? frequency (mhz) normalize d clos e d -loop gain (db) 1 ?8 10 100 1000 03679-a - 007 2 1 0 ?1 ?2 ?3 ?4 ?5 ?6 r l = 2.5k ? ?7 r f = r l = 5k ? r f = r l = 2.5k ? r f = r l = 1k ? g = +2 g = +1 r l = 1k ? v s = 5v v out = 0.1v p-p f i gur e 5 5 . f r equenc y resp o n se for v a ri o u s f eedb a ck/ l oad resi sta n c e s disable pi n the ad8029 dis a b l e p i n al lo ws th e am p l if ier t o be sh u t do wn for p o we r c o ns e r v a t i on or m u lt ipl e x i ng a p pl i c a t i o ns . whe n i n th e dis a b l e m o de , th e am p l if ier dra w s onl y 150 a o f q u ies c en t c u r r en t. th e dis a b l e p i n co n t r o l v o l t a g e is r e fer e n c e d t o t h e ne g a t i v e su p p ly . the am pl if ie r e n te rs p o we r - dow n mo de an y ti m e th e d i sa b l e p i n i s ti e d t o t h e m o s t n e ga t i v e s u p p l y o r w i t h in 0.8 v o f t h e n e g a t i v e s u p p l y . i f lef t o p en, t h e am plif ier wi l l o p era t e n o r m al ly . f o r swi t chi n g le v e l s, r e fer t o t a b l e 6. table 6. disable pin co ntrol voltage supply voltage disable pin voltage +3 v +5 v 5 v low (disabled) 0 v to <0.8 v 0 v to <0.8 v C5 v to ad8029/ad8030/ad 8040 rev. a | page 19 of 20 outline dimensions 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.0157) 0.50 (0.0196) 0.25 (0.0099) 45 8 0 1.75 (0.0688) 1.35 (0.0532) seating plane 0.25 (0.0098) 0.10 (0.0040) 4 1 85 5 . 00 ( 0 . 1 968) 4 . 80 ( 0 . 1 890) 4.00 (0.1574) 3.80 (0.1497) 1.27 (0.0500) bsc 6.20 (0.2440) 5.80 (0.2284) 0.51 (0.0201) 0.31 (0.0122) coplanarit y 0.10 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 compliant to jedec standards ms-012aa f i g u re 56. 8-l e ad s t anda r d s m a l l o u t l ine p a ckag e , n a r r ow body [soic ] (r- 8 ) di me nsio ns sho w n i n mi ll im e t e r s a n d (i nc he s) 0. 2 2 0. 0 8 0. 4 6 0. 3 6 0. 2 6 8 4 0 0. 3 0 0. 1 5 1. 00 0. 90 0. 70 sea t i n g pl a n e 1. 10 m a x 3 5 4 2 6 1 2. 00 bs c pin 1 2. 10 b s c 0. 65 b s c 1. 25 b s c 1. 3 0 b s c 0 . 1 0 ma x 0.10 coplanarity compliant to jedec standards mo-203ab f i g u re 57. 6-l e ad p l as t i c su r f ace - m o u n t p a ck ag e [sc 70] ( k s-6) di me nsio ns sho w n i n mi ll im e t e r s 13 5 6 2 8 4 7 2. 9 0 bs c pin 1 1. 6 0 bs c 1. 95 bs c 0. 65 bs c 0. 3 8 0. 2 2 0. 15 m a x 1. 3 0 1. 1 5 0. 9 0 sea t i n g pl a n e 1. 4 5 m a x 0. 22 0. 08 0. 60 0. 45 0. 30 8 4 0 2. 80 b s c compliant to jedec standards mo-178ba f i g u re 58. 8-l e ad s m a l l o u t l i n e t r ans i s t or p a ck ag e [so t 2 3 ] (r j-8) di me nsio ns sho w n i n mi ll im 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 coplanarity 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 59. 14-l ead standar d s m al l o u t line p a ckag e [ s oi c ] ( r -14) di me nsio ns sho w n i n mi ll im e t e r s a n d (i nc he s) 4.50 4.40 4.30 14 8 7 1 6.40 bsc pin 1 5.10 5.00 4.90 0.65 bsc seating plane 0.15 0.05 0.30 0.19 1.20 max 1.05 1.00 0.80 0.20 0.09 8 0 0.75 0.60 0.45 coplanarity 0.10 compliant to jedec standards mo-153ab-1 f i gure 60. 14-l ead thin shrink s m a l l o u tline p a ckage [ t ssop ] (ru-14) di me nsio ns sho w n i n mi ll im e t e r s ad8029/ad8030/ad8040 rev. a | page 20 of 20 ordering guide model minimum ordering quantity temperature rang e package description package option branding ad8029ar 1 C40c to +125c 8-lead soic r-8 ad8029ar-reel 2,500 C40c to +125c 8-lead soic r-8 ad8029ar-reel7 1,000 C40c to +125c 8-lead soic r-8 ad8029aks-r2 250 C40c to +125c 6-lead sc70 ks-6 h6b ad8029aks-reel 10,000 C40c to +125c 6-lead sc70 ks-6 h6b ad8029aks-reel7 3,000 C40c to +125c 6-lead sc70 ks-6 h6b ad8030ar 1 C40c to +125c 8-lead soic r-8 ad8030ar-reel 2,500 C40c to +125c 8-lead soic r-8 ad8030ar-reel7 1,000 C40c to +125c 8-lead soic r-8 ad8030arj-r2 250 C40c to +125c 8-lead sot23-8 rj-8 h7b ad8030arj-reel 10,000 C40c to +125c 8-lead sot23-8 rj-8 h7b ad8030arj-reel7 3,000 C40c to +125c 8-lead sot23-8 rj-8 h7b ad8040ar 1 C40c to +125c 14-lead soic r-14 ad8040ar-reel 2500 C40c to +125c 14-lead soic r-14 AD8040AR-REEL7 1000 C40c to +125c 14-lead soic r-14 ad8040aru 1 C40c to +125c 14-lead tssop ru-14 ad8040aru-reel 2500 C40c to +125c 14-lead tssop ru-14 ad8040aru-reel7 1000 C40c to +125c 14-lead tssop ru-14 esd caution esd (electrostatic discharge) sensitive device. electrostatic charges as high as 4000 v readily accumulate on the human body and test equipment and can discharge without detection. although this product features proprietary esd protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discha rges. therefore, proper esd precautions are recommended to avoid performance degradation or loss of functionality. ? 2003 analog devices, inc. all rights reserved. trademarks and registered trademarks are the prop erty of their respective owners. c03679C0C11/03(a) |
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