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low cost, high speed rail-to-rail amplifiers ad8091/ad8092 rev. b 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 . specifications subjec t to chan 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. 461. 31 13 ? 2005 analog de vices, i n c. al l r i ght s r e ser v ed . features low cost single (ad8 091), du a l (ad 8092 ) am plifiers fully specified at +3 v, +5 v, a n d 5 v s u pplies single-supply operation output swings to within 25 m v of either r a il high-speed an d fast settling on 5 v 110 mh z, ? 3 d b bandwidth ( g = +1) 145 v/s s l ew r a te 50 ns sett ling ti me to 0.1% good video sp ecifications (g = +2) gain flatn e ss o f 0.1 db to 20 m hz; r l = 150 ? 0.03% differen t ial gain error; r l = 1 k? 0.03 differ e nti a l phase error; r l = 1 k? low d istortion ?80 dbc total harmonic @ 1 m hz; r l = 100 ? outstanding load dri v e capabi lity drives 45 m a , 0.5 v from sup p ly rails drives 50 pf ca pacitive lo ad ( g = +1) low power of 4.4 ma/amplifie r applic ati o ns coaxial cable d r ivers active fi lters video switcher s professional cameras ccd imaging s y stems cds/dv ds connection diagram s 02859-001 nc = no connect ad8091 nc 1 ?in 2 +in 3 ? v s 4 nc +v s v out nc 8 7 6 5 f i g u r e 1 . s o i c -8 ( r -8 ) 02859-003 ad8091 v out 1 ?v s 2 +in 3 +v s 5 ?i n 4 f i g u re 2. so t2 3-5 (rt - 5) 02859-002 nc = no connect ad8092 out1 1 ?in1 2 +in1 3 ?v s 4 +v s out ?in2 +in2 8 7 6 5 f i g u re 3. m s o p - 8 a n d soic-8 (r m - 8, r - 8) general description the ad8091 (sin g l e) a nd ad80 92 (d ual) a r e lo w cos t , v o l t a g e f eed ba ck , h i g h s p eed a m p l i f i e r s d e s i gn ed t o o p era t e o n +3 v , +5 v , o r 5 v s u p p lies. the y ha v e tr ue sin g le -su p p l y ca p a b i li ty , wi th an in p u t v o l t a g e ra n g e extending 200 mv b e lo w t h e n e ga ti v e ra il a n d wi thi n 1 v o f th e posi ti v e ra il. des p i t e t h eir lo w cos t , t h e ad8 091/ad8092 p r o v ide exce l l en t o v eral l p e r f o r ma n c e and v e rs a t i l i t y . th e o u t p ut v o l t a g e s w ing ex ten d s to w i t h i n 25 mv o f e a ch ra i l , p r o v id in g t h e max i m u m o u t p ut d y namic ra n g e w i t h exc e l l en t o v er dr i v e r e co v e r y . this mak e s t h e ad8 091/ad8092 us ef u l f o r video e l ec tr o n ics, s u c h as cam e ras, v i de o swi t ch ers, o r an y hig h sp e e d p o r t a b le eq ui p m en t . lo w d i s t o r ti o n a n d fa s t set t l i n g mak e t h em i d e a l f o r ac t i v e f i l t er a p pl ica t io n s . the ad8091 /ad8092 o f f e r a lo w p o w e r s u p p l y c u r r en t a nd c a n o p era t e on a si ng le 3 v p o w e r su p p l y . th es e fe a t ur es a r e ide a l l y s u i t e d fo r p o r t a b le a nd b a t t e r y -p o w er e d a p pli c a t io n s w h er e size a nd p o w e r a r e c r i t ica l . the wide b a n d wid t h an d fas t sle w ra te make t h es e a m pl if iers us ef u l in man y gen e ra l - p u r p os e , hig h sp e e d a pplica t ion s w h ere d u al p o w e r su p p l ies o f u p t o 6 v a nd sing le s u p p lies f r o m +3 v t o +12 v a r e n e e d e d . this lo w cost p e r f o r ma n c e is o f f e r e d in an 8-l e a d soi c (ad8091/ad80 92), alo n g wi th a tin y sot23-5 (ad8091) a nd a mso p (ad809 2).
a8091/ad8092 rev. b | page 2 of 20 table of contents specifications ..................................................................................... 3 absolute maximum ratings ............................................................ 7 maximum power dissipation ..................................................... 7 esd caution .................................................................................. 7 typical performance characteristics ............................................. 9 layout, grounding, and bypassing considerations .................. 13 power supply bypassing ............................................................ 13 grounding ................................................................................... 13 input capacitance ....................................................................... 13 input-to-output coupling ........................................................ 13 driving capacitive loads .............................................................. 14 overdrive recovery ................................................................... 14 active filters ............................................................................... 14 sync stripper ............................................................................... 15 single-supply composite video line driver ......................... 15 outline dimensions ....................................................................... 17 ordering guide .......................................................................... 18 revision history 3/05rev. a to rev. b changes to format .............................................................universal changes to features.......................................................................... 1 updated outline dimensions ....................................................... 17 changes to ordering guide .......................................................... 18 5/02Crev. 0 to rev. a edits to product description ...........................................................1 edit to tpc 6 .....................................................................................7 edits to tpcs 21C24........................................................................10 edits to figure 3 ...............................................................................11 2/02revision 0: initial version
ad8091/ad8092 rev. b | page 3 of 20 specifications t a = 25c, v s = 5 v, r l = 2 k? to 2.5 v, unless otherwise noted. table 1. ad8091a/ad8092a parameter conditions min typ max unit dynamic performance ?3 db small signal bandwidth g = +1, v o = 0.2 v p-p 70 110 mhz g = ?1, +2, v o = 0.2 v p-p 50 mhz bandwidth for 0.1 db flatness g = +2, v o = 0.2 v p-p, r l = 150 ? to 2.5 v, r f = 806 ? 20 mhz slew rate g = ?1, v o = 2 v step 100 145 v/s full power response g = +1, v o = 2 v p-p 35 mhz settling time to 0.1% g = ?1, v o = 2 v step 50 ns noise/distortion performance total harmonic distortion (see figure 11) f c = 5 mhz, v o = 2 v p-p, g = +2 ?67 db input voltage noise f = 10 khz 16 nv/hz input current noise f = 10 khz 850 fa/hz differential gain error (ntsc) g = +2, r l = 150 ? to 2.5 v 0.09 % r l = 1 k? to 2.5 v 0.03 % differential phase error (ntsc) g = +2, r l = 150 ? to 2.5 v 0.19 degrees r l = 1 k? to 2.5 v 0.03 degrees crosstalk f = 5 mhz, g = +2 ?60 db dc performance input offset voltage 1.7 10 mv t min to t max 25 mv offset drift 10 v/c input bias current 1.4 2.5 a t min to t max 3.25 a input offset current 0.1 0.75 a open-loop gain r l = 2 k? to 2.5 v 86 98 db t min to t max 96 db r l = 150 ? to 2.5 v 76 82 db t min to t max 78 db input characteristics input resistance 290 k? input capacitance 1.4 pf input common-mode voltage range ?0.2 to +4 v common-mode rejection ratio v cm = 0 v to 3.5 v 72 88 db output characteristics output voltage swing r l = 10 k? to 2.5 v 0.015 to 4.985 v r l = 2 k? to 2.5 v 0.100 to 4.900 0.025 to 4.975 v r l = 150 ? to 2.5 v 0.300 to 4.625 0.200 to 4.800 v output current v out = 0.5 v to 4.5 v 45 ma t min to t max 45 ma short-circuit current sourcing 80 ma sinking 130 ma capacitive load drive g = +1 50 pf power supply operating range 3 12 v quiescent current/amplifier 4.4 5 ma power supply rejection ratio ?v s = 1 v 70 80 db operating temperature range ?40 +85 c
a8091/ad8092 rev. b | page 4 of 20 t a = 25c, v s = +3 v, r l = 2 k? to +1.5 v, unless otherwise noted. table 2. ad8091a/ad8092a parameter conditions min typ max unit dynamic performance ?3 db small signal bandwidth g = +1, v o = 0.2 v p-p 70 110 mhz g = ?1, +2, v o = 0.2 v p-p 50 mhz bandwidth for 0.1 db flatness g = +2, v o = 0.2 v p-p, r l = 150 ? to 2.5 v, r f = 402 ? 17 mhz slew rate g = ?1, v o = 2 v step 90 135 v/s full power response g = +1, v o = 1 v p-p 65 mhz settling time to 0.1% g = ?1, v o = 2 v step 55 ns noise/distortion performance total harmonic distortion (see figure 11) f c = 5 mhz, v o = 2 v p-p, g = ?1, r l = 100 ? to 1.5 v ?47 db input voltage noise f = 10 khz 16 nv/hz input current noise f = 10 khz 600 fa/hz differential gain error (ntsc) g = +2, v cm = 1 v r l = 150 ? to 1.5 v 0.11 % r l = 1 k? to 1.5 v 0.09 % differential phase error (ntsc) g = +2, v cm = 1 v r l = 150 ? to 1.5 v 0.24 degrees r l = 1 k? to 1.5 v 0.10 degrees crosstalk f = 5 mhz, g = +2 ?60 db dc performance input offset voltage 1.6 10 mv t min to t max 25 mv offset drift 10 v/c input bias current 1.3 2.6 a t min to t max 3.25 a input offset current 0.15 0.8 a open-loop gain r l = 2 k? 80 96 db t min to t max 94 db r l = 150 ? 74 82 db t min to t max 76 db input characteristics input resistance 290 k? input capacitance 1.4 pf input common-mode voltage range ?0.2 to +2.0 v common-mode rejection ratio v cm = 0 v to 1.5 v 72 88 db output characteristics output voltage swing r l = 10 k? to 1.5 v 0.01 to 2.99 v r l = 2 k? to 1.5 v 0.075 to 2.9 0.02 to 2.98 v r l = 150 ? to 1.5 v 0.20 to 2.75 0.125 to 2.875 v output current v out = 0.5 v to 2.5 v 45 ma t min to t max 45 ma short circuit current sourcing 60 ma sinking 90 ma capacitive load drive g = +1 45 pf
ad8091/ad8092 rev. b | page 5 of 20 ad8091a/ad8092a parameter conditions min typ max unit power supply operating range 3 12 v quiescent current/amplifier 4.2 4.8 ma power supply rejection ratio ?v s = +0.5 v 68 80 db operating temperature range ?40 +85 c
a8091/ad8092 rev. b | page 6 of 20 t a = 25c, v s = 5 v, r l = 2 k? to ground, unless otherwise noted. table 3. ad8091a/ad8092a parameter conditions min typ max unit dynamic performance ?3 db small signal bandwidth g = +1, v o = 0.2 v p-p 70 110 mhz g = ?1, +2, v o = 0.2 v p-p 50 mhz bandwidth for 0.1 db flatness g = +2, v o = 0.2 v p-p, r l = 150 ?, r f = 1.1 k? 20 mhz slew rate g = ?1, v o = 2 v step 105 170 v/s full power response g = +1, v o = 2 v p-p 40 mhz settling time to 0.1% g = ?1, v o = 2 v step 50 ns noise/distortion performance total harmonic distortion f c = 5 mhz, v o = 2 v p-p, g = +2 ?71 db input voltage noise f = 10 khz 16 nv/hz input current noise f = 10 khz 900 fa/hz differential gain error (ntsc) g = +2, r l = 150 ? 0.02 % r l = 1 k? 0.02 % differential phase error (ntsc) g = +2, r l = 150 ? 0.11 degrees r l = 1 k? 0.02 degrees crosstalk f = 5 mhz, g = +2 ?60 db dc performance input offset voltage 1.8 11 mv t min to t max 27 mv offset drift 10 v/c input bias current 1.4 2.6 a t min to t max 3.5 a input offset current 0.1 0.75 a open-loop gain r l = 2 k? 88 96 db t min to t max 96 db r l = 150 ? 78 82 db t min to t max 80 db input characteristics input resistance 290 k? input capacitance 1.4 pf input common-mode voltage range ?5.2 to +4.0 v common-mode rejection ratio v cm = ?5 v to +3.5 v 72 88 db output characteristics output voltage swing r l = 10 k? ?4.98 to +4.98 v r l = 2 k? ?4.85 to +4.85 ?4.97 to +4.97 v r l = 150 ? ?4.45 to +4.30 ?4.60 to +4.60 v output current v out = ?4.5 v to +4.5 v 45 ma t min to t max 45 ma short circuit current sourcing 100 ma sinking 160 ma capacitive load drive g = +1 (ad8091/ad8092) 50 pf power supply operating range 3 12 v quiescent current/amplifier 4.8 5.5 ma power supply rejection ratio ?v s = 1 v 68 80 db operating temperature range ?40 +85 c
ad8091/ad8092 r e v. b | pa ge 7 o f 2 0 absolute maximum ratings table 4. 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 4 common-mode input vol t age v s differential input voltage 2.5 v output short-ci rcuit duration see figure 4 storage temperature range ?65c to +125c operating temperature range ?40c to +85c lead temperature range (soldering 10 sec) 300c 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 xi m 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 ; f u n c t i on a l op e r at i o n of t h e d e v i c e a t t h e s e or an y o t h e r con d i t ions 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 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 . maximum power dissipation 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 ad8091/ad8092 p a cka g e is l i mi te d b y t h e as s o c i a t e d r i s e i n j u n c t i o n t e m p er a t ure (t j ) o n th e d i e . t h e p l a s ti c e n ca p s ul a t i n g th e d i e l o c a ll y r e a c h e s t h e j u n c t i o n t e m p era t ur e . a t a p p r o x ima t e l y 1 50c, w h ich is t h e gla s s tra n si ti o n t e m p e r a t ur e , t h e p l a s ti c c h a n g e s i t s p r o p e r ti e s . 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 li mi t ma y cha n g e t h e s t r e s s es t h a t t h e p a cka g e exer ts o n t h e di e , p e r m a n e n t l y s h if tin g t h e p a r a m e tr ic p e r f o r ma n c e o f the ad8091/ad8092. e x ceedin g a j u nc tio n t e m p er a t u r e o f 175c f o r a n ext e n d e d p e r i o d o f t i me c a n r e su l t i n chan ges in t h e si lic o n de vi ces, po t e n t iall y ca usi n g fa il ur e . th e s t i l l-a i r t h ermal p r o p e r t i es o f t h e packa g e ( ja ), a m b i en t t e m p era t ur e (t a ), a n d th e t o ta l po w e r d i s s i p a t ed i n th e pa c k a g e (p d ) ca n b e us e d t o det e r m in e t h e j u n c t i o n t e m p era t ur e o f t h e die . the j u n c t i on t e m p era t ur e ca n b e calc u l a t e d as ( ) ja d a j p t t + = the p o wer dis s i p a t e d in t h e p a cka g e (p d ) is t h e s u m o f t h e q u ies c e n 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 quies 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 i e scen t curr 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 mids u p pl y , t h en t h e t o 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 ich is diss i p a t e d i n t h e p a ckage a nd s o m e in t h e lo a d (v ou t i out ). th e dif f er en ce 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 i s t h e dr i v e p o wer dis s i p a t e d in t h e p a cka g e . ( ) power load power drive total power quiescent p d ? + = () ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? + = l out l out s s s d r v r v v i v p 2 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? , as in si n g le -s u p ply o p era t i o n, t h en t h e t o t a l dr i v e p o w e r i s v s i ou t . i f t h e r m s sig n a l le v e ls a r e i ndeter mina t e , t h e n co n s ider t h e worst c a s e , w h e n v ou t = v s /4 fo r r l to midsupply () 2 4 l s s s d r v i v p ? ? ? ? ? ? + = 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? , w o rs t cas e is v ou t = v s /2. esd caution esd (electrostatic discharge) se nsit ive device . electrostatic charges as hig h as 4000 v readily accumulate on the human bod y and test eq uipment and can discharge wi thout detection. although this product features proprietary esd protection circ uitry, permanent dama ge may occur on devices subjected to high energy electrostatic discharges. theref ore, pro p er esd prec autions are recommended to avoid perfor mance degrada - tion or los s of functional ity.
a8091/ad 8092 r e v. b | pa ge 8 o f 2 0 air f lo w in cr e a s e s h e a t di ssi p a t i o n, ef fe c t i v e l y r e d u cing ja . als o , more me 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 age l e a d s f rom m e t a l t r aces, t h r o u g h h o les, g r o u nd , an d p o w e r p l a n es r e d u ces th e ja . ca r e m u s t b e tak e n t o minimize p a rasi tic ca p a ci tan c es a t t h e in p u t leads o f hig h sp eed o p a m ps as dis c us s e d in t h e boa r d la y o u t se cti o n . f i gur e 4 sh o w s t h e maxim u m s a fe p o w e r dis s i p a t io n in t h e p a cka g e vs. t h e a m b i e n t t e m p era t ur e fo r t h e so i c -8 (125c/w), sot23-5 (180c/w), and mso p -8 (150c/w) on a jed e c s t anda rd fo ur -l a y er bo a r d . 2.0 0 0.5 1.0 1.5 ? 4 0 ? 3 0 ? 2 0 ? 1 0 0 1 02 03 0 4 05 06 0 7 08 09 0 02859-004 ambient temperature ( c) m a xim u m pow e r d i ssipa tion ( w ) t j = 150 c msop-8 soic-8 sot23-5 f i gure 4. m a xi m u m p o wer d i s s i pat i on v s . t e m p er at ure f o r a f o ur -l ayer b o ar d
ad8091/ad8092 r e v. b | pa ge 9 o f 2 0 typical perf orm ance cha r acte ristics 3 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 2 0.1 1 1 0 100 500 02859-005 frequency (mhz) normalize d gain (db) v s = 5v gain as shown r f as shown r l = 2k ? v o = 0.2v p-p g = +1 r f = 0 ? g = +5 r f = 2k ? g = +2 r f = 2k ? g = +10 r f = 2k ? f i g u re 5. n o r m al ized g a in v s . f r eque nc y ; v s = + 5 v 3 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 2 0.1 1 1 0 100 500 02859-006 frequency (mhz) gain ( d b) v s as shown g = +1 r l = 2k ? v o = 0.2v p-p v s = +3v v s = +5v v s = 5v fi g u r e 6 . g a i n v s . fr e q u e n c y v s . s u p p l y 3 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 2 0.1 1 1 0 100 500 02859-007 frequency (mhz) gain ( d b) v s = 5v g = +1 r l = 2k ? v o = 0.2v p-p temperature as shown ?40 c +85 c +25 c fi g u r e 7 . g a i n v s . fr e q u e n c y v s . t e m p e r a t u r e 6.3 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6.0 6.1 6.2 0.1 1 1 0 100 02859-008 frequency (mhz) ga in fla tn ess ( d b ) v s = 5v g = +2 r l = 150k ? r f = 806 ? v o = 0.2v p-p f i g u re 8. 0.1 db g a i n f l at n e s s v s . f r equ e nc y ; g = + 2 9 ?1 0 1 2 3 4 5 6 7 8 0.1 1 1 0 100 500 02859-009 frequency (mhz) gain ( d b) v s as shown g = +2 r l = 2k ? r f = 2k ? v o as shown v s = +5v v o = 2v p-p v s = 5v v o = 4v p-p fi g u r e 9 . l a r g e s i g n a l fr e q u e n c y r e s p o n s e ; g = + 2 70 ?20 ?10 0 10 ?180 ?135 ?90 ?45 0 20 30 40 50 60 0.1 1 1 0 100 500 02859-010 frequency (mhz) open- l oop gain ( d b) ph a se ( d egrees) phase gain 50 phase margin v s = 5v r l = 2k ? f i gure 10. o p en-l oop g a in and phase vs . f r equenc y
a8091/ad 8092 rev. b | page 10 of 20 ?2 0 ?110 ?100 ?9 0 ?8 0 ?7 0 ?6 0 ?5 0 ?4 0 ?3 0 11 0 0.10 0 1 02 0 3 04 0 5 06 0 7 08 09 0 1 0 0 0 1 02 0 3 04 0 5 06 0 7 08 09 0 1 0 0 ? 0.06 0.10 0.05 0 ? 0.05 ? 0.10 ? 0.15 ? 0.20 ? 0.25 ? 0.04 ? 0.02 0 0.02 0.04 0.06 0.08 02859-014 modulating ramp level (ire) diffe re ntial gain e rror (%) diffe re ntial ph a se er r o r ( d egrees) ntsc subscriber (3.58mhz) r l = 150 ? r l = 1k ? r l = 1k ? r l = 150 ? v s = 5, g = +2 r f = 2k ? , r l as shown v s = 5, g = +2 r f = 2k ? , r l as shown 9 8 7 6 5 4 3 2 02859-011 fundamental frequency (mhz) total harmonic dis t ortion (dbc ) v o = 2v p-p v s = 3v, g = ? 1 r f = 2k ? , r l = 100 ? v s = 5v, g = +2 r f = 2k ? , r l = 100 ? v s = 5v, g = +1 r l = 100 ? v s = 5v, g = +2 r f = 2k ? , r l = 2k ? v s = 5v, g = +1 r l = 2k ? f i gure 11. t o t a l h a rm oni c d i s t o r ti on ?3 0 ?130 ?120 ?110 ?100 ?9 0 ?8 0 ?7 0 ?6 0 ?5 0 ?4 0 0 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 02859-012 output voltage (v p-p) wors t harmonic (dbc ) v s = 5v r l = 2k ? g = +2 10mhz 5mhz 1mhz f i gure 12. w o rs t h a r m o n ic v s . o u tput v o lt age 5.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 0.1 50 10 1 02859-013 frequency (mhz) output voltage sw ing ( t hd 0.5%) ( v p- p) v s = 5v g = ? 1 r f = 2k ? r l = 2k ? f i g u re 13. l o w d i s t or t i o n r a i l -to - r a il o u t p ut swing f i g u re 14. d i f f e r e nt ia l g a in and phas e e r r o rs 1000 1 10 100 10 10m 1m 100k 10k 1k 100 02859-015 frequency (hz) v o ltage nois e (na hz) v s = 5v fi g u r e 1 5 . i n p u t v o l t a g e n o i s e v s . fr e q u e n c y 100 0.1 1 10 10 10m 1m 100k 10k 1k 100 02859-016 frequency (hz) curre nt nois e (pa hz) v s = 5v f i gure 16. input cu rr e n t no is e v s . f r eq uenc y
ad8091/ad8092 rev. b | page 11 of 20 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 ?90 ? 100 0.1 1 1 0 100 500 02859-017 frequency (mhz) cros s t alk (db) v s = 5v r f = 2k ? r l = 2k ? v o = 2v p-p f i gur e 1 7 . ad80 92 cr o ssta l k ( o utput-to - o utput) vs. f r equenc y 0 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 ?90 ? 100 0.03 0.1 1 1 0 100 500 02859-018 frequency (mhz) cmrr (db) v s = 5v fi g u r e 1 8 . c m r r v s . fr e q u e n c y 100.000 31.000 10.000 3.100 1.000 0.310 0.100 0.031 0.010 0.1 1 1 0 100 500 02859-019 frequency (mhz) outp ut re s i s t ance ( ? ) v s = 5v g = +1 f i g u re 19. cl os ed-l oop o u t p ut r e s i s t a n c e v s . f r equenc y 20 10 0 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 0.01 0.1 1 1 0 100 500 02859-020 frequency (mhz) p s rr (db) v s = 5v ?psrr +psrr fi g u r e 2 0 . p s r r v s . fr e q u e n c y 70 60 50 40 30 20 10 0 0.5 1.0 1.5 2.0 02859-021 input steps (v p-p) settling time to 0.1% (ns) v s = 5v g = ? 1 r l = 2k ? f i gure 2 1 . setting ti me vs . input st ep 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 02859-022 load current (ma) outp ut s a turation v o ltage (v ) v s = 5v v oh = +85 c v oh = +25 c v oh = ? 40 c v ol = +85 c v ol = +25 c v ol = ? 40 c f i g u re 22. o u t p ut s a t u r a t i on v o lt ag e v s . l oad cur r ent
a8091/ad 8092 rev. b | page 12 of 20 100 90 80 70 60 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 02859-023 output voltage (v) open- l oop gain ( d b) r l = 2k ? r l = 150 ? v s = 5v f i gure 23. o p en-l oop g a in vs . o u tput v o ltag e 1.50v 02859-024 20mv 20ns v in = 0.1v p-p g = +1 r l = 2k ? v s = 3v f i gur e 2 4 . 10 0 m v st e p re sp onse ; g = + 1 2.50v 2.60v 2.40v 02859-025 50mv 20ns v s = 5v g = +1 r l = 2k ? f i gur e 2 5 . 20 0 m v st e p re sp onse ; v s = + 5 v , g = +1 2 .5v 3 .5v 1.5v 02859-026 v s = 5v g = +2 r l = 2k ? v in = 1v p-p f i gure 2 6 . la r g e s i gna l st ep r e sp o n se; v s = +5 v , g = + 2 2.5v 5v 02859-027 v s = 5v g = ? 1 r f = 2k ? r l = 2k ? 1v 2 s f i gure 2 7 . o u tput s w i n g; g = ?1 , r l = 2 k? 1v ?1v ?2v ?3v ?4v 2v 3v 4v 02859-028 v s = 5v g = +1 r l = 2k ? 1v 20ns f i gure 2 8 . la r g e s i gna l st ep r e sp o n se; v s = 5 v , g = + 1
ad8091/ad8092 rev. b | page 13 of 20 layout, grounding, and by passing considerations power supply bypassing power supply pins are actually inputs and care must be taken so that a noise-free stable dc voltage is applied. the purpose of bypass capacitors is to create low impedances from the supply to ground at all frequencies, thereby shunting or filtering a majority of the noise. decoupling schemes are designed to minimize the bypassing impedance at all frequencies with a parallel combination of capacitors. chip capacitors of 0.01 f or 0.001 f (x7r or npo) are critical and should be as close as possible to the amplifier package. larger chip capacitors, such as the 0.1 f capacitor, can be shared among a few closely spaced active components in the same signal path. a 10 f tantalum capacitor is less critical for high frequency bypassing and, in most cases, only one per board is needed at the supply inputs. grounding a ground plane layer is important in densely packed pc boards to spread the current-minimizing parasitic inductances. however, an understanding of where the current flows in a circuit is critical to implementing effective high speed circuit design. the length of the current path is directly proportional to the magnitude of parasitic inductances and thus the high frequency impedance of the path. high speed currents in an inductive ground return create an unwanted voltage noise. the length of the high frequency bypass capacitor leads are most critical. a parasitic inductance in the bypass grounding works against the low impedance created by the bypass capacitor. place the ground leads of the bypass capacitors at the same physical location. because load currents flow from the supplies as well, the ground for the load impedance should be at the same physical location as the bypass capacitor grounds. for the larger value capacitors, which are intended to be effective at lower frequencies, the current return path distance is less critical. input capacitance along with bypassing and ground, high speed amplifiers can be sensitive to parasitic capacitance between the inputs and ground. a few pf of capacitance reduces the input impedance at high frequencies, in turn increasing the amplifiers gain, causing peaking of the frequency response or even oscillations, if severe enough. it is recommended that the external passive components, which are connected to the input pins, be placed as close as possible to the inputs to avoid parasitic capacitance. the ground and power planes must be kept at a distance of at least 0.05 mm from the input pins on all layers of the board. input-to-output coupling the input and output signal traces should not be parallel to minimize capacitive coupling between the inputs and output and to avoid any positive feedback.
a8091/ad 8092 rev. b | page 14 of 20 driving capacitive loads a h i g h ly c a p a c i t i ve l o a d re a c t s w i t h t h e output of t h e a m pl i f i e r s , ca usin g a loss in phas e ma rg in and subs e q ue n t p e a k in g o r e v e n o s c i l l a t i o n , a s s h ow n i n f i g u re 2 9 an d f i g u re 3 0 . t h e r e are t w o m e t h o d s t o ef fe c t i v e l y minimize i t s ef fe c t . ? pu t a smal l va l u e r e sis t o r in s e r i es wi t h t h e o u t p u t t o is ola t e t h e l o a d c a p a c i t o r f r om t h e am pl i f i e r s output s t age. ? i n cr e a s e t h e phas e ma rg in w i t h hig h er n o i s e gain s o r b y a d di n g a po l e wi th a pa rall e l r e s i s t o r a n d ca pa c i t o r f r o m ?in t o t h e o u t p u t . 8 ?1 2 ?1 0 ?8 ?6 ?4 ?2 0 2 4 6 0.1 500 100 11 0 02859-029 frequency (mhz) gain ( d b) v s = 5v g = +1 r l = 2k ? c l = 50pf v o = 200mv p-p f i g u re 29. cl os ed-l oop f r equenc y r e s p ons e : c l = 50 pf 2.50v 100ns 50mv 2.60v 2.45v 2.55v 2.40v 02859-030 v s = 5v g = +1 r l = 2k ? c l = 50pf f i gur e 3 0 . 20 0 m v st e p re sp onse : c l = 5 0 pf a s t h e clos e d -lo o p ga in is i n cr e a s e d , t h e la rg er phas e ma rg in al lo ws f o r la rg e ca p a ci t o r lo ads wi th les s p e ak ing. a d din g a lo w val u e r e sis t o r in s e r i es w i t h t h e l o ad a t lo w e r ga i n s has t h e s a m e e f f e c t . f i g u re 3 1 sh o w s t h e e f f e c t of a s e r i e s re s i stor f o r v a r i ou s v o l t a g e ga ins. f o r la rg e ca p a ci t i v e lo ads, t h e f r e q uen c y r e s p o n s e o f t h e am plif ier is do min a t e d b y t h e s e r i es r e sisto r a n d ca p a ci t i v e lo ad . 10000 1 10 100 1000 16 5 23 4 02859-031 a cl (v/v) cap acitiv e load (pf) v s = 5v 30% overshoot r s = 3 ? r s = 0 ? r g r f r s c l v out 50 ? v in 100mv step f i g u re 31. cap a c i t i ve l oad d r ive v s . cl os ed-l oop g a in overdrive recovery o v er dr i v e o f a n a m plif ier o c c u rs w h en t h e o u t p u t a n d/o r i n p u t ra n g e is exce e d e d . th e am plif ier m u st r e co v e r f r o m t h is o v er dr i v e con d i t io n. the ad80 91/ad8092 r e c o v e r wi thin 60 n s f rom ne g a t i ve ove r d r ive a n d w i t h i n 4 5 ns f rom p o s i t i ve ov e r d r i v e , a s s h ow n i n fi g u r e 3 2 . 02859-032 v/div as shown 100ns input 1v/div output 2v/div v s = 5v g = +5 r f = 2k ? r l = 2k ? f i gure 32. o v e r dr ive r eco ver y active fil t ers a c t i v e f i l t ers a t hig h er f r e q uen c ies r e q u ir e wid e r b a n d w i d t h o p a m ps t o w o rk ef f e c t i v e l y . e x ces s i v e p h as e s h if t p r o d uced b y lo w e r f r e q uen c y o p a m ps can si g n if ica n t l y im p a c t ac t i v e f i lt er pe rf o r m a n c e . f i gur e 33 sh o w s a n exa m ple o f a 2 mh z b i quad b a ndwi d t h f i lt er t h a t u s e s t h re e op am p s . su ch c i rc u i t s are s o m e t i me s u s e d i n m e dic a l u l t r as ound sys t em s t o lo w e r t h e n o is e b a ndwi d t h o f t h e a n alog sig n al b e fo r e a/d co n v e r sio n . n o te t h a t t h e u n us e d am pl i f i e r s i n put s s h ou l d b e t i e d to g rou n d .
ad8091/ad8092 rev. b | page 15 of 20 02859-033 2 1 6 5 7 2 3 6 ad8092 ad8091 c2 50pf c1 50pf r5 2k ? r4 2k ? r6 1k ? r3 2k ? r2 2k ? r1 3k ? v out 3 ad8092 v in f i gure 33. 2 m h z biqu ad band- p ass f ilter t h e f r e q u e nc y re sp ons e of t h e c i rc u i t i s s h ow n i n f i g u re 3 4 . 0 ?10 ?20 ?30 ?40 10k 100k 1m 10m 100m 02859-034 frequency (hz) gain ( d b) f i gur e 3 4 . f r equenc y resp o n se o f 2 m h z ba nd- p a ss bi qua d f i l t er sync s t ripper s y n c hr o n izin g p u ls es a r e s o me t i m e s ca r r i e d on v i de o sig n als s o as not to re qu i r e a s e p a r a te channel to c a r r y t h e s y nc hroni z i n g info r m a t io n. h o w e v e r , fo r s o me f u n c t i o n s, such as a/ d co n v ersio n , i t is n o t desira b l e t o ha v e t h e sy n c pu ls es o n t h e vide o sig n al. thes e p u ls es r e d u c e t h e d y namic r a n g e o f t h e vid e o sig n a l and do n o t p r o v id e a n y us ef u l info r m a t io n fo r such a f u n c t i o n . a s y nc st r i pp e r re mo ve s t h e s y n c h ron i z i n g pu l s e s f rom a v i d e o sig n al w h i l e p a ssin g al l t h e us ef u l vide o info r m a t io n. f i gur e 35 s h o w s a p r ac tic a l sin g le-s u p p l y cir c ui t tha t us es o n l y a sin g le ad8091. i t is c a p a b l e o f dir e c t l y dr i v in g a r e v e rs e t e r m ina t e d vide o li n e . 02859-035 ad8091 + r2 1k ? r1 1k ? +0.8v (or 2 v blank ) 100 ? to a/d 3v or 5v 3 2 4 6 7 10 f 0.1 f v blank v in ground +0.4v video with sync ground video without sync f i g u re 35. sy nc st r i p p er the v i de o sig n a l pl us syn c is a pplie d t o t h e n o nin v er t i n g i n p u t wi t h t h e p r o p er t e r m in a t io n. the a m plif ier ga i n is s e t e q ua l t o 2 v i a t h e t w o 1 k ? re s i stor s i n t h e f e e d b a c k c i rc u i t . a bi a s vo lt age m u st b e a p pl i e d to r 1 for t h e i n put s i g n a l to h a ve t h e s y nc p u ls es s t r i p p e d a t t h e p r o p er le v e l. the bla n k i n g le v e l o f t h e i n p u t vide o p u ls e is t h e desir e d place t o r e m o v e t h e s y n c i n fo r m a t ion. th e am plif ier m u l t i p lies t h is lev e l b y 2. this l e v e l m u s t be a t g r o u n d a t t h e ou t p u t in o r d er f o r th e s y n c s t ri p p i n g a c t i o n t o tak e p l ace . b e ca use th e ga i n o f t h e a m pl i f i e r f rom t h e i n put of r 1 to t h e output i s ? 1 , a vo lt age eq ual t o 2 v bl a n k m u s t be a p plied t o ma k e t h e b l a n k i n g l e v e l co m e o u t a t g r ound . single-supply composite video line driver m a n y co m p osi t e vid e o sign als ha v e t h eir b l ank i n g leve l a t g r o u n d and ha ve vi de o info r m a t io n t h a t is b o t h p o si t i v e and n e g a t i v e . s u ch s i g n a l s r e q u ir e d u a l - s u p ply a m pl if iers t o p a ss t h e m . h o w e v e r , b y ac le ve l-s h if t i n g , a sing le-su p p l y a m p l if ier ca n be us e d t o p a s s t h es e sig n als. the fol l o wing co m p lic a t i o n s ma y ar is e f rom su ch te ch niq u es . s i gn als o f bo un d e d p e ak- t o-pe ak a m p l i t ud e t h a t va r y i n d u ty c y cle r e q u ir e la rg er d y na mic s w in g c a p a ci ty t h an t h eir (b o u n d e d ) p e a k -to-p e a k am pli t ude a f ter t h e y ar e ac-co u ple d . a s a w o rs t cas e , t h e d y namic si g n al sw in g a p p r o a ch es t w ice t h e peak- t o-peak v a l u e . on e o f t w o c o n d i t i o n s th a t d e f i n e th e max i m u m d y namic sw in g r e q u i r em e n ts is a s i g n a l t h a t is m o s t l y lo w b u t g o es hig h wi t h a d u ty c y c l e tha t is a smal l f r a c t i on of a p e rc e n t . t h e opp o s i te c o n d it i o n d e f i ne s t h e s e c o nd co ndi t ion. the w o rs t cas e o f co m p osi t e vi de o is n o t q u i t e t h is demandi n g . on e b o u n di n g co ndi t ion is a si g n a l t h a t is m o st ly b l ack fo r a n en t i r e f r a m e b u t has a w h i t e (f u l l a m pli t ude) mi nim u m wi d t h sp i k e a t le ast once in a f r a m e.
a8091/ad 8092 rev. b | page 16 of 20 the o t h e r ext r em e is a f u l l w h i t e vi de o sig n al. the bla n k i n g in t e r v als and sy n c ti ps o f s u ch a sig n al ha ve neg a ti v e -g o i n g exc u rsio n s in com p li an ce wi t h t h e com p osi t e v i de o sp e c if ic a t io n s . the com b ina t ion o f h o r i zo n t a l a n d v e r t ica l b l a n k i n g in t e r v als limi t s u c h a sig n al t o b e in g a t t h e hig h es t (w hi te) le ve l fo r a maxi m u m o f a b o u t 75% o f t h e t i m e . 02859- 036 ad8091 5v + 4.99k ? 10 f 47 f + 4.99k ? 10k ? r t 75 ? r g 1k ? r f 1k ? r bt 75 ? r l 75 ? v out c omposite video in + 220 f 0.1 f 3 2 4 6 7 1000 f 0.1 f1 0 f + a s a r e s u lt o f t h e d u ty c y cles b e tw e e n t h e tw o e x t r em es, a 1 v p - p co m p osi t e video sig n al tha t is m u l t i p lied b y a ga in o f 2 r e q u ir es a b ou t 3 . 2 v p-p o f d y na mic v o l t a g e sw in g a t t h e o u t p ut for an op am p to p a ss a c o m p o s i t e v i d e o s i g n a l of ar b i t r ar y va r y in g d u ty c y cle w i t h o u t dis t o r t i o n . f i gure 36. sing le-s up ply composit e video l i ne d r iv er the fe e d b a ck c i r c ui t p r o v ides u n i t y ga in fo r t h e dc b i asin g o f t h e in p u t and p r o v i d es a ga i n o f 2 fo r a n y sig n als t h a t a r e i n t h e vid e o b a n d wi d t h. th e o u t p u t is ac-co u ple d and t e r m ina t e d t o dr i v e t h e l i n e . s o m e c i r c ui ts us e a sy n c t i p c l am p t o h o l d t h e syn c t i ps a t a r e la t i v e l y co ns tan t leve l t o lo w e r th e am oun t o f d y na mic s i g n al swin g r e q u ir e d . h o w e v e r , t h e s e cir c ui ts ca n ha ve a r t i fac t s like syn c t i p co m p r e s s io n unles s t h e y a r e dr i v en b y a s o ur ce wi th a v e r y lo w o u t p u t im p e dan c e . the ad8091/ad8 092 ha v e ade q ua te sig n al swin g w h e n r u nnin g on a sing le 5 v s u p p l y t o ha n d le a n ac-co u p l ed co m p osi t e vid e o sign al . the c a p a ci t o r v a l u es w e r e s e le c t e d fo r p r o v i d ing minim u m t i lt or f i el d t i me d i s t or t i on of t h e v i d e o s i g n a l . t h e s e v a lu e s wou l d b e r e q u ir e d fo r vid e o t h a t is con s ider e d t o b e st udio o r b r o a d c a s t qu a l it y . h o we v e r , i f a l o we r c o nsu m e r g r a d e of v i d e o , s o metim e s r e f e r r ed t o as co n s u m er vide o , is al l tha t is des i r e d , th e val u es and t h e cos t o f t h e ca p a ci t o rs can b e r e d u ced b y as m u ch as a fac t or o f 5 wi t h mi ni m u m vis i b l e de g r ada t io n in t h e pi c t u r e. t h e i n put to t h e c i rc u i t i n fi g u re 3 6 i s a st a n d a r d c o m p o s ite (1 v p-p) video sig n al tha t has t h e bla n kin g l e ve l a t g r o u nd . the in p u t n e tw o r k l e v e l s h if t s t h e vi de o sig n al b y me a n s o f ac co u p ling. th e no nin v er tin g in p u t o f th e o p am p is b i as ed t o ha lf of t h e s u pply vo lt age.
ad8091/ad8092 rev. b | page 17 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 . 196 8) 4. 80 ( 0 . 189 0) 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) coplanarity 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-012-aa f i g u re 37. 8-l e ad s t anda r d s m a l l o u t l ine p a ckag e [soic _ n] narro w b o dy (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) 0.80 0.60 0.40 8 0 4 8 1 5 4.90 bsc pin 1 0.65 bsc 3.00 bsc seating plane 0.15 0.00 0.38 0.22 1.10 max 3.00 bsc coplanarity 0.10 0.23 0.08 compliant to jedec standards mo-187-aa f i g u re 38. 8-l e ad m i ni s m al l o u t l ine p a ck ag e [m sop ] (rm-8) di me nsio ns sho w n i n mi ll im e t e r s pin 1 1. 60 bs c 2. 80 bs c 1. 9 0 bs c 0. 95 bs c 1 3 4 5 2 0. 2 2 0. 0 8 10 5 0 0. 5 0 0. 3 0 0 . 1 5 ma x sea t i n g p l ane 1. 45 m a x 1. 30 1. 15 0. 90 2. 90 bs c 0. 60 0. 45 0. 30 compliant to jedec standards mo-178aa f i g u re 39. 5-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 - 23] (r t - 5) di me nsio ns sho w n i n mi ll im e t e r s
a8091/ad8092 rev. b | page 18 of 20 ordering guide model temperature range package descriptio n package outline branding information ad8091ar ?40c to +85c 8-lead soic r-8 ad8091ar-reel ?40c to +85c 8-lead soic, 13 tape and reel r-8 ad8091ar-reel7 ?40c to +85c 8-lead soic, 7 tape and reel r-8 ad8091arz 1 ?40c to +85c 8-lead soic r-8 ad8091arz-reel 1 ?40c to +85c 8-lead soic, 13 tape and reel r-8 ad8091arz-reel7 1 ?40c to +85c 8-lead soic, 7 tape and reel r-8 ad8091art-r2 ?40c to +85c 5-lead sot-23 rt-5 hva ad8091art-reel ?40c to +85c 5-lead sot-23, 13 tape and reel rt-5 hva ad8091art-reel7 ?40c to +85c 5-lead sot-23, 7 tape and reel rt-5 hva ad8091artz-r2 1 ?40c to +85c 5-lead sot-23 rt-5 hva# ad8091artz-r7 1 ?40c to +85c 5-lead sot-23, 7 tape and reel rt-5 hva# ad8091artz-rl 1 ?40c to +85c 5-lead sot-23, 13 tape and reel rt-5 hva# ad8092ar ?40c to +85c 8-lead soic r-8 ad8092ar-reel ?40c to +85c 8-lead soic, 13 tape and reel r-8 ad8092ar-reel7 ?40c to +85c 8-lead soic, 7 tape and reel r-8 ad8092arz 1 ?40c to +85c 8-lead soic r-8 ad8092arz-reel 1 ?40c to +85c 8-lead soic, 13 tape and reel r-8 ad8092arz-reel7 1 ?40c to +85c 8-lead soic, 7 tape and reel r-8 ad8092arm ?40c to +85c 8-lead msop rm-8 hwa ad8092arm-reel ?40c to +85c 8-lead msop, 13" tape and reel rm-8 hwa ad8092arm-reel7 ?40c to +85c 8-lead msop, 7" tape and reel rm-8 hwa ad8092armz 1 ?40c to +85c 8-lead msop rm-8 hwa# AD8092ARMZ-REEL 1 ?40c to +85c 8-lead msop, 13" tape and reel rm-8 hwa# AD8092ARMZ-REEL7 1 ?40c to +85c 8-lead msop, 7" tape and reel rm-8 hwa# 1 z = pb-free part. # denotes lead-free, may be top or bottom marked.
ad8091/ad8092 rev. b | page 19 of 20 notes
a8091/ad 8092 rev. b | page 20 of 20 notes ? 2005 anal og d e v i ces, inc. all ri ghts reserve d . tr ade m a r ks and registered trade m ar ks are the pr op erty of their respective owne rs. c02859C0 C 3/05(b)

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