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high performance video op amp ad811 rev. e 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 high speed 140 mh z band width (3 db, g = +1) 120 mh z band width (3 db, g = +2) 35 mhz bandw i dth (0.1 db , g = +2) 2500 v/s slew rate 25 ns sett ling ti me to 0.1% (for a 2 v step) 65 ns sett ling ti me to 0.01% ( f or a 10 v step) excellent vi deo performance (r l =150 ?) 0.01% d i fferen t ial gain, 0. 01 differentia l ph ase voltage noise of 1.9 nv/ hz lo w disto r tio n : thd = ?74 db @ 10 mhz excellent dc pr ecision: 3 mv max input offs et voltage flexible operat ion specified fo r 5 v an d 15 v o p eratio n 2.3 v output s w ing into a 75 ? load (v s = 5 v) applic a t io ns video crosspoint switchers, multimedia broadcast syst ems hdtv compatible systems video line dri v ers, distribut i on amplifiers adc/da c buff e r s dc restoration circuits medical ultrasound pet gamma counter applications gener a l description a wideban d c u r r en t f eedbac k op era t io nal a m p l if ier , th e ad811 is o p t i mi ze d fo r b r o a dcast-qua l i t y vid e o sy stems. th e ?3 db b a ndwi d t h o f 1 20 mh z a t a ga i n o f +2 a nd t h e dif f er en t i a l gain a nd p h as e o f 0.01% an d 0.01 (r l = 150 ?) mak e t h e ad811 a n exce l l en t ch oice f o r al l video sys t em s. th e ad811 is desig n e d t o m e e t a st r i n g en t 0.1 db ga in f l a t n e ss sp e c if ic a t io n t o a b a nd- wid t h o f 35 mh z (g = +2) in addi tion t o lo w dif f er en tial ga in a nd phas e er r o r s . this p e r f o r ma n c e is achi e v e d w h et her dr i v i n g o n e o r tw o bac k -t er mina t e d 75 ? ca b l es, wi th a lo w p o w e r s u p p l y c u r r en t o f 16.5 ma. f u r t h e r m o r e , t h e ad811 is s p ecif ie d ove r a p o we r su p p ly r a nge of 4 . 5 v to 1 8 v . (c o n ti n u e d o n pa ge 3) c o nnec t i o n di a g r a m s 1 2 3 4 8 7 6 5 ad811 nc ?in +in ?v s +v s nc output nc nc = no connect 00866-e - 001 f i gure 1. 8-l e ad plasti c (n- 8 ), cerdip ( q -8), soic (r - 8 ) nc +v s ?v s a d 811 nc ?in nc +in nc nc nc nc output nc nc = no connect nc nc nc 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 00866-e - 002 f i g u re 2. 16-l e ad s o ic (r-16) ad811 nc nc nc output ?v s +v s nc nc nc nc ?in +in nc nc nc nc nc nc = no connect nc nc nc 1 2 32 0 1 9 18 17 16 15 14 9 10 11 12 13 4 5 6 7 8 00866-e - 003 f i g u re 3. 20- t e r m in al l c c (e -2 0a ) +in ?in a d 811 nc nc nc nc nc nc +v s ? v s nc output nc nc nc = no connect nc nc nc nc nc nc 3 4 5 6 7 8 9 10 18 17 16 15 14 13 12 11 1 2 20 19 00866-e - 004 f i g u re 4. 20-l e ad s o ic (r-20)
ad811 rev. e | page 2 of 20 table of contents specifications ..................................................................................... 4 absolute maximum ratings ............................................................ 6 maximum power dissipation ..................................................... 6 metalization photograph ............................................................. 6 typical performance characteristics ............................................. 7 applications ..................................................................................... 12 general design considerations ................................................ 12 achieving the flattest gain response at high frequency .... 12 operation as a video line driver ............................................ 14 an 80 mhz voltage-controlled amplifier circuit ................ 15 a video keyer circuit ................................................................ 16 outline dimensions ....................................................................... 18 ordering guide .......................................................................... 20 revision history 7/04data sheet changed from rev. d to rev. e updated format............................................................. universal change to maximum power dissipation section .................... 7 changes to ordering guide ...................................................... 20 updated outline dimensions ................................................... 20
ad811 rev. e | page 3 of 20 gener a l descripti o n (c on tinued ) the ad811 is als o exce l l en t f o r p u ls ed a p p l ic a t io n s w h er e tra n - sien t r e s p on s e i s cr i t ical . i t can achie v e a maxi m u m s l e w r a t e o f g r ea t e r tha n 25 00 v/s wi t h a s e t t lin g t i m e o f les s tha n 25 n s to 0.1% o n a 2 v s t ep a nd 65 n s t o 0.01% o n a 10 v s t ep . the ad811 is ideal as an ad c o r d a c b u f f er in da t a acq u is i - tio n sys t e m s d u e t o i t s lo w dist or tio n u p t o 10 mh z and i t s wide uni t y ga in bandwid th. b e ca us e t h e ad811 is a c u r r en t f eed back a m plif ier , t h is b a ndwid t h c a n b e ma i n t a i n e d o v er a wi de ra n g e o f ga in s. the ad811 als o o f f e rs lo w v o l t a g e an d c u r r en t n o is e of 1.9 nv/ hz a nd 2 0 pa/ hz , r e sp e c t i vely , a nd excel l en t dc acc u - rac y f o r wid e d y n a mic ra n g e a p p l ica t io n s . 0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 d i ffer e n t ia l ph a s e ( d egr ees) 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 diffe re ntial gain (%) 5 6 7 8 9 1 0 1 11 2 1 31 4 1 5 supply voltage ( v) 00866-e - 005 r f = 649 ? f c = 3.58mhz 100 ire modulated ramp r l = 150 ? phase gain f i g u re 5. d i f f e r e nt i a l g a in and p h as e ?6 ?3 0 3 6 9 12 gain ( d b) frequency (mhz) 1 1 0 100 00866-e - 006 v s = 15v v s = 5v g = +2 r l = 150 ? r g = r fb f i gur e 6 . f r equenc y resp o n se
ad811 rev. e | page 4 of 20 specifications @ t a = +25c, v s = 15 v dc, r load = 150 ?, unless otherwise noted. table 1. ad811j/a 1 ad811s 2 parameter conditions v s min typ max min typ max unit dynamic performance small signal bandwidth (no peaking) ?3 db g = +1 r fb = 562 ? 15 v 140 140 mhz g = +2 r fb = 649 ? 15 v 120 120 mhz g = +2 r fb = 562 ? 15 v 80 80 mhz g = +10 r fb = 511 ? 15 v 100 100 mhz 0.1 db flat g = +2 r fb = 562 ? 15 25 25 mhz r fb = 649 ? 15 35 35 mhz full power bandwidth 3 v out = 20 v p-p 15 40 40 mhz slew rate v out = 4 v p-p 15 400 400 v/s v out = 20 v p-p 15 2500 2500 v/s settling time to 0.1% 10 v step, a v = ? 1 15 50 50 ns settling time to 0.01% 10 v step, a v = ? 1 15 65 65 ns settling time to 0.1% 2 v step, a v = ? 1 15 25 25 ns rise time, fall time r fb = 649, a v = +2 15 3.5 3.5 ns differential gain f = 3.58 mhz 15 0.01 0.01 % differential phase f = 3.58 mhz 15 0.01 0.01 degree thd @ f c = 10 mhz v out = 2 v p-p, a v = +2 15 ?74 ?74 dbc third-order intercept 4 @ f c = 10 mhz 15 36 36 dbm 15 43 43 dbm input offset voltage 5 v, 15 v 0.5 3 0.5 3 mv t min to t max 5 5 mv offset voltage drift 5 5 v/c input bias current ?input 5 v, 15 v 2 5 2 5 a t min to t max 15 30 a +input 5 v, 1 5 v 2 10 2 10 a t min to t max 20 25 a transresistance t min to t max v out = 10 v r l = 15 v 0.75 1.5 0.75 1.5 m? r l = 200 ? 15 v 0.5 0.75 0.5 0.75 m? v out = 2.5 v r l = 150 ? 5 v 0.25 0.4 0.125 0.4 m? 1 the ad811jr is specified with 5 v power supplies only, with operation up to 12 v. 2 see the analog devices military data sheet for 883b tested specifications. 3 fpbw = slew rate/(2 v peak ). 4 output power level, tested at a closed-loop gain of two.
ad811 rev. e | page 5 of 20 ad811j/a 1 ad811s 2 parameter conditions v s min typ max min typ max unit common-mode rejection v os (vs. common mode) t min to t max v cm = 2.5 v 5 v 56 60 50 60 db t min to t max v cm = 10 v 15 v 60 66 56 66 db input current (vs. common mode) t min to t max 1 3 1 3 a/v power supply rejection v s = 4.5 v to 18 v v os t min to t max 60 70 60 70 db +input current t min to t max 0.3 2 0.3 2 a/v ?input current t min to t max 0.4 2 0.4 2 a/v input voltage noise f = 1 khz 1.9 1.9 nv/ hz input current noise f = 1 khz 20 20 pa/ hz output characteristics voltage swing, useful operating range 3 5 v 2.9 2.9 v 15 v 12 12 v output current t j = 25c 100 100 ma short-circuit current 150 150 ma output resistance (open loop @ 5 mhz) 9 9 ? input characteristic +input resistance 1.5 1.5 m? ?input resistance 14 14 ? input capacitance +input 7.5 7.5 pf common-mode voltage range 5 v 3 3 v 15 v 13 13 v power supply operating range 4.5 18 4.5 18 v quiescent current 5 v 14.5 16.0 14.5 16.0 ma 15 v 16.5 18.0 16.5 18.0 ma transistor count number of transistors 40 40 1 the ad811jr is specified with 5 v power supplies only, with operation up to 12 v. 2 see the analog devices military data sheet for 883b tested specifications. 3 useful operating range is defined as the output voltage at which linearity begins to degrade.
ad811 rev. e | page 6 of 20 absolute maximum ra tings table 2. p a r a m e t e r r a t i n g supply voltage 18 v ad811jr grade only 12 v internal power dissipation observ e deratin g curves 8-lead pdip pac k age ja = 90c/ w 8-lead cerdip package ja = 110c/w 8-lead soic package ja = 155c/w 16-lead soic package ja = 85c/w 20-lead soic package ja = 80c/w 20-lead lcc pa ckage ja = 70c/w output short-ci rcuit duration observ e deratin g curves common-mode input vol t age v s differential input voltage 6 v storage temperature range (q, e) ?65c to +150c storage temperature range (n, r) ?65c to +125c operating tem p erature range ad811j 0c to +70c ad811a ?40c to +85c ad811s ?55c to +125c lead temperature range (sol dering 60 s e c) 300c 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 r a t i ng o n ly ; 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 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 p o w e r tha t can be s a f e l y dis s i p a t ed b y t h e ad811 is limi t e d b y th e as s o c i a t ed r i s e in j u n c t i o n t e m p er - a t ur e . f o r th e pla s ti c pa c k a g e s , th e ma xi m u m sa f e j u n c ti o n t e m p era t ur e is 1 45c. f o r t h e c e rd ip a nd lc c p a cka g es, t h e maxim u m j u n c t i o n t e m p er a t ur e is 175c. i f th es e maxim u m s a r e exce e d e d mo m e n t a r i l y , p r o p er cir c ui t o p er a t io n is r e st o r e d as s o o n as t h e die t e m p era t ur e i s r e d u ce d . l e a v i n g t h e de vic e i n t h e o v e rhe a t e d co n d i t ion fo r a n ext e n d e d p e r i o d can r e s u l t i n d e v i c e bu r n out . t o e n su re prop e r op e r a t i o n , it i s i m p o r t a n t to obs e r v e t h e dera t i n g c u r v es in f i gur e 22 a nd f i gur e 25. w h i l e t h e ad8 11 is in t e r n a l ly sh o r t-cir c ui t p r o t e c t e d , t h is ma y n o t b e s u f f i cien t t o gua r a n te e t h a t t h e maxi m u m j u n c t i o n t e m p era t ur e is n o t exce e d e d u n der al l condi t i o n s. an i m p o r t an t exa m ple is w h e n t h e am plif ier is dr i v i n g a r e vers e-t e r m in a t e d 75 ? ca b l e an d th e ca b l e s fa r end is sh o r t e d t o a p o w e r s u p p l y . w i t h p o w e r s u p p l ies o f 12 v ( o r les s ) a t a n am b i en t t e m p er a - tu re of + 2 5 c or l e ss , and t h e c a bl e s h or te d to a supply r a i l , t h e a m plif ier is n o t dest r o ye d , e v en if t h is co ndi t i on p e rsists fo r a n ext e n d e d p e r i o d . me t a liz a ti on pho t og r a ph c o n t ac t t h e fac t o r y fo r t h e la t e st di m e n s ion s . 0.0618 (1.57) 0.098 (2.49) +input ? input v? v+ v out ad811 6 7 4 3 2 00866-e - 007 f i g u re 7. m e t a l i z a t i on p h ot og r a p h d i m e ns i o ns sh o w n in i n ches and ( m il li met e rs ) esd c a ution 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 without detection. although this product features proprie - tary esd protect i on circuitry, permanent damag e may o ccur on devices subje c ted to high energy electrostatic discharges. ther efore, prop er esd precautions a r e reco mmende d to avoid performance degradation or lo ss of functionality.
ad811 rev. e | page 7 of 20 typical perf orm ance cha r acte ristics common-mode v o ltage range ( v ) 0 5 10 15 20 supply voltage ( v) 5 01 0 1 5 00866-e - 008 t a = 25c 2 0 f i gure 8. input co mm on-m ode v o lt a g e ra nge v s . sup p l y v o ltag e 0 5 10 15 20 25 30 35 output voltage (v p-p) load resistance ( ? ) 10 1k 100 10k 00866-e - 009 v s = 15v v s = 5v f i g u re 9. o u t p ut v o lt ag e sw ing v s . r e s i s t ive l oad ?30 ?25 ?20 ?15 ?10 ?5 mas t e r clock fre q ue ncy (mhz) 0 5 10 ?60 ? 40 ?20 0 20 40 60 80 100 120 140 junction temperature ( c) 00866-e - 010 noninverting input 5 to 15v inverting input v s = 15v v s = 5v f i gure 10. input b i a s current v s . junc t i on t e mper ature m a gnitude of the output voltage ( v) 0 5 10 15 20 supply voltage ( v) 5 01 0 1 5 00866-e - 011 t a = 25c no load r l = 150 ? 2 0 f i g u re 11. o u t p ut v o lt ag e sw ing v s . su p p ly v o lt ag e 3 6 9 12 15 18 21 quie s c e n t s u p p l y curre nt (ma) ?60 ? 40 ?20 0 20 40 60 80 100 120 140 junction temperature ( c) 00866-e - 012 v s = 15v v s = 5v f i gure 1 2 . q u i e scent sup p l y curr ent v s . j u nctio n t e m p er a t ur e ?10 ?8 ?6 ?4 ?2 0 2 4 6 8 10 in pu t offset volta ge ( m v) ?60 ? 40 ?20 0 20 40 60 80 100 120 140 junction temperature ( c) 00866-e - 013 v s = 15v v s = 5v f i g u re 13. input o f f s et v o lt ag e v s . junc t i on t e mpe r at u r e
ad811 rev. e | page 8 of 20 s h ort-circuit curre nt (ma) 50 100 150 200 250 ?60 ? 40 ?20 0 20 40 60 80 100 120 140 junction temperature ( c) 00866-e - 014 v s = 15v v s = 5v f i gure 14. sho r t- ci rcuit cu rrent v s . jun c tion t e mpe r atu r e clos e d -loop outp ut re s i s t ance ( ? ) 0.01 1 0.1 10 frequency (hz) 100k 10k 1m 10m 100m 00866-e - 015 v s = 15v v s = 5v gain = ? 2 r fb = 649 ? f i g u re 15. 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 0 20 40 60 100 over sh oot ( % ) 0 2 4 6 8 10 r i se tim e ( n s) 0.8 1.0 0.4 0.6 1.2 1.4 1.6 value of feedback resistor [r fb ] (k ? ) 00866-e - 016 overshoot rise time v s = 15v v o = 1v p-p r l = 150 ? gain = +2 f i gur e 1 6 . r i se t i me a n d o v er shoo t vs . v a lue o f f e edback resi st or , r fb trans re s i s t ance (m ? ) 0 0.5 1.0 1.5 2.0 ?60 ? 40 ?20 0 20 40 60 80 100 120 140 junction temperature ( c) 00866-e - 017 v s = 15v r l = 200 ? v out = 10v v s = 5v r l = 150 ? v out = 2.5v f i gure 17. t r ansresi s tanc e v s . jun c tio n t e m p er ature nois e curre nt (pa/ hz) 1 10 100 n o ise volta ge ( n v/ h z ) 1 10 100 frequency (hz) 100 10 1k 10k 100k 00866-e - 018 noninverting current v s = 5v to 15v inverting current v s = 5v to 15v voltage noise v s = 15v voltage noise v s = 5v fi g u r e 1 8 . i n p u t n o i s e v s . fr e q u e n c y 0 2 4 6 8 10 p e aking (db) 0 40 80 120 160 200 ?3 db bandwidth (mhz) 0.8 1.0 0.4 0.6 1.2 1.4 1.6 value of feedback resistor [r fb ] (k ? ) 00866-e - 019 peaking bandwidth v s = 15v v o = 1v p-p r l = 150 ? gain = +2 f i gure 19. ? 3 db bandwidth and p e ak ing vs. v a lue of r fb
ad811 rev. e | page 9 of 20 30 40 50 60 70 80 cmrr (db) 90 100 110 frequency (hz) 10k 1k 100k 1m 10m 00866-e - 020 v s = 15v v s = 5v 649 ? 150 ? 150 ? 649 ? v in v out f i g u re 20. co m m o n -m ode r e jec t ion rat i o v s . f r equenc y 5 10 20 30 40 50 p s rr (db) 60 70 80 frequency (hz) 10k 1k 100k 1m 10m 00866-e - 021 v s = 15v r f = 649 ? a v = +2 v s = 5v curves are for worst case condition where one supply is varied while the other is held constant. f i gure 21. p o wer s u p p ly rej e c t ion rat i on vs. f r equ e nc y total power dissipation (w) 0.5 1.0 1.5 2.0 2.5 ?50 ? 30 ?40 ? 20 ?10 0 20 60 10 30 40 50 70 80 90 ambient temperature ( c) 00866-e - 022 t j max = ? 145 c 16-lead soic 20-lead soic 8-lead soic 8-lead pdip f i gure 22. maxi mu m p o w e r d i ssipati o n v s . t e mper ature f o r plasti c p a ck ag es 0 5 10 15 20 25 output voltage (v p-p) frequency (hz) 100k 10m 1m 100m 00866-e - 023 v s = 15v v s = 5v gain = +10 output level for 3% thd f i gure 2 3 . la r g e s i gna l f r equenc y r e sp o n se harmonic dis t ortion (dbc ) ?130 ?110 ?9 0 ?7 0 ?5 0 frequency (hz) 10k 1k 100k 1m 10m 00866-e - 024 r l = 100 ? v out = 2v p-p gain = +2 5v supplies 15v supplies second harmonic third harmonic second harmonic third harmonic f i gur e 2 4 . ha rm onic di stor ti on vs . f r eque nc y 0.4 0.8 0.6 1.2 2.0 2.4 2.8 3.0 3.2 3.4 1.6 1.0 1.8 2.2 2.6 1.4 total power dissipation (w) ?60 ? 40 ?20 0 20 40 60 80 100 120 140 ambient temperature ( c) 00866-e - 025 t j max = ? 175c 20-lead lcc 8-lead cerdip f i g u re 25. m a x i mu m p o we r d i s s i pat i o n v s . t e m p er ature fo r he rm etic p a ckages
ad811 rev. e | page 10 of 2 0 00866-e - 026 hp8130 pulse generator v in v out to tektronix p6201 fet probe r fb +v s ?v s ad811 + ? 6 5 7 3 2 r l r g 50 ? 0.1 f 0.1 f f i gure 26. nonin v e r ting am p l i f i e r c o n n e c t i o n 00866-e - 027 10 90 100 0% 1v 1v 10ns v in v out f i g u re 27. sm a ll s i g n al p u ls e r e s p ons e , g a i n = + 1 00866-e - 028 10 90 100 0% 1v 100mv 10ns v in v out f i g u re 28. sm a ll s i g n al p u ls e r e s p ons e , g a i n = + 10 ?12 ?9 ?6 ?3 0 3 6 9 gain ( d b) frequency (mhz) 1 1 0 100 00866-e - 029 v s = 15v r fb = 750 ? v s = 5v r fb = 619 ? g = +1 r l = 150 ? r g = f i g u re 29. cl os ed-l oop g a in v s . f r equ e nc y , g a in = + 1 8 11 14 17 20 23 26 gain ( d b) frequency (mhz) 1 1 0 100 00866-e - 030 v s = 15v r fb = 511 ? v s = 5v r fb = 442 ? g = +1 r l = 150 ? f i g u re 30. cl os ed-l oop g a in v s . f r equ e nc y , g a in = + 10 00866-e - 031 10 90 100 0% 10v 1v 20ns v in v out f i g u re 31. lar g e s i g n al p u ls e r e s p ons e , g a i n = + 10
ad811 rev. e | page 11 of 2 0 00866-e - 032 hp8130 pulse generator v in r g r fb r l ?v s +v s ad811 + ? 7 6 4 3 2 0.1 f 0.1 f v out to tektronix p6201 fet probe f i g u re 32. inve r t ing a m pl if ie r conne c t i o n 00866-e - 033 10 90 100 0% 1v 1v 10ns v in v out f i g u re 33. sm a ll s i g n al p u ls e r e s p ons e , g a i n = ? 1 00866-e - 034 10 90 100 0% 1v 100mv 10ns v in v out f i g u re 34. sm a ll s i g n al p u ls e r e s p ons e , g a i n = ? 10 ?1 2 ?9 ?6 ?3 0 3 6 gain ( d b) frequency (mhz) 1 1 0 100 00866-e - 035 v s = 15v r fb = 590 ? v s = 5v r fb = 562 ? g = ? 1 r l = 150 ? f i g u re 35. cl os ed-l oop g a in v s . f r equ e nc y , g a in = ? 1 8 11 14 17 20 23 26 gain ( d b) frequency (mhz) 1 1 0 100 00866-e - 036 v s = 15v r fb = 511 ? v s = 5v r fb = 442 ? g = ? 1 r l = 150 ? f i g u re 36. cl os ed-l oop g a in v s . f r equ e nc y , g a in = ? 10 00866-e - 037 10 90 100 0% 10v 1v 20ns v in v out f i g u re 37. lar g e s i g n al p u ls e r e s p ons e , g a i n = ? 10
ad811 rev. e | page 12 of 20 applications general design considerations the ad811 is a current feedback amplifier optimized for use in high performance video and data acquisition applications. because it uses a current feedback architecture, its closed-loop ?3 db bandwidth is dependent on the magnitude of the feed- back resistor. the desired closed-loop gain and bandwidth are obtained by varying the feedback resistor (r fb ) to tune the bandwidth and by varying the gain resistor (r g ) to obtain the correct gain. table 3 contains recommended resistor values for a variety of useful closed-loop gains and supply voltages. table 3. ?3 db bandwidth vs. closed-loop gain and resistance values v s = 15 v closed-loop gain r fb r g ?3 db bw (mhz) +1 750 ? 140 +2 649 ? 649 ? 120 +10 511 ? 56.2 ? 100 ? 1 590 ? 590 ? 115 ?10 511 ? 51.1 ? 95 v s = 5 v closed-loop gain r fb r g ?3 db bw (mhz) +1 619 ? 80 +2 562 ? 562 ? 80 +10 442 ? 48.7 ? 65 ? 1 562 ? 562 ? 75 ? 10 442 ? 44.2 ? 65 v s = 10 v closed-loop gain r fb r g ?3 db bw (mhz) +1 649 ? 105 +2 590 ? 590 ? 105 +10 499 ? 49.9 ? 80 ?1 590 ? 590 ? 105 ?10 499 ? 49.9 ? 80 figure 18 and figure 19 illustrate the relationship between the feedback resistor and the frequency and time domain response characteristics for a closed-loop gain of +2. (the response at other gains is similar.) the 3 db bandwidth is somewhat dependent on the power supply voltage. as the supply voltage is decreased, for example, the magnitude of the internal junction capacitances is increased, causing a reduction in closed-loop bandwidth. to compensate for this, smaller values of feedback resistor are used at lower supply voltages. achieving the flattest gain response at high frequency achieving and maintaining gain flatness of better than 0.1 db at frequencies above 10 mhz requires careful consideration of several issues. choice of feedback and gain resistors because of the previously mentioned relationship between the 3 db bandwidth and the feedback resistor, the fine scale gain flatness varies, to some extent, with feedback resistor tolerance. therefore, it is recommended that resistors with a 1% tolerance be used if it is desired to maintain flatness over a wide range of production lots. in addition, resistors of different construction have different associated parasitic capacitance and inductance. metal film resistors were used for the bulk of the character- ization for this data sheet. it is possible that values other than those indicated are optimal for other resistor types. printed circuit board layout considerations as is expected for a wideband amplifier, pc board parasitics can affect the overall closed-loop performance. of concern are stray capacitances at the output and the inverting input nodes. if a ground plane is used on the same side of the board as the signal traces, a space (3/16" is plenty) should be left around the signal lines to minimize coupling. additionally, signal lines connecting the feedback and gain resistors should be short enough so that their associated inductance does not cause high frequency gain errors. line lengths less than 1/4" are recommended. quality of coaxial cable optimum flatness when driving a coax cable is possible only when the driven cable is terminated at each end with a resistor matching its characteristic impedance. if the coax is ideal, then the resulting flatness is not affected by the length of the cable. while outstanding results can be achieved using inexpensive cables, note that some variation in flatness due to varying cable lengths may occur. power supply bypassing adequate power supply bypassing can be critical when optimiz- ing the performance of a high frequency circuit. inductance in the power supply leads can form resonant circuits that produce peaking in the amplifiers response. in addition, if large current transients must be delivered to the load, then bypass capacitors (typically greater than 1 f) are required to provide the best settling time and lowest distortion. although the recommended 0.1 f power supply bypass capacitors are sufficient in many applications, more elaborate bypassing (such as using two paralleled capacitors) may be required in some cases.
ad811 rev. e | page 13 of 2 0 driving capacitive lo ads the fe e d b a ck and ga in r e sis t o r val u es in t a b l e 3 r e s u l t in v e r y f l a t clos e d -lo o p r e s p o n s e s i n a pplica t ion s w h ere t h e lo ad ca p a c i - ta n c e s a r e be lo w 10 pf . c a pa ci ta n c e s gr ea t e r t h a n th i s r e s u l t in i n cr eased peakin g a n d o v er sh o o t , al th o u g h n o t n e ces s a r il y i n a su st ai ne d o s c i l l a t i on . ther e a r e a t le ast tw o v e r y ef fe c t i v e w a ys t o co m p en s a t e fo r t h is ef fe c t . on e w a y is t o in cr e a s e t h e ma g n i t ude o f t h e fe e d b a ck r e sis t o r , w h ich lo w e rs t h e 3 db f r e q uen c y . th e ot h e r m e t h o d is t o in c l ude a smal l r e sis t o r in s e r i es wi th t h e ou t p u t o f t h e am p l i- f i er t o is ola t e i t f r o m t h e lo ad c a p a ci t a n c e . th e r e s u l t s o f t h es e tw o t e c h niq u es a r e il l u s t ra t e d in f i gur e 39. u s in g a 1.5 k? f eed back r e sis t or , th e o u t p u t r i p p l e is les s tha n 0 . 5 db w h en dr i v in g 100 pf . the ma in dis a dva n t a g e o f this m e t h o d is tha t i t s a cr if ices a li t t le b i t o f ga i n f l a t ness fo r in cr e a s e d c a p a ci t i v e lo ad d r i v e c a pa b i li t y . w i th th e s e c o n d m e th od , u s i n g a s e ri e s r e s i s t o r , t h e l o ss of f l a t ne ss do e s not o c c u r . ad811 + ? 7 6 4 2 3 r s (optional) c l r l v out ?v s +v s r fb r g r t v in 0.1 f 0.1 f 00866-e - 038 f i g u re 38. r e c o m m e nded conn ec t i on f o r d r iv ing a l a r g e capa cit i ve l oad ?6 ?3 0 3 6 9 12 gain ( d b) frequency (mhz) 1 1 0 100 00866-e - 039 v s = 15v c l = 100pf r l = 10k ? gain = +2 r fb = 1.5k ? r s = 0 r fb = 649 ? r s = 30 ? f i g u re 39. p e r f or m a nc e co mp ar is on of t w o m e t h ods f o r d r iv ing a capa c i t i ve l o ad 0 10 20 30 40 50 60 70 80 90 100 va lu e of r s ( ? ) load capacitance (pf) 10 100 1000 00866-e - 040 gain = +2 v s = 15v r s value specified is for flattest frequency response f i gure 40. r e c o m m e nded v a lu e of s e ri es r e sisto r v s . t h e a m ount of cap a c i t i ve l o ad f i gur e 40 sh o w s r e co mm e nde d r e sisto r va l u es fo r dif f er en t lo ad c a p a c i t a nc e s . r e fe r ag ai n to f i g u re 3 9 for an e x am pl e of t h e r e s u l t s o f th i s m e th o d . n o t e th a t i t ma y be n e ce ssa r y t o a d j u s t th e ga in set t in g r e si s t o r , r g , to c o r r e c t for t h e a tte n u a t i o n w h i c h r e s u l t s d u e t o t h e divider fo r m e d b y t h e s e r i es r e sis t o r , r s , a nd t h e lo ad r e sist an ce. a p plica t ion s t h a t r e q u ir e dr i v i n g a la rge lo ad c a p a ci t a n c e a t a hig h s l e w r a t e ar e o f t e n limi te d b y t h e o u t p u t c u r r en t a v a i la b l e f r o m t h e dr iving a m plif ier . f o r exa m ple , a n am plif ier limi t e d to 25 ma o u t p u t c u r r en t ca nn o t dr i v e a 500 pf load a t a s l ew r a t e g r ea t e r tha n 50 v/s. h o w e v e r , be ca us e o f t h e ad811 s 100 ma o u t p u t c u r r en t, a s l e w ra te o f 200 v/s is ac hieva b l e w h en dr iv- in g the s a m e 50 0 pf ca p a ci t o r , as s h own in f i gu r e 41. 00866-e - 041 10 90 100 0% 5v 2v 100ns v in v out f i g u re 41. o u t p ut w a vef o r m of an a d 81 1 d r iv i n g a 5 0 0 pf l oad . g a in = +2, r fb = 649 ? , r s = 1 5 ?, r s = 10 k ?
ad811 rev. e | page 14 of 2 0 oper a t ion as a vide o line driver the ad811 has been desig n e d to o f f e r o u ts ta n d in g p e r f o r m- a n ce a t c l osed - l oo p ga i n s o f +1 o r gr ea t e r , wh il e d r i v i n g m u l t i p le re v e rs e - t e r m ina t e d v i de o lo ads. th e lo w e s t dif f er en t i al ga in and phas e er r o rs a r e ob t a in e d w h e n usin g 15 v p o w e r s u p p lies. w i t h 12 v s u p p lies, t h er e is an in sig n if ican t i n cr e a s e in t h es e er r o rs a nd a slig h t im p r o v em en t in gain f l a t n e ss. d u e t o p o w e r dis s i p a t ion co n s i d era t io n s , 12 v s u p p lies a r e r e co mme n d e d fo r o p t i m u m vi d e o p e r f o r ma n c e. e x cel l en t p e r f o r ma n c e can b e ac hie v e d a t m u c h lo w e r s u p p lies as w e l l . the clos e d -lo o p ga in v e rs us t h e f r e q uen c y a t dif f er en t s u p p l y v o l t a g es is sh o w n in f i gur e 43. f i gur e 44 is a n os cil l os co p e p h o t og ra ph o f a n ad811 lin e dr i v er s p u ls e r e s p o n s e wi t h 15 v s u p p lies. th e di f f er en t i al ga i n and phas e er r o r v e rs us t h e s u p p l y a r e p l o t t e d in f i gur e 45 a n d f i g u r e 46, r e s p ec ti v e l y . an o t h e r im p o r t a n t con s idera t ion w h e n dr ivin g m u l t i p le ca b l es is t h e h i g h f r e q uen c y is ola t ion b e tw e e n t h e o u t p u t s o f t h e ca b l es. due t o i t s lo w o u t p u t im p e dan c e , t h e ad811 ac hiev es b e tte r t h a n 4 0 d b of output - t o - output i s o l at i o n a t 5 m h z dr i v i n g b a ck-ter mina te d 75 ? c a b l es. v in ?v s +v s 0.1 f 0.1 f ad811 v out no. 2 v out no. 1 75 ? cable 75 ? cable 75 ? cable 75 ? 75 ? 649 ? 649 ? 75 ? 75 ? 75 ? + ? 7 6 4 3 2 00866-e - 042 f i g u re 42. a vide o line d r ive r o p e r at i n g at a g a in of + 2 ?6 ?3 0 3 6 9 12 gain ( d b) frequency (mhz) 1 1 0 100 00866-e - 043 v s = 15v r fb = 649 ? v s = 5v r fb = 562 ? g = +2 r l = 150 ? r g = r fb f i g u re 43. cl os ed-l oop g a in v s . f r equ e nc y , g a in = + 2 00866-e - 044 10 90 100 0% 1v 1v 10ns v in v out f i g u re 44. sm a ll s i g n al p u ls e r e s p ons e , g a i n = + 2 , v s = 1 5 v 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 diffe re ntial gain (%) 56 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 supply voltage (v) 00866-e - 045 r f = 649 ? f c = 3.58mhz 100 ire modulated ramp a. driving a single, back- terminated, 75 ? coax cable b. driving two parallel, back- terminated, coax cables a b f i g u re 45. d i f f e r e nt ia l g a in e rror v s . su p p ly v o lt ag e f o r the vide o l i ne d r iv er of f i gu r e 4 2 0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 d i ffer e n t ia l ph a se ( d egr ees) 56 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 supply voltage (v) 00866-e - 046 r f = 649 ? f c = 3.58mhz 100 ire modulated ramp a. driving a single, back- terminated, 75 ? coax cable b. driving two parallel, back- terminated, coax cables a b f i g u re 46. d i f f e r e nt ia l p h as e e r r o r v s . s u p p ly v o lt ag e f o r the vide o l i ne d r iv er of f i gu r e 4 2
ad811 rev. e | page 15 of 2 0 an 80 mhz v o l t a g e- c o ntrolled amplifier circuit the v o l t a g e-con t r o l l ed a m p l if ier (v ca) cir c ui t o f f i gur e 48 s h o w s t h e ad8 11 bein g us ed wi th t h e ad834, a 500 mh z, 4-q u adra n t m u l t i p lier . the a d 8 34 m u l t i p lies t h e sig n al i n put b y t h e dc c o n t rol vol t age, v g . th e ad834 o u t p u t s a r e in t h e fo r m o f dif f er en t i a l c u r r en ts f r o m a p a ir o f o p en col l e c t o rs, e n s u ri n g th a t th e full ba n d w id th o f th e m u l t i p li e r (wh i c h exceeds 500 mh z) is a v a i la b l e f o r cer t a i n a p p l ica t ion s . h e r e , the ad811 o p a m p p r o v ides a b u f f er ed , sin g le-en d e d , g r o u n d - r e f e r e n c ed o u t p u t . u s in g f e e d bac k r e sis t o r s r8 and r9 o f 511 ?, t h e o v eral l ga in ra n g es f r o m ?70 db fo r v g = 0 db t o +12 db (a n u m e r i cal ga in o f +4) wh en v g = 1 v . th e ov eral l t r a n sfer fun c ti o n o f th e v c a i s v ou t = 4 (x1 ? x2)(y1 ? y2), whic h re d u c e s to v ou t = 4 v g v in usi n g th e la b e li n g co n v en ti o n s s h own in f i gur e 47. th e cir c u i t s ?3 db ban d wid t h o f 80 mh z is m a i n ta in e d e s sen t iall y co n s ta n t th a t i s , in d e p e n d en t o f ga in . the r e s p o n s e can b e ma in tain e d f l a t t o wi thin 0.1 db f r o m dc t o 40 mh z a t f u l l ga in wi t h the addi tio n o f an op tio n al c a p a ci t o r of ab out 0 . 3 p f a c ro ss t h e f e e d b a ck re s i stor r 8 . t h e c i rc u i t p r o d uces a f u l l - s ca le o u t p u t o f 4 v fo r a 1 v in p u t an d can dr i v e a r e v e rs e-ter m ina t e d lo ad o f 50 ? o r 75 ? t o 2 v . the ga in can be in cr eas e d t o 20 db (10) b y ra i s in g r8 an d r9 to 1.27 k? , w i t h a co r r esp o nding de cr e a s e i n ?3 db b a n d w i d t h to a p p r o x im a t ely 25 mh z. t h e max i m u m o u tpu t vol t a g e u nde r th es e condi t i o n s is in cr eas e d t o 9 v usin g 12 v s u p p lies. the gai n -con t r ol in p u t volt age, v g , ma y b e a p o s i t i ve or ne g a t i ve g r o u n d -r efer e n ce d v o l t a g e , o r f u l l y dif f er en t i al , dep e n d in g on t h e c h oi c e of c o n n e c t i ons a t pi ns 7 a n d 8 . a p o s i t i ve v a lu e of v g r e s u l t s in an o v eral l n o ni n v er t i ng r e s p o n s e . re versin g t h e sig n of v g sim p l y c a us es t h e sig n o f t h e o v eral l r e s p o n s e t o i n v e r t . i n fac t , a l t h o u g h t h is cir c ui t has b e en cl assif i e d as a vol t a g e - co n t r o l l e d am plif ier , i t is a l s o q u i t e us ef u l as a ge n e ra l- p u r p os e , f o ur -q uadran t m u l t i p lier , wi t h g o o d lo ad dr ivin g ca p a b i l i ties a nd f u l l y sy m m et r i ca l r e sp o n s e s f r o m t h e x and y i n p u ts . the ad811 an d ad834 c a n bo t h b e o p era t e d f r o m p o w e r su p p ly vol t age s of 5 v . w h i l e i t is not ne c e ss ar y to p o we r t h e m f r o m t h e s a me su p p lies, t h e comm on- m o d e vol t a g e a t w1 and w2 m u st b e b i as e d wi t h in t h e c o mm on- m o d e r a n g e o f t h e ad811 s in p u t sta g e . t o ac hiev e th e lo w e s t dif f er en tial gain and phas e er r o rs, i t is r e co mme n d e d t h a t t h e ad811 b e o p era t e d f r om p o we r supply vo lt age s of 1 0 v or g r e a te r . t h i s v c a cir c ui t o p era t es f r o m a 12 v d u al p o w e r s u p p ly . x2 x1 +v s w1 y1 y2 w2 ?v s u1 ad834 u3 ad811 r4 182 ? r5 182 ? r1 100 ? r2 100 ? r3 249 ? r6 294 ? r7 294 ? r9* r8* r l fb c2 0.1 f c1 0.1 f ?12v v out fb +12v v g v in *r8 = r9 = 511 ? for 4 gain r8 = r9 = 1.27k ? for 10 gain + ? 1234 8765 7 6 4 3 2 + ? 00866-e - 047 f i gure 47. a n 8 0 m h z v o ltag e - cont r o l l ed a m pl ifie r
ad811 rev. e | page 16 of 2 0 a vi deo ke y e r circuit b y usin g tw o ad834 m u l t i p liers, a n ad811, a nd a 1 v dc s o ur c e , a sp e c ia l fo r m of a tw o-i n p u t v c a cir c ui t ca l l e d a vide o k e yer ca n be as s e m b le d . k e yin g is t h e t e r m us ed in r e f e r e n c e t o b l en d- in g tw o o r m o r e vide o s o ur ces u n der t h e con t r o l o f a t h ir d sig n al o r sig n als t o cr e a t e s u ch sp e c ia l ef fe c t s as dis s ol v e s and o v erla y s . th e c i r c ui t sh own in f i gur e 48 is a t w o-in pu t k e yer , wi t h vide o i n p u ts v a a nd v b , a nd a con t r o l in put v g . t h e tra n sf e r fun c ti o n (wi t h v ou t at t h e l o a d ) i s g i v e n b y v ou t = gv a + (1? g ) v b w h er e g is a di m e n s ionles s va r i a b le (ac t ual l y , j u s t t h e ga i n o f t h e a sig n al p a th) t h a t ra n g es f r o m 0 wh en v g = 0 t o 1 when v g = 1 v . th us, v ou t va r i es co n t in uo us l y betw e e n v a a nd v b as g va r i es f r o m 0 t o 1. cir c ui t o p er a t ion is st ra ig h t fo r w a r d . c o n s ider f i rst t h e sig n a l p a t h t h r o ug h u 1 , w h ich hand les vide o i n p u t v a . i t s ga in is c l ea r l y 0 wh en v g = 0, a n d t h e s c alin g ch os en en s u r e s tha t i t has a uni t y va l u e w h e n v g = 1 v ; th i s tak e s ca r e o f th e f i r s t t e rm o f th e tra n sf e r fun c ti o n . o n t h e o t h e r h a n d , th e v g in p u t t o u2 is t a k e n t o t h e i n ver t i n g in p u t x2 w h i l e x1 is b i as e d a t a n acc u ra te 1 v . th us, w h en v g = 0, th e r e s p o n se t o video in p u t v b is a l r e ady a t i t s f u l l -s c a le v a l u e o f uni t y , w h er e a s w h en v g = 1 v , th e dif f er - en t i al in p u t x1 ?x2 is 0. this gen e r a t e s t h e s e c o nd t e r m . the b i as c u r r en ts r e q u ir e d a t t h e o u t p ut o f t h e m u l t i p liers a r e p r o v ide d b y r8 a nd r9. a dc le vel-sh if t i n g netwo r k co m p r i sin g r10/r12 and r11/r13 en s u r e s tha t t h e in p u t no des o f th e ad811 a r e p o si tio n e d a t a v o l t ag e wi thin i t s comm on-mo d e r a n g e. a t hig h f r e q uen c ies, c1 a nd c2 b y p a ss r10 a nd r11, r e sp e c t i v e l y . r1 4 is in cl ud e d t o lo w e r t h e hf lo o p ga in and is n e e d e d b e c a us e t h e v o l t a g e- t o - c ur r e n t co n v ers i o n i n t h e ad834s, via the y2 in p u ts, r e s u l t s in an ef f e c t i v e val u e o f th e f eed back r e sis t an ce o f 250 ?; this is o n l y a b o u t half th e val u e r e q u ir ed f o r o p tim u m f l a t n e s s in the ad811 s res p o n s e . (n o t e tha t this r e sis t an ce is una f f e c t e d b y g: w h en g = +1, al l th e f eed ba ck i s v i a u 1 , wh il e w h e n g = 0 i t i s all via u 2 ). r 14 re d u c e s t h e f r a c t i on a l a m ou n t of output c u r r e n t f r om t h e m u l t i p liers i n t o t h e c u r r en t- s u mmin g i n v e r t ing in p u t o f t h e ad811 b y s h a r in g i t wi th r8. this r e sis t o r ca n be us e d t o ad j u s t t h e b a ndwi d t h a nd dam p in g f a c t o r to b e st sui t t h e a p plic a t ion. u3 ad811 7 6 4 3 2 + ? x2 x1 +v s w1 y1 y2 w2 ?v s u1 ad834 1234 8765 x2 x1 +v s w1 y1 y2 w2 ?v s u1 ad834 1234 8765 r8 29.4 ? 29.4 ? r9 r12 6.98k ? 6.98k ? r13 r10 2.49k ? c3 fb v out fb v g r6 226 ? r7 45.3 ? +5v ?5 v +5v u4 ad589 r5 113 ? (0 to +1v dc) v a (1v fs) ?5v r4 1.02k ? r3 100 ? r2 174 ? r1 1.87k ? v b (1v fs) +5v ?5v c1 0.1 f 0.1 f 0.1 f 0.1 f r14 see text +5v ?5v c4 c2 r11 2.49k ? load gnd load gnd 200 ? to y2 to pin 6 ad811 setup for driving reverse-terminated load z o z o 200 ? v out inset 00866-e - 048 f i gure 4 8 . a p r a c tic a l vi deo k e y e r cir c ui t
ad811 rev. e | page 17 of 2 0 b y r 11. t o g e n e ra t e t h e 1 v dc n e ede d f o r th e 1?g t e r m , a n ad589 r e f e r e n c e s u p p lies 1.225 v 25 mv t o a v o l t a g e di vider co n s is t - in g o f r e sis t o r s r2 t h r o ug h r4. p o t e n t iomet e r r3 s h o u l d b e ad j u s t e d t o p r o v ide exac t l y 1 v a t t h e x1 i n p u t . i n t h is c a s e , an a r ra n g em e n t is sh own usin g d u a l su p p lies o f 5 v f o r bo th th e ad834 and t h e ad811. als o , th e o v eral l ga in is a r ra n g ed t o b e uni t y a t t h e lo ad w h en i t is dr iv en f r o m a r e v e rs e-ter m ina t e d 75 ? li n e . t h is m e a n s t h a t t h e d u a l v c a ha s t o o p era t e a t a maxim u m ga in o f +2, ra th er tha n +4 as in the v c a c i r c ui t o f f i gur e 47. h o w e v e r , this ca nn ot be ac hiev ed b y lo w e r i n g th e f e e d back r e sis t o r b e ca us e b e lo w a cr i t ical val u e (n o t m u c h les s t h a n 500 ?) th e ad811 s p e aking ma y b e unaccep t ab le . this is b e ca us e t h e do minan t p o le in t h e o p en- lo o p ac r e s p o n s e o f a c u r r en t f eed back am p l if ier is co n t r o l l e d t h i s f e e d b a c k re s i stor . i t wou l d b e p o ss ibl e to op e r a t e a t a g a i n of 4 a nd t h e n a t ten u a t e t h e sig n a l a t t h e o u t p ut. i n s t e a d , t h e sig n als ha v e been a t t e n u a t ed b y 6 db a t the in p u t t o th e ad811; th i s i s th e fun c tio n o f r 8 th r o u g h f i g u re 4 9 i s a pl ot of t h e a c re sp ons e of t h e f e e d b a ck ke y e r w h e n dr i v i n g a r e vers e-t e r m ina t e d 50 ? ca b l e . o u t p ut n o is e an d a d j a cen t c h a n n e l f eed th r o ugh , w i t h ei th e r c h a n n e l full y o f f a n d t h e ot he r f u l l y on , i s ab out ? 5 0 d b to 1 0 m h z . t h e f e e d t h rou g h a t 100 m h z is limi t e d p r ima r il y b y bo a r d la yo u t . f o r v g = 1 v , th e ?3 db ban d wid t h is 15 m h z w h en usin g a 137 ? r e sis t o r f o r r14 a nd 70 m h z wi th r14 = 49.9 ?. f o r m o r e inf o r m a t io n o n t h e desig n and o p er a t ion o f t h e v c a and vide o k e yer cir c ui ts, r e fer t o t h e a p pl ica t ion n o te v ide o v c a s and k e yers: u s i n g t h e ad834 an d ad811 b y b r unn e r , cla r k e , and g i l b er t, a v a i lab l e o n the analog de vices, i n c. w e bsi t e a t ww w . a n a l o g . c o m . ?90 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 10 closed- l oop gain ( d b) frequency (hz) 100k 10k 1m 10m 100m 00866-e - 049 r14 = 49.9 ? r14 = 137 ? gain adjacent channel feedthrough f i g u re 49. a pl ot of t h e a c r e s p ons e of t h e vid e o k e y e r
ad811 rev. e | page 18 of 2 0 outline dimensions seating plane 0.015 (0.38) min 0.180 (4.57) max 0.150 (3.81) 0.130 (3.30) 0.110 (2.79) 0.060 (1.52) 0.050 (1.27) 0.045 (1.14) 8 1 4 5 0.295 (7.49) 0.285 (7.24) 0.275 (6.98) 0.100 (2.54) bsc 0.375 (9.53) 0.365 (9.27) 0.355 (9.02) 0.150 (3.81) 0.135 (3.43) 0.120 (3.05) 0.015 (0.38) 0.010 (0.25) 0.008 (0.20) 0.325 (8.26) 0.310 (7.87) 0.300 (7.62) 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) controlling dimensions are in inches; millimeter dimensions (in parentheses) are rounded-off inch equivalents for reference only and are not appropriate for use in design compliant to jedec standards mo-095aa f i g u re 50. 8-l e ad p l as t i c d u a l in-l ine p a ckag e [p dip ] (n-8) di me nsio ns sho w n i n i n che s a n d ( m il lim e t e r s) controlling dimensions are in inches; millimeter dimensions (in parentheses) are rounded-off inch equivalents for reference only and are not appropriate for use in design 1 4 85 0.310 (7.87) 0.220 (5.59) pin 1 0.005 (0.13) min 0.055 (1.40) max 0.100 (2.54) bsc 15 0 0.320 (8.13) 0.290 (7.37) 0.015 (0.38) 0.008 (0.20) seating plane 0.200 (5.08) max 0.405 (10.29) max 0.150 (3.81) min 0.200 (5.08) 0.125 (3.18) 0.023 (0.58) 0.014 (0.36) 0.070 (1.78) 0.030 (0.76) 0.060 (1.52) 0.015 (0.38) f i gure 51. 8-l e ad cer a m i c d u a l in-l in e p a ckage [ce r di p ] (q - 8 ) di me nsio ns sho w n i n i n che s a n d ( m il lim e t e r s) 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 . 1968) 4. 80 ( 0 . 1890) 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 52. 8-l e ad s t anda r d s m a l l o u t l ine p a ckag e [soic ] 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) 1 20 4 9 8 13 19 14 3 18 bottom view 0.028 (0.71) 0.022 (0.56) 45 typ 0.015 (0.38) min 0.055 (1.40) 0.045 (1.14) 0.050 (1.27) bsc 0.075 (1.91) ref 0.011 (0.28) 0.007 (0.18) r typ 0.095 (2.41) 0.075 (1.90) 0.100 (2.54) ref 0.200 (5.08) ref 0.150 (3.81) bsc 0.075 (1.91) ref 0.358 (9.09) 0.342 (8.69) sq 0.358 (9.09) max sq 0.100 (2.54) 0.064 (1.63) 0.088 (2.24) 0.054 (1.37) controlling dimensions are in inches; millimeter dimensions (in parentheses) are rounded-off inch equivalents for reference only and are not appropriate for use in design f i g u re 53. 2 0 - t e r m i nal cer a mi c l e ad le s s chip ca rr ier [ l c c ] (e-20a) di me nsio ns sho w n i n i n che s a n d ( m il lim e t e r s)
ad811 rev. e | page 19 of 2 0 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-013aa seating plane 0.30 (0.0118) 0.10 (0.0039) 0.51 (0.0201) 0.31 (0.0122) 2.65 (0.1043) 2.35 (0.0925) 1.27 (0.0500) bsc 16 9 8 1 10.65 (0.4193) 10.00 (0.3937) 7.60 (0.2992) 7.40 (0.2913) 10.50 (0.4134) 10.10 (0.3976) 8 0 0.75 (0.0295) 0.25 (0.0098) 45 1.27 (0.0500) 0.40 (0.0157) 0.33 (0.0130) 0.20 (0.0079) coplanarity 0.10 f i gure 54. 16-l ead standar d s m all o u tline p a ck age [s oi c ] w i de body (r - 1 6) di me nsio ns sho w n i n mi ll im e t e r s a n d (i nc he 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 compliant to jedec standards ms-013ac 0.75 (0.0295) 0.25 (0.0098) 20 11 10 1 8 0 45 1.27 (0.0500) 0.40 (0.0157) seating plane 0.30 (0.0118) 0.10 (0.0039) 0.51 (0.0201) 0.31 (0.0122) 2.65 (0.1043) 2.35 (0.0925) 0.33 (0.0130) 0.20 (0.0079) 1.27 (0.0500) bsc 10.65 (0.4193) 10.00 (0.3937) 7.60 (0.2992) 7.40 (0.2913) 13.00 (0.5118) 12.60 (0.4961) coplanarity 0.10 f i gure 55. 2 0 -l ead s tanda r d s m al l o u tline p a ckage [s oi c ] w i de body (r - 2 0) di me nsio ns sho w n i n mi ll im e t e r s a n d (i nc he s)
ad811 rev. e | page 20 of 2 0 ordering guide model temperature r a nge package descri ption package option ad811an ?40c to +85c 8-lead plasti c dual in-line package (pdip) n-8 ad811anz 1 ?40c to +85c 8-lead plastic du al in-line package (pdip) n-8 ad811ar-16 ?40c to +85c 16-leadstanda rd small outline package (soic) r-16 ad811ar-16-re el ?40c to +85c 16-leadstanda rd small outline package (soic) r-16 ad811ar-16-re el7 ?40c to +85c 16-leadstan dard small outline package (soic) r-16 ad811ar-20 ?40c to +85c 20-leadstanda rd small outline package (soic) r-20 ad811ar-20-re el ?40c to +85c 20-leadstanda rd small outline package (soic) r-20 ad811jr 0c to +70c 8-leadstandard small outline p a ckage (soic) r-8 ad811jr-reel 0c to +70c 8-leadstanda rd small outline p a ckage (soic) r-8 ad811jr-reel7 0c to +70c 8-leadstanda rd small outline p a ckage (soic) r-8 ad811jrz 1 0c to +70c 8-leadstandard sm all outline p a ckage (soic) r-8 ad811sq/883b ?55c to +125c 8-lead cera mic dual in-line package (cerdip) q-8 5962-9313101mpa ?55c to +125c 8-lead ceramic dual in-line package (cerdip) q-8 ad811se/883b ?55c to +125c 20-terminal cer a mic leadless chip carrier (lcc) e-20a 5962-9313101m2a ?55c to +125c 20- terminal cer a mic leadless chip carrier (lcc) e-20a ad811achips ?40c to +85c die ad811schips ?55c to +125c die 1 z = pb-free part. ? 2004 a n alo g devic e s, inc. all rig h ts res e rve d . t r ade m arks a n d re g i s - tered trade m arks are the property of their respective owners . c00866C0 C 7/04(e)

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