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el4393c january 1996 rev b el4393c triple 80 mhz video amplifier w/disable note: all information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a ``controlled document''. current revisions, if any, to these specifications are maintained at the factory and are available upon your request. we recommend checking the revision level before finalization of your design documentation. ? 1993 elantec, inc. features # 80 mhz b 3 db bandwidth for gains of 1 to 10 # 900 v/ m s slew rate # 10 mhz bandwidth flat to 0.1 db # excellent differential gain and phase # ttl/cmos compatible # available in sol-16 applications # rgb drivers # rgb multiplexers # rgb gain blocks # video gain blocks # coax cable driver # adc drivers/input multiplexer ordering information part no. temp. range package outline y el4393cn b 40 cto a 85 c 16-lead p-dip mdp0031 EL4393CM b 40 cto a 85 c 16-lead sol mdp0027 general description the el4393c is three wideband current-feedback amplifiers op- timized for video performance. each amplifier can drive a load of 150 x at video levels. each amplifier has a disable capability, which is controlled by a ttl/cmos compatible logic signal. the el4393c operates on supplies as low as g 4v up to g 15v. being a current-feedback design, the bandwidth stays relatively constant at approximately 80 mhz over the g 1to g 10 gain range. the el4393c has been optimized for use with 1300 x feedback resistors at a gain of 2. when the outputs are disabled, the supply current consumption drops, by about 4 ma per channel that is disabled. this feature can be used to reduce power dissipation. connection diagram 4393 1
el4393c triple 80 mhz video amplifier w/disable absolute maximum ratings (t a e 25 c) voltage between v s a and v s b a 33v voltage at v s a a 18v voltage at v s b b 18v voltage between v in a and v in b g 6v current into v in a or v in b 5ma internal power dissipation see curves operating ambient temperature range b 40 cto a 85 c operating junction temperature 150 c storage temperature range b 65 cto a 150 c important note: all parameters having min/max specifications are guaranteed. the test level column indicates the specific device testing actually performed during production and quality inspection. elantec performs most electrical tests using modern high-speed automatic test equipment, specifically the ltx77 series system. unless otherwise noted, all tests are pulsed tests, therefore t j e t c e t a . test level test procedure i 100% production tested and qa sample tested per qa test plan qcx0002. ii 100% production tested at t a e 25 c and qa sample tested at t a e 25 c, t max and t min per qa test plan qcx0002. iii qa sample tested per qa test plan qcx0002. iv parameter is guaranteed (but not tested) by design and characterization data. v parameter is typical value at t a e 25 c for information purposes only. open loop dc electrical characteristics supplies at g 15v, load e 1k x parameter description temp min typ max test units level v os input offset voltage a 25 c2 g 15 i mv tcv os temperature coefficient of v os full 50 v m v/ c i b a i in a input bias current a 25 c 0.2 5 i m a i b b i in b input bias current a 25 c1065i m a tci b b temperature coefficient of i b b full 25 v na/ c cmrr common-mode rejection ratio a 25 c50 58 i db (note 1) b icmr i in b input common-mode current a 25 c38i m a/v (note 1) psrr power supply rejection ratio a 25 c50 58 i db (note 2) b ipsr i in b current supply rejection a 25 c25i m a/v (note 2) r ol transimpedance a 25 c 100 217 i k x r in in a input impedance a 25 c2 im x v in in a input range a 25 c g 13 g 13.5 i v v o output voltage swing; a 25 c g 12 g 13 i v r l e 1k x 2 td is 3.4in
el4393c triple 80 mhz video amplifier w/disable open loop dc electrical characteristics supplies at g 15v, load e 1k x e contd. parameter description temp min typ max test units level i sc short-circuit current (note 3) a 25 c40 70 i ma i o, dis output current when disabled a 25 c 5 150 i m a dis v il disable voltage for logic low a 25 c 0.8 i v dis v ih disable voltage for logic high a 25 c 2.2 i v dis i il disable logic low input current a 25 c 3 25 i m a dis i ih disable logic high input current a 25 c05i m a i cc (en) positive supply current all a 25 c15 20 g 29 i ma channels enabled i cc (dis) positive supply current all a 25 c 6 11 16 i ma channels disabled i ee (en) negative supply current all a 25 c13 18 g 28 i ma channels enabled i ee (dis) negative supply current all a 25 c4 9 14 i ma channels disabled note 1: v cm e g 10v for v s e g 15v. note 2: v os is measured at v s e g 4.5v and v s e g 16v, both supplies are changed simultaneously. note 3: only one output short circuited. pulse test or use heatsink. closed loop ac electrical characteristics supplies at g 15v, load e 150 x and 15 pf, except where noted. rf1 and rf2 e 1500 x ;a v e 2, t a e 25 c. (see note 8 re: test fixture) parameter description min typ max test units level sr slew rate (note 4) 960 v v/ m s sr slew rate w/ g 5v supplies (note 5) 470 iv v/ m s t s settling time to 1% 5v p-p 5v step (note 6) 32 v ns bw bandwidth, b 3 db 80 iv mhz g 5v supplies, b 3 db 60 iv mhz bw bandwidth, b 0.1 db 16 iv mhz g 5v supplies, b 0.1 db 21 iv mhz peaking b 3 db bw tests 0.6 iv db dg differential gain at 3.58 mhz 0.03 v % at g 5v supplies (note 7) 0.30 v % d i differential phase at 3.58 mhz 0.088 v ( ) at g 5v supplies (note 7) 0.096 v ( ) note 4: r l e 300 x , b 5v to a 5v swing, sr measured at 20% to 80%. note 5: b 2v to a 2v swing, sr measured at 20% to 80%. note 6: r l e 300 x . note 7: dc offset from b 0.7v through a 0.7v ac amplitude is 286 mv p-p , equivalent to 40 ire. note 8: test fixture was designed to minimize capacitance at the i n a input. a ``good'' fixture should have less than 2 pf of stray capacitance to ground at this very sensitive pin. see application notes for further details. 3 td is 2.7in td is 2.4in
el4393c triple 80 mhz video amplifier w/disable typical performance curves gain flatness vs rf at g 5v gain flatness vs rf at g 15v phase vs rf at g 5v phase vs rf at g 15v rg at g 5v gain of 5, 10 vs various rf, rg at g 15v gain of 5, 10 vs rf, 4393 3 4
el4393c triple 80 mhz video amplifier w/disable typical performance curves e contd. isolation test at g 5v disabled isolation test at g 15v disabled cinevs peaking voltage noise at 3.58 mhz differential gain & phase channel isolation el4393 mux channel 4393 11 5
el4393c triple 80 mhz video amplifier w/disable typical performance curves e contd. vs supply voltage supply current 16-pin pdip vs ambient temperaturee maximum power dissipation 16-pin sol vs ambient temperaturee maximum power dissipation 4393 4 small signal pulse response 4393 5 large signal pulse response 4393 6 enable/disable with a ve voltage output 4393 7 enable/disable with b ve voltage output 4393 8 6
el4393c triple 80 mhz video amplifier w/disable typical application for el4393, and general rules for pcb layout the figure shows two el4393's configured as a 2:1 rgb multiplexer, and cable driver, driving 75 x , back terminated cables. each channel of the el4393 is configured to give a gain of two, to make up for the losses of the back terminating resistor. in this example, the disable pins of each rgb section are driven by a complementary ttl ``se- lect'' signal. larger multiplexers can be assem- bled, with a 1-of-n ttl decoder selecting each rgb triplet. the circuit gives channel isolations of typically better than b 50 db at 10 mhz, and with a 20 db/decade slope, extending down to better than b 90 db at frequencies below 100 khz. the schematic does not show things like power supply decoupling, or pcb layout, grounding and signal returns, but these will all affect the overall performance of the circuit, and care should be taken with these aspects. it is recommended that the v cc and v ee pins each be decoupled by a 0.1 m f npo or x7r di- electric ceramic capacitors to ground within 0.1 inch of the part, and in parallel with the 0.1 m f, a47 m f tantalum capacitor, also to ground. the 47 m f capacitors should be within 0.25 inch of their power pins. the ground plane should be un- derneath the package, but cut away from the in b inputs. care should be taken with the center channel feedbackeit must be kept away from any of the in a or in b pins, if it has to go under the package. route the g-out line between the pin 3 ground and the pin 4 in b if going under the package is essential. otherwise, loop the g- out trace around all the other circuitry, to its rf resistor. the rf and if used, rg resistors should be on the input side of the package, to minimize trace length on the in b pins. the digital input disables are on the output side of the package, so that a good ground plane down the center of the board underneath the package will isolate any fast edges from the sensitive in- puts. 7
el4393c triple 80 mhz video amplifier w/disable 4393 2 typical application circuit 8
el4393c triple 80 mhz video amplifier w/disable el4393c macromodel * revision a, july 1993 * enhancements include psrr, cmrr, and slew rate limiting * connections: a input * l b input * ll a vsupply * lll b vsupply * llll putput * lllll * subckt el4393/el 32746 * * input stage * e1100301.0 vis 10 9 0v h2 9 12 vxx 1.0 r121150 l1111229nh iinp 3 0 0.2 m a iinm2010 m a * * slew rate limiting * h1 13 0 vis 600 r2 13 14 1k d1 14 0 dclamp d2 0 14 dclamp * * high frequency pole * e2 30 0 14 0 0.00166666666 l5 30 17 1.2 m h c51701pf r5 17 0 500 * * transimpedance stage * g10181701.0 rol 18 0 250k cdp 18 0 2.2 pf * * output stage * q141819qp q271820qn q371921qn q442022qp r7 21 6 4 r8 22 6 4 ios1 7 19 2.5 ma ios2 20 4 2.5 ma * * error terms * ivos0232ma vxx 23 0 0v e4240301.0 e5250701.0 e6260401.0 r9 24 23 1k r10 25 23 1k r11 26 33 1k * * models * .model qn npn (is e 5e b 15 bf e 100 tf e 0.2ns) .model qp pnp (is e 5e b 15 bf e 100 tf e 0.2ns) .model dclamp d (is e 1e b 30 ibv e 0.266 bv e 1.5 n e 4) .ends 9 tab wide td is 5.3in tab wide td is 3.6in
el4393c triple 80 mhz video amplifier w/disable el4393c macromodel e contd. 4393 9 4393 10 simplified schematic of one channel of el4393 10
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el4393c january 1996 rev b el4393c triple 80 mhz video amplifier w/disable general disclaimer specifications contained in this data sheet are in effect as of the publication date shown. elantec, inc. reserves the right to make changes in the circuitry or specifications contained herein at any time without notice. elantec, inc. assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement. elantec, inc. 1996 tarob court milpitas, ca 95035 telephone: (408) 945-1323 (800) 333-6314 fax: (408) 945-9305 european office: 44-71-482-4596 warning e life support policy elantec, inc. products are not authorized for and should not be used within life support systems without the specific written consent of elantec, inc. life support systems are equipment in- tended to support or sustain life and whose failure to perform when properly used in accordance with instructions provided can be reasonably expected to result in significant personal injury or death. users contemplating application of elantec, inc. products in life support systems are requested to contact elantec, inc. factory headquarters to establish suitable terms & conditions for these applications. elantec, inc.'s warranty is limited to replace- ment of defective components and does not cover injury to per- sons or property or other consequential damages. printed in u.s.a. 12

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