BW (-3 dB)... 70 MHz Matched =+0.5-dB Attenuators for Contrast Control Three Externally-Gated Comparators for Brightness Control Independent Gain Control of Each Video Amplifier... Ay = 4 to 10 * Video Input Voltage Reference * Low-Impedance Output Driver ESD Protection Exceeds 2000 V Per MIL Standard 833C, Method 3015 * Designed to Be an Improved Replacement for National Semiconductor LM1203 description SOE D M@ 8961724 0088302 aTS METIT4 TEXAS INSTR (LIN/INTFC) LM1203, LM1203A RGB VIDEO AMPLIFIER SYSTEMS D3429, MARCH 1990 REVISED OCTOBER 1991 NPACKAGE J ~ 74-07-O( (TOP VIEW) Voerl] 1 zal] Veer CONTRAST CAP[] 2 27{] R GAIN ADJUST CONTRAST CAP[] 3 261] R CLAMP(-) R VIDEO IN] 4 25{] R VIDEO OUT R CLAMP CAP[] 5 24[] R CLAMP(+) G VIDEO IN{] 6 231] Voce GNDI]j7 ~_ 22] G GAIN ADJUST G CLAMP CAP[] 8 21[{] G CLAMP(-) BVIDEOIN[}9 = 20[] G VIDEO OUT BCLAMP CAP[} 10 -19[] G CLAMP(+) REF[} 11 18[] B GAIN ADJUST CONTRAST[] 12 -17[] B CLAMP(-) Vecil] 13-16] B VIDEO OUT CLAMP GATE[] 14 ~ 15] B CLAMP(+) The LM1203 and LM1203A are wide-band video amplifier systems intended for high-resolution RGB color monitor applications. In addition to three matched video amplifiers, the LM1203 and LM1203A contain three gated differential input black-level clamp comparators for brightness control and three matched attenuator circuits for contrast control. Each video amplifier contains a gain set for adjusting maximum system gain (Ay = 4 to 10) as well as providing trim capability. The LM1203 and LM1203A also contain a voltage reference for the video inputs. The LM1203 and LM1203A are characterized for operation from 0C to 70C. [ PRODUCTION DATA information is current as of publication date. Products conform to specifications the terms of Texas Instruments standard warranty. roduction processing does not necessarily Include testing of all parameters. POST OFFICE BOX 658303 DALLAS, TEXAS 75265 Copyright 1991, Texas Instruments IncorporatedTEXAS INSTR (LIN/INTFC) SOE D MM 8961724 0088303 731 MBTIIY LM1203, LM1203A RGB VIDEO AMPLIFIER SYSTEMS T-74- 07-01 a functional block diagram Voc Vec1 CONTRAST CAP CONTRAST CAP R VIDEO IN R VIDEO OUT R CLAMP CaP R GAIN ADJUST R CLAMP(-) R CLAMP(+) Vv G VIDEO IN @ viDEO OUT G CLAMP G GAIN ADJUST GND GCLAMP(-) G CLAMP(4) B VIDEO IN B VIDEO OUT B CLAMP B GAIN ADJUST B CLAMP(- REF B CLAMP(:+) CONTRAST Vec1 CLAMP GATE absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, Voc (see Note 1) o.oo ccc cece cece secu eee ceeebne cere, Input voltage range, Vj wee ccc cece eee e eet e be bbb bebe bee c eee. Voc 2 V2 GND Video output current 0.0... cece c cee ccc eet t tebe bbb bbb tbe terre Total power dissipation at (or below) 25C free-air temperature (see Note 2) ........0.. 0... eee ee Operating junction temperature 2.00. c cece eee teense bees been eceee ecco co. 0C to 70C Storage temperature range oo... cece c cece c cece cence cece beeneeccccc, 65C to 150C NOTES: 1. All Voc pins must be externally wired together to prevent internal damage during Voc power-on/off cycles. 2. For operating above 25C free-air temperature, derate linearly at the rate of 20 mW/C. TEXAS % INSTRUMENTS 2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265TEXAS INSTR (LIN/INTFC) 5O& Dd LM1203, LM1203A RGB VIDEO AMPLIFIER SYSTEMS electrical characteristics at 25C free-air temperature, Vio = 6 V, Viq = 0, Vig = 2 V, Me 4961724 0088304 676 METIIT4 Vcc1 = Vcc2 = 12 V (see Figure 1) (unless otherwise noted) T- 74-27 -o / PARAMETER TEST CONDITIONS MIN TYP MAX! UNIT loc Supply current Veci only 60 90; mA Vref Video input reference voltage 2.2 2.4 2.6 Vv iB Video input bias current Any amplifier 5 20 pA VIL(14) Clamp gate low-level input voltage Clamp comparators on 0.8 1.2 Vv VIH(14) Clamp gate high-level input voltage Clamp comparators off 1.6 2 Vv NL(14) Clamp gate low input current V1i4=0 -0.5 -5 pA NH(14) Clamp gate high input current Vie=Voc 0.005 1 vA Ik(chg) Clamp capacitor charge current V5.8 or 10=9 850 pA 'K(dschg) Clamp capacitor discharge current V5,80r10=5V 850 vA VOL Low-level output voltage V5.8 0r10=0 1.2 Vv VOH High-level output voltage V5 80r10=5V 8.9 v VOdiff Output voltage difference between any two channels 7 : : - +05 +50} mV operating characteristics at 25C free-air temperature, V1q = 0 V, Vis = 4 V, fin = 10 kHz (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX] UNIT Avmax Maximum voltage amplification |V4o=12V, Vi(PP) = 560 mV ro A os VN Avmid Mid-range voltage amplification | Vj2=5V, Vi(PP) = 560 mV es A - 3 VN Vi2low amplification = forminimum | Vipp) = 1, | See Note3 2 V Avmax(diff) Amplification match at Ay max | Via = 12, See Note 4 20.2 dB Avmid(diff) Amplification match at Ay mid | V12 =5V, See Note 3 +0,2 dB Aviow(diff} Amplification match at Ay low | V12=Viziow, See Notes 3 and 4 +0.2 dB THD Total harmonic distortion Vi2=3V, VPP) =1V 0.5 % BW(-3dB) Amplifier bandwidth Vi2=12V, See Notes 5 and 7 70 MHz Vi2=12V, f = 10 kHz, See Note 6 60 ay Crosstalk attenuation Vi2=12V, f= 10 MHz, 40 dB See Notes 6 and 7 NOTES: 3. Determine V12I9w for 40-dB attenuation of output. Reference to Ay maximum. 4, Measure gain difference between any two amplifiers, Vi(ppy = 1 V. 5. Adjust input frequency from 10 kHz (Ay maximum ref level) to the -3-dB corner frequency (f -3 dB). V\(pp) = 560 mV. 6. Vi(ppy) = 560 mV at f= 10 kHz to any amplifier. Measure output levels of the other two undriven amplifiers relative to driven amplifier to determine channel separation. Terminate the undriven amplifier inputs to simulate generator loading. Repeat test at f = 10 MHz for ay = 10 MHz. 7. Aspecial text fixture without a socket is required. TEXAS wy INSTRUMENTS POST OFFICE BOX 655303 * DALLAS, TEXAS 75265LM1203, LM1203A RGB VIDEO AMPLIFIER SYSTEMS 7- PS-o 7-0 / TEXAS INSTR CLIN/INTFC) SOE >D mi S5bh%?24 UUSssuS 504 MBTIIY Vec 0.01 uF QS 12V DHA Veet Voe1 [22 7E 10 uF CONTRAST CAP R GAIN ADuusT {~~ 26 $26 100 2 a O CONTRAST CAP FR CLAMP(-) oY os pF = RIN 1oka2 L R VIDEO IN R VIDEO out |22-+~ # ROUT . 330 Q 2 5 5 uF = CH -4 revamp cap RCLAMP(+) }22 L GIN = +e * GVIDEOIN DUT. Vec2 = LEVEL 50.2 5 10 kQ T33Ka Mis = a 7 22 o Gnp G GAIN ADJUST ~ $21 01 uF G cLamp(-) }21-1-o jim 5 uF Cok Gctampe cap o1ur| = BIN -@) = 10kQ > 0.1 uF \ 9 20 \@ B VIDEO IN G VIDEO OUT # GOUT 3 50 2 10 kQ 330 2 = 0.1 HF 40 19 Va4 er ot B CLAMP CAP GCLAMP(s) |___-# = 1 wl = | ri p 1 1 = Lett REF B GAIN ADgusT ONTRAST = S pF V12 . 12 17 $17 100 oO CONTRAST B CLAMP(-) Oo otuel = - 0.1 pF 10 kQ = 0.01 uF Oh 13] Voc1 B VIDEO ouT [16 | 4 B OUT " 330 Q CLAMP GATE 14) 1 2 Via GA CLAMP GATE B CLAMP(+) $ = Figure 1. Test Circuit TEXAS % INSTRUMENTS POST OFFICE BOX 655303 DALLAS, TEXAS 75265LM1203, LM1203A RGB VIDEO AMPLIFIER SYSTEMS TEXAS INSTR (LIN/INTFC) SOE D M@@ 8961724 0088306 440 MBTITY Figure 2. Typical Application TEXAS INSTRUMENTS % POST OFFICE BOX 655303 DALLAS, TEXAS 75265 e re \? 1. TF 2Y-07-6/ + 0.1 pF-T- YS 7T 100 uF . 4 Vec1 Vec1 28 - Red Drive OK contrast cap R GAIN ADJUST ae % 0.1 uF 26 . LAMP(- > ot] contrast cap RCLAMP() To Red 5 uF * Cascode R p 4 25 Driver VIDEO R VIDEO IN R VIDEO OUT > 10 kQ IN 75a 390 Q L : O.1uF 24 CF} RcLAMP CAP R CLAMP(+) = To HV 5 uF = Supply G 6 23 1kQ VIDEO* if G VIDEO IN Vece2 VIDEO OUT IN 3 752 | $ 10kQ Green Drive 60 V P-P = 51Q 7 rr 4 GND G GAIN ADuust 122 A wot To WW = = upply Onur 8 G cLamp(-) }2! OK] a ctamp cap o B 5 pF 9 20 Green VIDEO? * B VIDEO IN G VIDEO OUT + culo Cascode IN $750 10 kQ 390 2 iter river : oH B CLAMP CAP G campy) 2 = 512 ~ 0.1 pF + L 1 co + 1 per B GAIN ADuusT E> ww 5 uF 2S 912 + 12 17 CONTRAST B CLAMP(-) ToBI > o Blue Cascode Driver 13 16 Vv Vv T 4 > Too cC1 B VIDEO OU = uF 14 is | | 9002 Max CLAMP GATE B CLAMP(+) + 10 kQ Contrast oot Black Level -_ . B MIN 7 uF 10 kQ toke Coon 1 4 10 kQ , BLACK LEVEL AE 0.01 pF GATE IN =LM1203, LM1203A ah no - RGB VIDEO AMPLIFIER SYSTEMS 77#-07-0f TEXAS INSTR (LIN/INTFC) 5OE D MM 4961724 00886307 38? MBTII4 12 V-e* i i 100 uF 1 13 from Vec1 Vect LM1203A a CONTRAST she a CAP e yl 2 L 0.02 url 3 VIDEO fk Q3 04 . IN ~ 4,6,or9 Q1 10 pF 75.23 OMFS OL | 2 Q5 1 . R1 R2 T | 1.6k2 *5000 35 | 16 kQ a _ y i Opt onal} 7 5,8,0r10 Clamp T Cap 0.1 uF 512 fora woo} } = = = *-V < 100 22 To Clamp Comparator (-) Input = or 9 . To Clamp Comparator (+) Input 4 i Figure 3. Simplified Video Amplifier Section With Recommended External Components @ Vec1 R21 R23 R27A R28 To Video Input 4.3 kQ kQ 320 Q 12 kQ 10 kQ z3 Q15A Qi7 Q13 D1 R29 > 12 CONTRAST Q14 aka ae CONTROL Ree = CONTRAST 5 kQ 3- b2 ? cap x D3 = Gis aie 2g CONTRAST x= R22 D4 R25 R26 R27 R30 = 1kQ 128Q 710kQ 47 kO 10 kQ {Tl Figure 4. Input Voltage Reference and Contrast Control Circuits a a a nS TEXAS ap INSTRUMENTS 6 POST OFFICE BOX 655303 DALLAS, TEXAS 75265LM1203, LM1203A RGB VIDEO AMPLIFIER SYSTEMS TEXAS INSTR (LIN/INTFC) SOE D MM 8561724 00848308 213 MTII4 veer J-7407-0/ -- 5,8,or 10 R23 20 kQ 17,21, or 28 is CLAMP- CLAMP GATE O18 15,19, or 24 CLAMP+ a21 Qt19 Q26 R23 To Other Channels 5k fT} Figure 5. Simplified Schematic of LM1203A Clamp Gate (Common to Each Channel) and Clamp Comparator Circuits i TEXAS wy INSTRUMENTS POST OFFICE BOX 655303 DALLAS, TEXAS 75265 7