LM1203-N

LM1203-N TI1 | Alldatasheet

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LM1203 RGB Video Amplifier System Literature Number: SNOSC07A

LM1203 RGB Video Amplifier System January 1996 LM1203 RGB Video Amplifier System General Description The LM1203 is a wideband video amplifier system intended for high resolution RGB color monitor applications. In addi- tion to three matched video amplifiers, the LM1203 contains 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 or ‘‘Drive’’ node for setting maximum system gain (Av e 4 to 10) as well as providing trim capability. The LM1203 also contains a voltage reference for the video inputs. For high resolution monochrome monitor applications see the LM1201 Video Amplifier System datasheet.

Features

Y Three wideband video amplifiers (70 MHz @ b3dB) Y Inherently matched ( g0.1 dB or 1.2%) attenuators for contrast control Y Three externally gated comparators for brightness con- trol Y Provisions for independent gain control (Drive) of each video amplifier Y Video input voltage reference Y Low impedance output driver Block and Connection Diagram TL/H/9178–1 FIGURE 1 Order Number LM1203N See NS Package Number NA28F C1996 National Semiconductor Corporation RRD-B30M56/Printed in U. S. A. Obsolete

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage, V CC Pins 1, 13, 23, 28 (Note 1) 13.5V Voltage at Any Input Pin, V IN VCC t VIN t GND Video Output Current, I16, 20 or 25 28 mA Power Dissipation, P D 2.5W (Above 25 §C) Derate Based on iJA and T J Thermal Resistance, iJA 50§C/W Junction Temperature, T J 150§C Storage Temperature Range, T STG b65§Ct o a150§C Lead Temperature, (Soldering, 10 sec.) 265§C ESD susceptibility 1 kV Human body model: 100 pF discharged through a 1.5 k X resistor Operating Ratings (Note 9) Temperature Range 0 §Ct o7 0 §C Supply Voltage (V CC) 10.8V s VCC s 13.2V DC Static Tests S17, 21, 26 Open; V12 e 6V; V14 e 0V; V15 e 2.0V unless otherwise stated Label Parameter Conditions Typ Tested Design Units Limit (Note 2) Limit (Note 3) (Limits) Is Supply Current VCC 1 only 73 90.0 mA(max) V11 Video Input Reference Voltage 2.4 2.2 V(min)

2.6 V(max)

lb Video Input Bias Current Any One Amplifier 5.0 20 mA(max) V14 l Clamp Gate Low Input Voltage Clamp Comparators On 1.2 0.8 V(max) V14 h Clamp Gate High Input Voltage Clamp Comparators Off 1.6 2.0 V(min) I14 l Clamp Gate Low Input Current V14 e 0V b0.5 b5.0 mA(max) I14 h Clamp Gate High Input Current V14 e 12V 0.005 1 mA(max) lclampa Clamp Cap Charge Current V5, 8 or 10 e 0V 850 500 mA(min) lclampb Clamp Cap Discharge Current V5, 8 or 10 e 5V b850 b500 mA(min) Vol Video Output Low Voltage V5, 8 or 10 e 0V 0.9 1.25 V(max) Voh Video Output High Voltage V5, 8 or 10 e 5V 8.9 8.2 V(min) DVo(2V) Video Output Offset Voltage Between Any Two Amplifiers g0.5 g50 mV(max)V15 e 2V DVo(4V) Video Output Offset Voltage Between Any Two Amplifiers g0.5 g50 mV(max)V15 e 4V AC Dynamic Tests S17, 21, 26 Closed; V14 e 0V; V15 e 4V; unless otherwise stated Symbol Parameter Conditions Typ Tested Design Units Limit (Note 2) Limit (Note 3) (Limits) Av max Video Amplifier Gain V12 e 12V, V IN e 560 mVp-p 6.0 4.5 V/V(min) DAv 5V Attenuation @ 5V Ref: Av max, V12 e 5V b10 dB DAv 2V Attenuation @ 2V Ref: Av max, V12 e 2V b40 dB Av match Absolute gain match @ Av max V12 e 12V (Note 5) g0.5 dB DAv track1 Gain change between amplifiers V12 e 5V (Notes 5, 8) g0.1 g0.5 dB(max) DAv track2 Gain change between amplifiers V12 e 2V (Notes 5, 8) g0.3 g0.7 dB(max) THD Video Amplifier Distortion V12 e 3V, V O e 1 Vp-p 0.5 % f( b3 dB) Video Amplifier Bandwidth V12 e 12V, 70 MHz(Notes 4, 6) VO e 100 mV rms tr Output Rise Time (Note 4) V O e 4 Vp-p 5 ns tf Output Fall Time (Note 4) V O e 4 Vp-p 7 ns http:/ /www.national.com 2 Obsolete

Note 1: VCC supply pins 1, 13, 23, 28 must be externally wired together to prevent internal damage during V CC power on/off cycles. Note 2: These parameters are guaranteed and 100% production tested. Note 3: Design limits are guaranteed (but not 100% production tested). These limits are not used to calculate outgoing quality levels. ed. Video Amplifier 10 MHz isolation test also requires this printed circuit board. Note 5: Measure gain difference between any two amplifiers. V IN e 1 Vp-p. Note 6: Adjust input frequency from 10 kHz (Av max ref level) to the b3 dB corner frequency (f b3 dB). inputs to simulate generator loading. Repeat test at f IN e 10 MHz for Vsep e 10 MHz. measured typical g0.1 dB channel tracking. Note 9: Operating Ratings indicate conditions for which the device is functional. See Electrical Specifications for guaranteed performance limits. using various peaking cups graph on next page. FIGURE 2. LM1203 Test Circuit

Typical Performance Characteristics Contrast vs Frequency TL/H/9178–11 Crosstalk vs Frequency TL/H/9178–12 Frequency Response Using Various Peaking Caps TL/H/9178–13 Attenuation vs Contrast Voltage TL/H/9178–14 Pulse Response Rise & Fall Times Vert. e 1V/Div. Horiz. e 10 ns/Div. – – GND TL/H/9178–15 http:/ /www.national.com 4 Obsolete

FIGURE 3. LM1203 Typical Application over 100 X the rise and fall times of the LM1203 can be increased for EMI considerations.

FIGURE 6. Simplified LM1203 Video Amplifier Section with Recommended External Components

FIGURE 11. LM1203/LM1881 Application Circuit for PC Board

TL/H/9178–17 http:/ /www.national.com 14 Obsolete

http:/ /www.national.com15 Obsolete

LM1203 RGB Video Amplifier System Physical Dimensions inches (millimeters) unless otherwise noted Lit. Ý 107315 28-Lead Molded Dual-In-Line Package (N) Order Number LM1203N LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd.

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Arlington, TX 76017 Email: europe.support @ nsc.com Ocean Centre, 5 Canton Rd. Fax: 81-043-299-2408 Tel: 1(800) 272-9959 Deutsch Tel: a49 (0) 180-530 85 85 Tsimshatsui, Kowloon Fax: 1(800) 737-7018 English Tel: a49 (0) 180-532 78 32 Hong Kong Fran3ais Tel: a49 (0) 180-532 93 58 Tel: (852) 2737-1600 http:/ /www.national.com Italiano Tel: a49 (0) 180-534 16 80 Fax: (852) 2736-9960 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. Obsolete

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