LM2202

230 MHz Video Amplifier System

General Description

The LM2202 is a very high frequency video amplifier system

intended for use in high resolution monochrome or RGB

color monitor applications. In addition to the wideband video

amplifier the LM2202 contains a gated differential input black

level clamp comparator for brightness control, a DC con-

trolled attenuator for contrast control and a DC controlled

sub contrast attenuator for drive control. The DC control for

the contrast attenuator is pinned out separately to provide a

more accurate control system for RGB color monitor applica-

tions. All DC controls offer a high input impedance and oper-

ate over a 0V to 4V range for easy interface to bus controlled

alignment systems. The LM2202 operates from a nominal

12V supply but can be operated with supply voltages down

to 8V for applications that require reduced IC package power

dissipation characteristics.

Features

n Wideband video amplifier

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n Externally gated comparator for brightness control

n 0V to 4V high input impedance DC contrast control

n 0V to 4V high input impedance DC drive control

n Easy to parallel three LM2202s for optimum color

tracking in RGB systems

n Output stage clamps to 0.65V and provides up to 9V

output voltage swing

n Output stage directly drives most hybrid or discrete CRT

amplifier stages

n Replacement for the LM1202

Applications

n High resolution CRT monitors

n Video switches

n Video AGC amplifier

n Wideband amplifier with gain and DC offset control

Block and Connection Diagram

DS012591-1

Order Number LM2202N or LM2202M

See NS Package Number N20A or M20B

April 1999

© 1999 National Semiconductor Corporation

DS012591

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