LM1202 Datasheet, PDF (1/18 Pages) National Semiconductor (TI) – LM1202 230 MHz Video Amplifier System

December 1995
LM1202 230 MHz Video Amplifier System
General Description
The LM1202 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 LM1202 contains a gated differential input
black level clamp comparator for brightness control a DC
controlled attenuator for contrast control and a DC con-
trolled 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 applications All DC controls offer a high input im-
pedance and operate over a 0V to 4V range for easy inter-
face to bus controlled alignment systems The LM1202 op-
erates from a nominal 12V supply but can be operated with
supply voltages down to 8V for applications that require re-
duced IC package power dissipation characteristics
Features
Y _{Wideband video amplifier}
(fb_3dB e 230 MHz at V_O e 4 V_PP)
Y _{tr tf} e _{1 5 ns at VO} e _{4 VPP}
Y _{Externally gated comparator for brightness control}
Y _{0V to 4V high input impedance DC contrast control}
(^l40 dB range)
Y _{0V to 4V high input impedance DC drive control}
(g3 dB range)
Y _{Easy to parallel three LM1202s for optimum color track-}
ing in RGB systems
Y _{Output stage clamps to 0 65V and provides up to 9V}
output voltage swing
Y _{Output stage directly drives most hybrid or discrete}
CRT amplifier stages
Applications
High resolution CRT monitors
Video switches
Video AGC amplifier
Wideband amplifier with gain and DC offset control
Block and Connection Diagram
Order Number LM1202N or LM1202M
See NS Package Number N20A or M20B
TL H 11440 – 1
C1996 National Semiconductor Corporation TL H 11440
RRD-B30M66 Printed in U S A