LM1203B 100 MHz RGB Video Amplifier System
January 1996
LM1203B
100 MHz RGB Video Amplifier System
General Description
The LM1203B is an improved version of the popular
LM1203 wideband video amplifier system The device is in-
tended for high resolution RGB CRT monitors In addition to
three matched video amplifiers the LM1203B 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 鈥樷€楧rive鈥欌€?node for setting maximum system gain or provid-
ing gain trim capability for white balance The LM1203B also
contains a voltage reference for the video inputs The
LM1203B is pin and function compatible with the LM1203
Features
Y
Y
Y
Y
Y
Y
Y
b
3 dB)
Three wideband video amplifiers (100 MHz
Matched (
g
0 1 dB or 1 2%) attenuators for
contrast control
Three externally gated comparators for
brightness control
Provisions for individual gain control (Drive) of each
video amplifier
Video input voltage reference
Low impedance output driver
Stable on a single sided board
Applications
Y
Y
Y
Improvements over LM1203
Y
Y
Y
Y
High resolution RGB CRT monitors
Video AGC amplifiers
Wideband amplifiers with gain and DC offset controls
100 MHz vs 70 MHz bandwidth
V
OUT
low
t
r
t
f
Built in power down spot killer
0 15V vs 0 9V
3 7 ns vs 5 ns
Block and Connection Diagrams
28-Lead Molded DIP
TL H 11489 鈥?1
Order Number LM1203BN
See NS Package Number N28B
C
1996 National Semiconductor Corporation
TL H 11489
RRD-B30M66 Printed in U S A