LM1209 datasheet(1/24 Pages) NSC

No de pièce	LM1209

Description	130 MHz/100 MHz RGB Video Amplifier System with Blanking

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Fabricant	NSC [National Semiconductor (TI)]

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TLH11884

January 1996

LM1208LM1209

130 MHz100 MHz RGB Video Amplifier System

with Blanking

General Description

The LM1208LM1209 is a very high frequency video amplifi-

er system intended for use in high resolution RGB monitor

applications In addition to the three matched video amplifi-

ers the LM1208LM1209 contains three gated single end-

ed input black level clamp comparators for brightness con-

trol three matched DC controlled attenuators for contrast

control and three DC controlled drive attenuators providing

independent full range gain control in each channel for wide

range white balance All DC control inputs offer high input

impedance and an operation range from 0V to 4V for easy

interface

to

bus

controlled

alignment

systems

The

LM1208LM1209 also contains a blanking circuit which

clamps the video output voltage during blanking to within

01V above ground This feature provides blanking capabili-

ty at the cathodes of the CRT A spot killer is provided for

CRT phosphor protection during power-down

Features

Y

Three wideband video amplifiers 130 MHz

b

3dB

(4 VPP output)

Y

Matched (g01 dB or 12%) attenuators for contrast

control

Y

Three externally gated single ended input comparators

for cutoff and brightness control

Y

0V to 4V high input impedance DC contrast control

(l40 dB range)

Y

0V to 4V high input impedance DC full range gain con-

trol (Drive) for each video channel (l40 dB range)

Y

Spot killer blanks outputs when VCC k 106V

Y

Capable of 7 VPP output swing (slight reduction in

bandwidth)

Y

Output stage blanking

Y

Output stage directly drives most hybrid or discrete

CRT drivers

Applications

Y

High resolution RGB CRT monitors

Y

Video AGC amplifiers

Y

Wideband amplifiers with gain and DC offset controls

Y

Interface amplifiers for LCD or CCD systems

Block and Connection Diagram

TLH11884 1

FIGURE 1

Order Number LM1208N or LM1209N

See NS Package Number N28B

C1996 National Semiconductor Corporation

RRD B30M66Printed in U S A

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