Datasheet > LM1205

LM1205

更新时间： 2024-09-15 22:51:59

品牌	Logo	应用领域
美国国家半导体 - NSC		视频放大器
页数	文件大小	规格书
24页	436K
描述
130 MHz/85 MHz RGB Video Amplifier System with Blanking

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LM1205 数据手册

January 1996

LM1205/LM1207

130 MHz/85 MHz RGB Video Amplifier System with

Blanking

Three externally gated single ended input comparators

for cutoff and brightness control

General Description

The LM1205/LM1207 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 LM1205/LM1207 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 sub-contrast attenuators

providing gain trim capability for white balance. All DC con-

trol inputs offer high input impedance and an operation

range from 0V to 4V for easy interface to bus controlled

alignment systems. The LM1205/LM1207 also contains a

blanking circuit which clamps the video output voltage dur-

ing blanking to within 0.1V above ground. This feature pro-

vides blanking capability at the cathodes of the CRT. A spot

killer is provided for CRT phosphor protection during power-

down.

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

(

40 dB range)

0V to 4V, high input impedance DC drive control for

each video amplifier ( 6 dB to 0 dB range)

Spot killer, blanks output when V

10.6V

Capable of

bandwidth)

7 V

output swing (slight reduction in

Output stage blanking

Output stage directly drives most hybrid or discrete

CRT drivers

Applications

High resolution RGB CRT monitors

Video AGC amplifiers

Wideband amplifiers with gain and DC offset controls

Features

Interface amplifiers for LCD or CCD systems

Three wideband video amplifiers 130 MHz (LM1205)

Matched ( 0.1 dB or 1.2%) attenuators for contrast

3 dB (4 V output)

control

Block and Connection Diagram

TL/H/11881–1

FIGURE 1

Order Number LM1205N or LM1207N

See NS Package Number N28B

1996 National Semiconductor Corporation

TL/H/11881

RRD-B30M66/Printed in U. S. A.

12 3 4 5 6 7...24

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