Datasheet > LM1262

LM1262

更新时间： 2024-09-22 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
20页	1125K
描述
200 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs

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LM1262 数据手册

March 2002

LM1262

200 MHz I²C Compatible RGB Video Amplifier System

with OSD and DACs

n 4 external 8-bit DACs for bus controlled Bias and

Brightness

General Description

The LM1262 pre-amp is an integrated CMOS CRT pre-amp.

n Vertical blank from sandcastle or input at pin 13 OR’ed

The IC is I²C compatible, and allows control of all the pa-

with horz. blank signal, option selected by I²C

rameters necessary to directly setup and adjust the gain and

n Contrast and brightness updates synchronous with

contrast in the CRT display. Brightness and bias can be

vertical blank, enabled by I²C

controlled through the DAC outputs, and is well matched to

the LM2479 and LM2480 integrated bias clamp IC.

n Video set to black level through I²C

n Suitable for use with discrete or integrated clamp, with

The LM1262 pre-amp is designed to work in cooperation

software configurable Brightness mixer

with the LM246X high gain driver family.

n Power Save (Green) Mode, 80% power reduction

n Matched to 11-lead LM246X driver

Black level clamping of the signal is carried out directly on

the AC coupled input signal into the high impedance pream-

plifier input, thus eliminating the need for additional black

level clamp capacitors.

Applications

n High end 19” and 21” bus controlled monitors with OSD

n 1600 X 1200, 85 Hz or higher applications

n Low cost and high performance system with LM246X

driver

The IC is packaged in an industry standard 24-lead DIP

molded plastic package.

Features

n I²C compatible interface

Block and Connection Diagram

DS200404-1

FIGURE 1. Order Number LM1262NA

See NS Package Number N24D

DS200404

www.national.com

12 3 4 5 6 7...20

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