LM1281

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
14页	395K
描述
85 MHz RGB Video Amplifier System with On Screen Display (OSD)

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数据手册

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LM1281 数据手册

April 1999

LM1281

85 MHz RGB Video Amplifier System with On Screen

Display (OSD)

n TTL OSD inputs, 50 MHz bandwidth

n On chip blanking, outputs under 0.1 V when blanked

n High speed Video/OSD switch

n Independent drive control for each channel for color

General Description

The LM1281 is a full feature video amplifier with OSD inputs,

all within a 28-pin package. This part is intended for use in

monitors with resolutions up to 1024 x 768. The video sec-

tion of the LM1281 features three matched video amplifiers

with blanking. All of the video amplifier adjustments feature

balance

n 0V to 4V, high impedance DC contrast control with over

40 dB range

high input impedance 0V to 4V DC controls, providing easy

n 0V to 4V, high impedance DC drive control (0 dB to

−12 dB range)

n 0V to 4V, high impedance DC OSD contrast control with

over 40 dB range

n Capable of 7 V_PPoutput swing (slight reduction in

bandwidth)

n Output stage directly drives most hybrid or discrete CRT

drivers

interfacing to bus controlled alignment systems. The OSD

section features three TTL inputs and a DC contrast control.

The switching between the OSD and video section is con-

trolled by a single TTL input. Although the OSD signals are

TTL inputs, these signals are internally processed to match

the OSD logic low level to the video black level. When ad-

justing the drive controls for color balance of the video sig-

nal, the color balance of the OSD display will track these

color adjustments. The LM1281 also features an internal

spot killer circuit to protect the CRT when the monitor is

turned off. For applications without OSD insertion please re-

fer to the LM1205 or LM1208 data sheets.

Applications

n High resolution RGB CRT monitors requiring OSD

capability

Features

n Three wideband video amplifiers 85 MHz −3 dB

(4 V_PPoutput)

Block and Connection Diagram

DS012355-1

FIGURE 1. Order Number LM1281N

See NS Package Number N28B

DS012355

www.national.com

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与LM1281相关器件

型号	品牌	获取价格	描述	数据表
LM1281N	NSC	获取价格	85 MHz RGB Video Amplifier System with On Screen Display (OSD)
LM1282	NSC	获取价格	110 MHz RGB Video Amplifier System with On Screen Display (OSD)
LM1282N	NSC	获取价格	110 MHz RGB Video Amplifier System with On Screen Display (OSD)
LM1283	NSC	获取价格	140 MHz RGB Video Amplifier System with On Screen Display (OSD)
LM1283N	NSC	获取价格	140 MHz RGB Video Amplifier System with On Screen Display (OSD)
LM129	NSC	获取价格	Precision Reference
LM129	Linear	获取价格	6.9V Precision Voltage Reference
LM129_1	Linear	获取价格	6.9V Precision Voltage Reference
LM1290	NSC	获取价格	Autosync Horizontal Deflection Processor
LM1290N	NSC	获取价格	Autosync Horizontal Deflection Processor