LM1819 Datasheet

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LM1819 Air-Core Meter Driver

February 1995

LM1819 Air-Core Meter Driver

General Description

The LM1819 is a function generator driver for air-core

(moving-magnet) meter movements A Norton amplifier and

an NPN transistor are included on chip for signal condition-

ing as required Driver outputs are self-centering and devel-

op

g

4 5V swing at 20 mA Better than 2% linearity is guar-

anteed over a full 305-degree operating range

Features

Y

Y

Y

Y

Self-centering 20 mA outputs

12V operation

Norton amplifier

Function generator

Applications

Y

Y

Y

Air-core meter driver

Tachometers

Ruggedized instruments

Typical Application

TL H 5263 鈥?1

FIGURE 1 Automotive Tachometer Application Circuit shown operates

with 4 cylinder engine and deflects meter pointer (270 ) at 6000 RPM

Order Number LM1819M or LM1819N

See NS Package Number M14A or N14A

TRW Type X463UW Polycarbonate Capacitor

RN60D Low TC Resistor (

g

100 ppm)

Components Required for Automotive Load Dump Protection

Available from FARIA Co

P O Box 983 Uncasville CT 06382

Tel 203-848-9271

C

1995 National Semiconductor Corporation

TL H 5263

RRD-B30M115 Printed in U S A

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