LM1042

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LM1042 技术参数

February 1995

LM1042 Fluid Level Detector

General Description

Features

Selectable thermal-resistance or linear probe inputs

Control circuitry for thermal-resistive probe

Single-shot or repeating measurements

The LM1042 uses the thermal-resistive probe technique to

measure the level of non-flammable fluids. An output is pro-

vided proportional to fluid level and single shot or repeating

measurements may be made. All supervisory requirements

to control the thermal-resistive probe, including short and

open circuit probe detection, are incorporated within the de-

vice. A second linear input for alternative sensor signals

may also be selected.

Switch on reset and delay to avoid transients

Output amplifier with 10 mA source and sink capability

Short or open probe detection

50V transient protection on supply and control input

7.5V to 18V supply range

Internally regulated supply

40 C to 80 C operation

Block Diagram

TL/H/8709–1

1995 National Semiconductor Corporation

TL/H/8709

RRD-B30M115/Printed in U. S. A.

12 3 4 5 6 7 8

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