LP339

Ultra-Low Power Quad Comparator

General Description

The LP339 consists of four independent voltage compara-

tors designed specifically to operate from a single power

supply and draw typically 60 µA of power supply drain cur-

rent over a wide range of power supply voltages. Operation

from split supplies is also possible and the ultra-low power

supply drain current is independent of the power supply volt-

age. These comparators also feature a common-mode

range which includes ground, even when operated from a

single supply.

Applications

include

limit

comparators,

simple

analog-to-digital converters, pulse, square and time delay

generators; VCO’s; multivibrators; high voltage logic gates.

The LP339 was specifically designed to interface with the

CMOS logic family. The ultra-low supply current makes the

LP339 valuable in battery powered applications.

Advantages

n

Ultra-low power supply drain suitable for battery

applications

n

Single supply operation

n

Sensing at ground

n

Compatible with CMOS logic family

n

Pin-out identical to LM339

Features

n

Ultra-low power supply current drain

(60 µA) — independent of the supply voltage

(75 µW/comparator at +5 V

DC)

n

Low input biasing current:

3 nA

n

Low input offset current:

±0.5 nA

n

Low input offset voltage:

±2mV

n

Input common-mode voltage includes ground

n

Output voltage compatible with MOS and CMOS logic

n

High output sink current capability (30 mA at V

O=2 VDC)

n

Supply Input protected against reverse voltages

Schematic and Connection Diagrams

Typical Applications (V+= 5.0 V

DC)

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Order Number LP339M for S.O. Package

See NS Package Number M14A

Order Number LP339N for Dual-In-Line Package

See NS Package Number N14A

Basic Comparator

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Driving CMOS

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August 2000

© 2000 National Semiconductor Corporation

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