Dual Low Power 1.5% Comparator

With 400 mV Reference

ADCMP670

Rev. A

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FEATURES

400 mV ± 1.5% threshold

Supply range: 1.7 V to 5.5 V

Low quiescent current: 6.5 μA typical

Input range includes ground

Internal hysteresis: 8.9 mV typical

Low input bias current: ±10 nA maximum

Open-drain outputs

Supports wire-AND connections

Input polarities: one inverting and one noninverting

Low profile (1 mm) TSOT package

Drop-in replacement for the LT6700-1

APPLICATIONS

Li-Ion monitoring

Portable applications

Hand-held instruments

Window comparators

LED/relay driving

Optoisolator driving

Control systems

FUNCTIONAL BLOCK DIAGRAM

+INA

OUTA

OUTB

–INB

GND

400mV

ADCMP670-1

386

TEMPERATURE (°C)

–40

–20

0

20

40

60

80

100

120

404

402

400

398

396

394

392

390

388

Figure 1.

GENERAL DESCRIPTION

The ADCMP670 consists of two low power, high accuracy,

comparator and reference circuits in a 6-lead TSOT package.

The internal 400 mV reference provides the ability to monitor

low voltage supplies. The device operates on a supply voltage

from 1.7 V to 5.5 V and draws only 6.5 μA typical, making it

suitable for low power system monitoring and portable applica-

tions. Hysteresis is included in the comparators. The comparator

outputs are open-drain and the output can be pulled up to any

voltage up to 5.5 V. The output stage is guaranteed to sink

greater than 5 mA over temperature.

The ADCMP670 is currently available in one model, the

ADCMP670-1. This model has one inverting input and one

noninverting input, making it suitable for use as a window

comparator. The device is suitable for portable, commercial,

industrial, and automotive applications.

2A

1A

1B

2B

RISING INPUT

FALLING INPUT

TWO TYPICAL PARTS

COMP A AND COMP B

Figure 2. Comparator Thresholds vs. Temperature