Single 0.275% Comparator and Reference

with Dual Polarity Outputs

ADCMP361

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other

rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

Fax: 781.461.3113

©2007 Analog Devices, Inc. All rights reserved.

FEATURES

400 mV ± 0.275% threshold

Supply range: 1.7 V to 5.5 V

Low quiescent current: 6.5 μA typical

Input range includes ground

Internal hysteresis: 9.3 mV typical

Low input bias current: ±5 nA maximum

Dual open-drain outputs

Small SOT-23 package

APPLICATIONS

Li-Ion monitoring

Threshold detectors

Relay driving

Optoisolator driving

Industrial control systems

Handheld instruments

FUNCTIONAL BLOCK DIAGRAM

IN

OUT

OUT

GND

400mV

ADCMP361

Figure 1.

GENERAL DESCRIPTION

The ADCMP361 is a single low power, high accuracy compara-

tor with a 400 mV reference in a 5-lead SOT-23 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 only draws 6.5 μA typical, making it suitable

for low power system monitoring and portable applications.

Hysteresis is included in the comparators.

There are dual open-drain outputs to enable the comparator

and reference circuit to be used in an inverting or noninverting

configuration. The outputs can be pulled to any voltage up to a

maximum of 5.5 V. The output stage is guaranteed to sink greater

than 5 mA over temperature

The device is suitable for portable, commercial, industrial, and

automotive applications.

IN

OUT

ADCMP361

GND

OUT

R1

4.7MΩ

R2

1MΩ

R3

1MΩ

+

+

–

3V

Li-Ion

CELL

C1

100nF

400mV

Figure 2. Typical Li-Ion Monitoring Application

2.280V

2.271V

CHARGING

DISCHARGING

Figure 3. Li-Ion Monitoring Waveforms