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MAX951

Ultra-Low-Power, Single-Supply Op Amp + Comparator + Reference

Maxim Integrated 

MAX951–MAX954

Ultra-Low-Power, Single-Supply

Op Amp + Comparator + Reference

General Description

The MAX951–MAX954 feature combinations of a micro-

power operational amplifier, comparator, and reference

in an 8-pin package. In the MAX951 and MAX952, the

comparator’s inverting input is connected to an internal

1.2V ±2% bandgap reference. The MAX953 and MAX954

are offered without an internal reference. The MAX951/

MAX952 operate from a single 2.7V to 7V supply with a

typical supply current of 7μA, while the MAX953/MAX954

operate from 2.4V to 7V with a 5μA typical supply current.

Both the op amp and comparator feature a common-

mode input voltage range that extends from the negative

supply rail to within 1.6V of the positive rail, as well as

output stages that swing Rail-to-Rail®.

The op amps in the MAX951/MAX953 are internally com-

pensated to be unity-gain stable, while the op amps in the

MAX952/MAX954 feature 125kHz typical bandwidth, 66V/

ms slew rate, and stability for gains of 10V/V or greater.

These op amps have a unique output stage that enables

them to operate with an ultra-low supply current while

maintaining linearity under loaded conditions. In addition,

they have been designed to exhibit good DC character-

istics over their entire operating temperature range, mini-

mizing input-referred errors.

The comparator output stage of these devices continu-

ously sources as much as 40mA. The comparators elimi-

nate power-supply glitches that commonly occur when

changing logic states, minimizing parasitic feedback and

making the devices easier to use. In addition, they contain

±3mV internal hysteresis to ensure clean output switch-

ing, even with slow-moving input signals.

Applications

●● Instruments, Terminals, and Bar-Code Readers

●● Battery-Powered Systems

●● Low-Frequency, Local-Area Alarms/Detectors

●● Photodiode Preamps

●● Smart Cards

●● Infrared Receivers for Remote Controls

●● Smoke Detectors and Safety Sensors

Features

●● Op Amp + Comparator + Reference in an 8-Pin

μMAX Package (MAX951/MAX952)

●● 7μA Typical Supply Current (Op Amp + Comparator +

Reference)

●● Comparator and Op Amp Input Range Includes

Ground

●● Outputs Swing Rail to Rail

●● 2.4V to 7V Supply Voltage Range

●● Unity-Gain Stable and 125kHz Decompensated

AV ≥ 10V/V Op Amp Options

●● Internal 1.2V ±2% Bandgap Reference

●● Internal Comparator Hysteresis

●● Op Amp Capable of Driving up to 1000pF Load

Selector Guide

PART

INTERNAL

2%

PRECISION

REFERENCE

OP AMP

GAIN

STABILITY

(V/V)

COMPARATOR

SUPPLY

CURRENT

(µA)

MAX951

Yes

1

Yes

7

MAX952

Yes

10

Yes

7

MAX953

No

1

Yes

5

MAX954

No

10

Yes

5

Pin Configuration

TOP VIEW

AMPOUT 1

AMPIN- 2

AMPIN+ 3

VSS 4

MAX951

MAX952

MAX953

MAX954

8 VDD

7 COMPOUT

6 REF (COMPIN-)

5 COMPIN+

DIP/SO/µAX

( ) ARE FOR MAX953/MAX954

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

Typical Operating Circuit and Ordering Information appear

at end of data sheet end of data sheet.

19-0431; Rev 3; 2/15

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