_______________General Description

The MAX951–MAX954 feature combinations of a

micropower operational amplifier, comparator, and ref-

erence 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 with-

in 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

compensated 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 characteristics over their entire operat-

ing temperature range, minimizing input referred errors.

The comparator output stage of these devices continu-

ously sources as much as 40mA. The comparators

eliminate power-supply glitches that commonly occur

when changing logic states, minimizing parasitic feed-

back and making the devices easier to use. In addition,

they contain ±3mV internal hysteresis to ensure clean

output switching, even with slow-moving input signals.

____________________________Features

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

µMAX Package (MAX951/MAX952)

o 7µA Typical Supply Current

(Op Amp + Comparator + Reference)

o Comparator and Op-Amp Input Range Includes

Ground

o Outputs Swing Rail to Rail

o +2.4V to +7V Supply Voltage Range

o Unity-Gain Stable and 125kHz Decompensated

≥ 10V/V Op-Amp Options

o Internal 1.2V ±2% Bandgap Reference

o Internal Comparator Hysteresis

o Op Amp Capable of Driving up to 1000pF Load

________________________Applications

Instruments, Terminals, and Bar-Code Readers

Battery-Powered Systems

Automotive Keyless Entry

Low-Frequency, Local-Area Alarms/Detectors

Photodiode Preamps

Smart Cards

Infrared Receivers for Remote Controls

Smoke Detectors and Safety Sensors

Ultra-Low-Power, Single-Supply

Op Amp + Comparator + Reference

________________________________________________________________

Maxim Integrated Products

1

TOP VIEW

( ) ARE FOR MAX953/MAX954

1

2

3

4

8

7

6

5

COMPOUT

REF (COMPIN-)

COMPIN+

AMPIN+

AMPIN-

AMPOUT

MAX951

MAX952

MAX953

MAX954

DIP/SO/µMAX

__________________Pin Configuration

19-0431; Rev 1; 7/97

Typical Operating Circuit and Ordering Information

appear at end of data sheet.

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

____________________Selection Table

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.