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General Description

The MAX9000 family features the combination of a high-

speed operational amplifier, a 185ns comparator, and a

precision 1.230V reference. These devices operate from a

single +2.5V to +5.5V supply and draw less than 500µA of

quiescent current. The MAX9001/MAX9004 feature a shut-

down mode that reduces supply current to 2µA and puts

the outputs into a high-impedance state, making them

ideal for portable and battery-powered applications.

The amplifiers in the MAX9000/MAX9001/MAX9002 are

unity-gain stable with a 1.25MHz gain-bandwidth product,

while the amplifiers in the MAX9003/MAX9004/MAX9005

are stable for closed-loop gains of +10V/V or greater with

an 8MHz gain-bandwidth product. The input common-

mode voltage extends from 150mV below the negative

supply to within 1.2V of the positive supply for the amplifi-

er, and to within 1.1V for the comparator. The amplifier and

to ±2.5mA and ±4.0mA, respectively, to an external load

while maintaining excellent DC accuracy. The unique

design of the comparator output stage substantially

reduces switching current during output transitions, virtually

eliminating power-supply glitches.

The comparator’s ±2mV of built-in hysteresis provides

noise immunity and prevents oscillations even with a

slow-moving input signal. The MAX9000/MAX9001/

MAX9003/MAX9004 have an internal 1.230V ±1% preci-

sion reference with a low 8ppm/°C temperature coeffi-

cient that can sink or source up to 1mA. The amplifier and

reference are stable with capacitive loads up to 250pF

and 100nF, respectively. The comparator’s inverting input

is internally connected to the reference output in the

MAX9000/MAX9003.

________________________Applications

Single-Supply Zero-

Photodiode Preamps

Crossing Detector

Smart Card Readers

Instruments, Terminals,

Infrared Receivers

and Bar-Code Readers

for Remote Controls

Keyless Entry

Sensor Signal Detection

Features

o Op Amp + Comparator + Reference in

Space-Saving µMAX Package

o +2.5V to +5.5V Single-Supply Voltage Range

o 340µA Supply Current (MAX9002/MAX9005)

o Unity-Gain Stable (GBW = 1.25MHz) and

≥ 10V/V, GBW = 8MHz) Options

o Op-Amp/Comparator Outputs Swing Rail-to-Rail

o Ground-Sensing Inputs for Both Op Amp and

Comparator

o Op Amp Stable with Capacitive Loads up to 250pF

o Internal ±2mV Comparator Hysteresis

o Fast 185ns Propagation-Delay Comparator

o No Phase Reversal for Overdriven Inputs

(Both Op Amp and Comparator)

o Internal 1.230V Precision Reference (MAX9000/

MAX9001/MAX9003/MAX9004)

±1% Initial Accuracy

Low 8ppm/°C Temperature Drift

Sink or Source up to 1mA

Stable for Capacitive Loads up to 100nF

Low-Power, High-Speed, Single-Supply

Op Amp + Comparator + Reference ICs

________________________________________________________________

Maxim Integrated Products

1

19-0499; Rev 1; 7/98

PART

MAX9000EUA

MAX9000ESA

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE

PIN-PACKAGE

8 µMAX

8 SO

Ordering Information

Ordering Information continued at end of data sheet.

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

Pin Configurations and Typical Operating Circuit appear at

end of data sheet.

INTERNAL

PRECISION

REFERENCE

PIN-PACKAGE

MAX9000

Yes

8 SO/µMAX

MAX9001

Yes

10 µMAX, 14 SO

PART

MAX9002

No

8 SO/µMAX

OP-AMP GAIN

STABILITY

(V/V)

1

1

1

MAX9003

Yes

8 SO/µMAX

MAX9004

Yes

10 µMAX, 14 SO

MAX9005

No

8 SO/µMAX

10

10

10

SHUTDOWN

No

Yes

No

No

Yes

No

OP-AMP GAIN

BANDWIDTH

(MHz)

1.25

1.25

1.25

8

8

8

______________________________________________________________________________Selector Guide

MAX9001EUB

MAX9001ESD

-40°C to +85°C

-40°C to +85°C

10 µMAX

14 SO