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General Description

The MAX4074–MAX4078 GainAmp™ op amp family

internal gain-setting resistors. Factory-trimmed on-chip

resistors decrease design size, cost, and layout, and

provide 0.1% gain accuracy. Fixed inverting gains from

-0.25V/V to -100V/V or noninverting gains from +1.25V/V

to +101V/V are available. These devices operate from a

single +2.5V to +5.5V supply and consume just 34µA.

GainAmp amplifiers are optimally compensated for each

gain version, achieving gain bandwidth (GBW) products

fault protection withstands ±17V at either input without

damage or excessive current draw (MAX4074/MAX4075

only).

Two versions are available in this amplifier family. The

MAX4076/MAX4077/MAX4078 are single/dual/quad

open-loop, unity-gain-stable op amps, and the

MAX4074/MAX4075 are single/dual fixed-gain op

amps. The input common-mode voltage range of the

open-loop amplifiers extends from 150mV below the

negative supply to within 1.2V of the positive supply.

The GainAmp outputs can swing rail-to-rail and drive a

1k

Ω load while maintaining excellent DC accuracy

(MAX4074/MAX4075 only). The amplifiers are stable for

capacitive loads up to 100pF.

For space-critical applications, the MAX4074/MAX4076

are available in space-saving SOT23-5 packages.

Applications

Portable Battery-Powered Equipment

Instruments, Terminals, and Bar-Code Readers

Keyless Entry

Photodiode Preamps

Smart-Card Readers

Infrared Receivers for Remote Controls

Low-Side Current-Sense Amplifiers

Features

o Internal Gain-Setting Resistors in SOT23

Packages (MAX4074)

o 54 Standard Gains Available (MAX4074/75)

o Open-Loop, Unity-Gain-Stable Op Amps

(MAX4076/77/78)

o Rail-to-Rail Outputs Drive 1kΩ Load (MAX4074/75)

o +2.5V to +5.5V Single Supply

o 34µA Supply Current (MAX4074/75)

o Up to 4MHz GBW Product

o Fault-Protected Inputs Withstand ±17V

(MAX4074/75)

o 200pA max Input Bias Current (MAX4076/77/78)

o Stable with Capacitive Loads up to 100pF

with No Isolation Resistor

Micropower, SOT23, Rail-to-Rail,

Fixed-Gain, GainAmp/Open-Loop Op Amps

________________________________________________________________ Maxim Integrated Products

1

TOP VIEW

MAX4074

5

4

1

2

3

IN-

OUT

IN+

SOT23-5

19-1526; Rev 1; 10/99

Pin Configurations/

Functional Diagrams

GainAmp is a trademark of Maxim Integrated Products.

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

Ordering Information

Pin Configurations continued at end of data sheet.

Ordering Information continued at end of data sheet.

Note: Insert the desired gain code in the blank to complete the

part number (see the Gain Selector Guide).

**See the Gain Selector Guide for a list of preferred gains and

top marks.

8 SO

5 SOT23-5

PIN-

PACKAGE

TEMP. RANGE

-40°C to +70°C

-40°C to +70°C

MAX4074__ESA

MAX4074__EUK-T

PART

—

**

TOP

MARK

Typical Operating Circuit appears at end of data sheet.

Gain Selector Guide appears at end of data sheet.