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General Description

The MAX4174/MAX4175/MAX4274/MAX4275 Gain-

biasing. 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 only 300µA.

GainAmp amplifiers are optimally compensated for

each gain version, achieving exceptional GBW prod-

age fault protection withstands ±17V at either input

without excessive current draw.

Three versions are available in this amplifier family: single/

dual/quad open-loop, unity-gain stable (MAX4281/

MAX4282/MAX4284); single/dual fixed gain (MAX4174/

MAX4274); and single/dual fixed gain plus internal

MAX4275), which simplifies input biasing in single-supply

designs. 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 outputs can swing rail-to-rail and drive a 1k

Ω load

while maintaining excellent DC accuracy. The amplifier

is stable for capacitive loads up to 470pF.

Applications

Portable Instruments

Smart-Card Readers

Instruments, Terminals,

Infrared Receivers for

and Bar-Code Readers

Remote Controls

Keyless Entry

Low-Side Current-Sense

Photodiode Preamps

Amplifiers

Features

o GainAmp Family Provides Internal Precision

Gain-Setting Resistors in SOT23 (MAX4174/5)

MAX4274/5)

o 54 Standard Gains Available (MAX4174/5,

MAX4274/5)

o Open-Loop Unity-Gain-Stable Op Amps

(MAX4281/2/4)

o Rail-to-Rail Outputs Drive 1k

Ω Load

o +2.5V to +5.5V Single Supply

o 300µA Supply Current

o Up to 23MHz GBW Product

o Fault-Protected Inputs Withstand ±17V

o Stable with Capacitive Loads Up to 470pF with

No Isolation Resistor

SOT23, Rail-to-Rail, Fixed-Gain

GainAmps/Open-Loop Op Amps

________________________________________________________________

Maxim Integrated Products

1

19-1407; Rev 3; 8/99

PART*

MAX4174_EUK-T

-40°C to +85°C

TEMP. RANGE

PIN-

PACKAGE

5 SOT23-5

Ordering Information continued at end of data sheet.

*

Insert the desired gain code (from the Gain Selection Guide)

in the blank to complete the part number.

and SOT Top Marks.

Ordering Information

GainAmp is a trademark of Maxim Integrated Products. Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

Pin Configurations

Typical Operating Circuit

MAX4175

INPUT

IN-

IN+

+5V

OUT

0.1

µF

0.1

µF

0.1

µF

TOP VIEW

MAX4174

5

4

1

2

3

IN-

OUT

IN+

+

SOT23-5

Selector Guide appears at end of data sheet.

Pin Configurations continued at end of data sheet.

TOP

MARK

††

MAX4175_EUK-T

††

-40°C to +85°C

5 SOT23-5