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.

General Description

The MAX4249–MAX4257 low-noise, low-distortion oper-

supply operation down to 2.4V. They draw only 400µA

of quiescent supply current per amplifier while featuring

ultra-low distortion (0.0002% THD), as well as low input

voltage noise density (7.9nV/

√Hz) and low input current

noise density (0.5fA/

√Hz). These features make the

devices an ideal choice for portable/battery-powered

applications that require low distortion and/or low noise.

For additional power conservation, the MAX4249/

MAX4251/MAX4253/MAX4256 offer a low-power shut-

down mode that reduces supply current to 0.5µA and

puts the amplifiers’ outputs into a high-impedance state.

The MAX4249–MAX4257’s outputs swing rail-to-rail and

their input common-mode voltage range includes

ground. The MAX4250–MAX4254 are unity-gain stable;

the MAX4249/MAX4255/MAX4256/MAX4257 are internal-

ly compensated for gains of 10V/V or greater. The single

MAX4250/MAX4255 are available in a space-saving,

5-pin SOT23 package.

Applications

Portable/Battery-Powered Equipment

Medical Instrumentation

ADC Buffers

Digital Scales

Strain Gauges

Sensor Amplifiers

Portable Communications Devices

____________________________Features

o Low Input Voltage Noise Density: 7.9nV/

√Hz

o Low Input Current Noise Density: 0.5fA/

√Hz

o Low Distortion: 0.0002% THD (1k

Ω load)

o 400µA Quiescent Supply Current per Amplifier

o Single-Supply Operation from +2.4V to +5.5V

o Input Common-Mode Voltage Range Includes

Ground

o Outputs Swing within 8mV of Rails with a 10k

Ω Load

o 3MHz GBW Product, Unity-Gain Stable

(MAX4250–MAX4254)

(MAX4249/MAX4255/MAX4256/MAX4257)

o Excellent DC Characteristics:

Large-Signal Voltage Gain = 116dB

o Low-Power Shutdown Mode:

Reduces Supply Current to 0.5µA

Places Outputs in a High-Impedance State

o 400pF Capacitive-Load Handling Capability

o Available in Space-Saving SOT23 and µMAX

Packages

SOT23, Single-Supply, Low-Noise,

Low-Distortion, Rail-to-Rail Op Amps

________________________________________________________________

Maxim Integrated Products

1

19-1295; Rev 2; 4/98

PART

MAX4249ESD

MAX4249EUB

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE

PIN-

PACKAGE

14 SO

10 µMAX

Ordering Information

Selector Guide

Ordering Information continued at end of data sheet.

Pin Configurations and Typical Operating Circuit appear at

end of data sheet.

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

GAIN

BANDWIDTH

(MHz)

MAX4249

22

PART

MINIMUM

STABLE

GAIN (V/V)

10

SHUTDOWN

MODE

PACKAGES

2

Yes

10-pin µMAX, 14-pin SO

NO. OF AMPLIFIERS

PER PACKAGE

MAX4250

3

1

1

—

5-pin SOT23

MAX4251

3

1

1

Yes

8-pin µMAX/SO

MAX4252

3

1

2

—

8-pin µMAX/SO

MAX4253

3

1

2

Yes

10-pin µMAX, 14-pin SO

MAX4254

3

1

4

—

14-pin SO

MAX4255

22

10

1

—

5-pin SOT23

MAX4256

22

10

1

Yes

8-pin µMAX/SO

MAX4257

22

10

2

—

8-pin µMAX/SO

SOT

TOP MARK

—

—

MAX4250EUK-T -40°C to +85°C

5 SOT23-5

ACCI