MAX4194–MAX4197

Micropower, Single-Supply,

Rail-to-Rail, Precision

Instrumentation Amplifiers

General Description

The MAX4194 is a variable-gain precision instrumenta-

operation, outstanding precision specifications, and a

high gain bandwidth. This amplifier is also offered in

three fixed-gain versions: the MAX4195 (G = +1V/V), the

MAX4196 (G = +10V/V), and the MAX4197 (G =

+100V/V). The fixed-gain instrumentation amplifiers fea-

ture a shutdown function that reduces the quiescent

current to 8µA. A traditional three operational amplifier

configuration is used to achieve maximum DC precision.

The MAX4194–MAX4197 have rail-to-rail outputs and

inputs that can swing to 200mV below the negative rail

and to within 1.1V of the positive rail. All parts draw only

93µA and operate from a single +2.7V to +7.5V supply

or from dual ±1.35V to ±3.75V supplies. These amplifiers

are offered in 8-pin SO packages and are specified for

the extended temperature range (-40°C to +85°C).

See the MAX4198/MAX4199 data sheet for single-supply,

precision differential amplifiers.

Applications

Medical Equipment

Thermocouple Amplifier

4–20mA Loop Transmitters

Data-Acquisition Systems

Battery-Powered/Portable Equipment

Transducer Interface

Bridge Amplifier

Benefits and Features

and Battery-Powered Applications

•

+2.7V Single-Supply Operation

•

Low Power Consumption

93µA Supply Current

8µA Shutdown Current

(MAX4195/MAX4196/MAX4197)

•

High Common-Mode Rejection: 115dB (G = +10V/V)

•

Input Common-Mode Range Extends 200mV Below

GND

•

Low 50µV Input Offset Voltage (G ≥ +100V/V)

•

Low ±0.01% Gain Error (G = +1V/V)

•

250kHz -3dB Bandwidth (G = +1V/V, MAX4194)

•

Rail-to-Rail Outputs

19-1468; Rev 2; 5/15

Pin Configurations

Ordering Information

Selector Guide

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

PART

MAX4194ESA

MAX4195ESA

MAX4196ESA

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

TEMP RANGE

PIN-PACKAGE

8 SO

8 SO

8 SO

MAX4197ESA

-40°C to +85°C

8 SO

PART

MAX4194

MAX4195

MAX4196

Yes

Yes

No

SHUTDOWN

GAIN (V/V)

Variable

+1

+10

MAX4197

Yes

+100

CMRR (dB)

95 (G = +1V/V)

95

115

115

OUT

REF

1

2

8

7

RG+

IN-

IN+

RG-

SO

TOP VIEW

3

4

6

5

MAX4194

OUT

FB

1

2

8

7

SHDN

IN-

IN+

REF

SO

3

4

6

5

MAX4195

MAX4196

MAX4197

•

•