_______________General Description

The dual MAX492, quad MAX494, and single MAX495

operational amplifiers combine excellent DC accuracy

with rail-to-rail operation at the input and output. Since

the devices can operate from either a single supply

(+2.7V to +6V) or split supplies (±1.35V to ±3V). Each

op amp requires less than 150µA supply current. Even

with this low current, the op amps are capable of driving

a 1k

Ω load, and the input referred voltage noise is only

25nV/

√Hz. In addition, these op amps can drive loads in

excess of 1nF.

The precision performance of the MAX492/MAX494/

MAX495, combined with their wide input and output

dynamic range, low-voltage single-supply operation, and

very low supply current, makes them an ideal choice for

battery-operated equipment and other low-voltage appli-

cations. The MAX492/MAX494/MAX495 are available in

DIP and SO packages in the industry-standard op-amp

pin configurations. The MAX495 is also available in the

smallest 8-pin SO: the µMAX package.

________________________Applications

Portable Equipment

Battery-Powered Instruments

Data Acquisition

Signal Conditioning

Low-Voltage Applications

____________________________Features

o Low-Voltage Single-Supply Operation (+2.7V to +6V)

o Rail-to-Rail Input Common-Mode Voltage Range

o Rail-to-Rail Output Swing

o 500kHz Gain-Bandwidth Product

o Unity-Gain Stable

o 150µA Max Quiescent Current per Op Amp

o No Phase Reversal for Overdriven Inputs

o 200µV Offset Voltage

o High Voltage Gain (108dB)

o High CMRR (90dB) and PSRR (110dB)

o Drives 1k

Ω Load

o Drives Large Capacitive Loads

o MAX495 Available in µMAX Package—8-Pin SO

______________Ordering Information

Ordering Information continued at end of data sheet.

*

Single/Dual/Quad, Micropower,

Single-Supply Rail-to-Rail Op Amps

________________________________________________________________

Maxim Integrated Products

1

1

2

3

4

8

7

6

5

OUT2

IN2-

IN2+

IN1+

IN1-

OUT1

MAX492

DIP/SO

TOP VIEW

1

2

3

4

8

7

6

5

N.C.

OUT

NULL

IN1+

IN1-

NULL

MAX495

DIP/SO/

µMAX

_________________Pin Configurations

MAX187

(ADC)

GND

INPUT SIGNAL CONDITIONING FOR LOW-VOLTAGE ADC

SERIAL

INTERFACE

6

8

7

3

1

4.096V

4

AIN

5

DOUT

SCLK

CS

SHDN

REF

2

ANALOG

INPUT

+5V

6

7

4

2

3

10k

10k

MAX495

__________Typical Operating Circuit

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

19-0265; Rev 2; 9/96

PART

MAX492CPA

MAX492CSA

MAX492C/D

0°C to +70°C

0°C to +70°C

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

8 Plastic DIP

8 SO

Dice*

MAX492EPA

MAX492ESA

-40°C to +85°C

-40°C to +85°C

8 Plastic DIP

8 SO

MAX492MJA

-55°C to +125°C

8 CERDIP

Pin Configurations continued at end of data sheet.