REV. A

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a

OP90

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2002

Precision Low-Voltage Micropower

Operational Amplifier

PIN CONNECTIONS

8-Lead Hermetic DIP

(Z-Suffix)

8-Lead Epoxy Mini-DIP

(P-Suffix)

8-Lead SO

(S-Suffix)

8

7

6

5

1

2

3

4

NC = NO CONNECT

–IN

+IN

NC

V+

OUT

V–

FEATURES

Single/Dual Supply Operation: 1.6 V to 36 V,

0.8 V to

18 V

True Single-Supply Operation; Input and Output

Voltage Ranges Include Ground

Low Supply Current: 20

A Max

High Output Drive: 5 mA Min

Low Input Offset Voltage: 150

V Max

High Open-Loop Gain: 700 V/mV Min

Outstanding PSRR: 5.6

V/V Max

Standard 741 Pinout with Nulling to V–

GENERAL DESCRIPTION

The OP90 is a high performance, micropower op amp that

operates from a single supply of 1.6 V to 36 V or from dual

supplies of

±0.8 V to ±18 V. The input voltage range includes

the negative rail allowing the OP90 to accommodate input

signals down to ground in a single-supply operation. The OP90’s

output swing also includes a ground when operating from a

single-supply, enabling “zero-in, zero-out” operation.

The OP90 draws less than 20

µA of quiescent supply current,

while able to deliver over 5 mA of output current to a load. The

input offset voltage is below 150

µV eliminating the need for

*ELECTRONICALLY ADJUSTED ON CHIP

FOR MINIMUM OFFSET VOLTAGE

NULL

NULL

–IN

+IN

V+

OUTPUT

V–

**

Figure 1. Simplied Schematic

external nulling. Gain exceeds 700,000 and common-mode

rejection is better than 100 dB. The power supply rejection

ratio of under 5.6

µV/V minimizes offset voltage changes experi-

enced in battery-powered systems.

The low offset voltage and high gain offered by the OP90 bring

precision performance to micropower applications. The minimal

voltage and current requirements of the OP90 suit it for battery

and solar powered applications, such as portable instruments,

remote sensors, and satellites.