FEATURES

q VERY LOW NOISE: 4.5nV/

q FAST SETTLING TIME:

OPA627—550ns to 0.01%

OPA637—450ns to 0.01%

q LOW V

q LOW DRIFT: 0.8

q LOW I

q OPA627: Unity-Gain Stable

q OPA637: Stable in Gain

OPA627

OPA637

DESCRIPTION

The OPA627 and OPA637 Difet operational amplifi-

ers provide a new level of performance in a precision

FET op amp. When compared to the popular OPA111

op amp, the OPA627/637 has lower noise, lower offset

voltage, and much higher speed. It is useful in a broad

range of precision and high speed analog circuitry.

The OPA627/637 is fabricated on a high-speed, dielec-

trically-isolated complementary NPN/PNP process. It

operates over a wide range of power supply voltage—

±4.5V to ±18V. Laser-trimmed Difet input circuitry

provides high accuracy and low-noise performance

comparable with the best bipolar-input op amps.

High frequency complementary transistors allow in-

creased circuit bandwidth, attaining dynamic perform-

ance not possible with previous precision FET op

amps. The OPA627 is unity-gain stable. The OPA637

is stable in gains equal to or greater than five.

Difet fabrication achieves extremely low input bias

currents without compromising input voltage noise

performance. Low input bias current is maintained

over a wide input common-mode voltage range with

unique cascode circuitry.

The OPA627/637 is available in plastic DIP, SOIC

and metal TO-99 packages. Industrial and military

temperature range models are available.

®

Precision High-Speed

APPLICATIONS

q PRECISION INSTRUMENTATION

q FAST DATA ACQUISITION

q DAC OUTPUT AMPLIFIER

q OPTOELECTRONICS

q SONAR, ULTRASOUND

q HIGH-IMPEDANCE SENSOR AMPS

q HIGH-PERFORMANCE AUDIO CIRCUITRY

q ACTIVE FILTERS

Trim

5

Trim

1

+In

3

–In

2

Output

6

7

+V

S

–V

S

4

©1989 Burr-Brown Corporation

PDS-998H

Printed in U.S.A. March, 1998

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111

Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

OPA627

OPA627

SBOS165