Dual 9 MHz Precision

Operational Amplifier

Data Sheet

OP285

Rev. C

Document Feedback

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother

rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.

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

Tel: 781.329.4700

©1992–2018 Analog Devices, Inc. All rights reserved.

Technical Support

www.analog.com

FEATURES

Low offset voltage: 250 μV

Low noise: 6 nV/√Hz

Low distortion: 0.0006%

High slew rate: 22 V/μs

Wide bandwidth: 9 MHz

Low supply current: 5 mA

Low offset current: 2 nA

Unity-gain stable

8-lead SOIC_N package

APPLICATIONS

High performance audio

Active filters

Fast amplifiers

Integrators

PIN CONNECTION

OUT A 1

–IN A 2

+IN A 3

V– 4

V+

8

OUT B

7

–IN B

6

+IN B

5

OP285

(Not to Scale)

8-Lead Narrow Body SOIC

GENERAL DESCRIPTION

The OP285 is a precision high-speed amplifier featuring the

Butler Amplifier front-end. This new front-end design

combines the accuracy and low noise performance of bipolar

transistors with the speed of JFETs. This yields an amplifier

with high slew rates, low offset and good noise performance at

low supply currents. Bias currents are also low compared to

bipolar designs.

The OP285 offers the slew rate and low power of a JFET

amplifier combined with the precision, low noise and low drift

of a bipolar amplifier. Input offset voltage is laser-trimmed and

guaranteed less than 250 μV. This makes the OP285 useful in

dc-coupled or summing applications without the need for

special selections or the added noise of additional offset

adjustment circuitry. Slew rates of 22 V/μs and a bandwidth of

9 MHz make the OP285 one of the most accurate medium

speed amplifiers available.

The combination of low noise, speed and accuracy can be used

to build high speed instrumentation systems. Circuits such as

instrumentation amplifiers, ramp generators, bi-quad filters and

dc-coupled audio systems are all practical with the OP285. For

applications that require long term stability, the OP285 has a

guaranteed maximum long term drift specification.

The OP285 is specified over the XIND—extended industrial—

(−40°C to +85°C) temperature range. The OP285 is available in

an 8-lead SOIC_N surface mount package.