®

OPA678

1

+

–

A

A/B Channel

Select Input

(TTL or ECL)

B

Input A

Input B

Output

Compensation

Enable

A

Enable

B

+

–

Wideband Switched-Input

OPERATIONAL AMPLIFIER

OPA678

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

®

FEATURES

q FAST SETTLING: 11ns (1%)

q WIDE BANDWIDTH: 200MHz

q TWO LOGIC SELECTABLE INPUTS

q LOW OFFSET VOLTAGE:

q FAST INPUT SWITCHING: 4ns

q ACCEPTS TTL/ECL SWITCHING SIGNALS

q UNITY GAIN STABLE

q 16-PIN DIP AND SO-16 PACKAGES

APPLICATIONS

q VIDEO AMPLIFICATION AND SWITCHING

q FAST 2-INPUT MULTIPLEXER

q PULSE/RF AMPLIFIERS

q PROGRAMMABLE-GAIN AMPLIFIER

q ACTIVE FILTERS

q SYNCHRONOUS DEMODULATOR

q LOW COST REPLACEMENT FOR OPA675/676

DESCRIPTION

The OPA678 is a wideband monolithic operational

amplifier with two

independent differential inputs.

Either input can be selected by an external TTL or

ECL logic signal. The amplifier is externally compen-

sated and features a very fast input selection speed, 4ns

for either ECL or TTL. This amplifier features fully

symmetrical differential inputs due to its “classical”

operational amplifier circuit architecture. Unlike “cur-

rent-feedback” amplifier designs, the OPA678 may be

used in all op amp applications requiring high speed

and precision.

Low distortion and crosstalk make this amplifier suit-

able for RF and video applications.

The OPA678 is available in plastic DIP and SO-16

packages.

OPA678

OPA678

PDS-1136E

Printed in U.S.A. March, 1998