®

OPA642

1

10MSPS

clk

402

Ω

24

Ω

1Vp-p

5MHz

OPA642

100pF

REFT

+5V

REFB

ADS804

12-Bit

10MSPS

Measured

80dB SFDR

Analog

Input

402

Ω

0.1µF

0.1µF

5k

Ω

High Dynamic Range 10MSPS Digitizer

5k

Ω

0.1µF

2Vp-p

+5V

–5V

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

Wideband, Low Distortion, Low Gain

OPERATIONAL AMPLIFIER

APPLICATIONS

q ADC/DAC BUFFER AMPLIFIER

q LOW DISTORTION IF AMPLIFIER

q HIGH RESOLUTION IMAGING

q MEDICAL IMAGING

q LOW NOISE PREAMPLIFIER

q HIGH CMR DIFFERENCING AMPLIFIER

q TEST INSTRUMENTATION

q PROFESSIONAL AUDIO

FEATURES

q LOW DISTORTION: –95dBc at 5MHz

q GAIN OF +1 BANDWIDTH: 400MHz

q AVAILABLE IN SOT23-5 PACKAGE

q HIGH OPEN LOOP GAIN: 95dB

q HIGH COMMON-MODE REJECTION: 90dB

q FAST 12-BIT SETTLING: 13ns (0.01%)

q LOW NOISE: 2.7nV/

√Hz

q HIGH OUTPUT CURRENT:

q VERY LOW DIFF GAIN/PHASE ERROR:

0.007%/0.008

°

®

OPA642

OPA642

OPA658

OPA642

DESCRIPTION

The OPA642 provides a level of speed and dynamic

range previously unattainable in a monolithic op amp.

Using a unity gain stable voltage feedback architec-

ture with two internal gain stages, the OPA642 achieves

exceptionally low harmonic distortion over a wide

frequency range. The “classic” differential input pro-

vides all the familiar benefits of precision op amps,

such as bias current cancellation and very low invert-

ing current noise compared with wideband current

feedback op amps. Fast settling time, excellent differ-

ential gain/phase performance, low voltage noise and

high output current drive make the OPA642 ideal for

most high dynamic range applications.

Unity gain stability makes the OPA642 particularly

suitable for low gain differential amplifiers,

transimpedance amplifiers, gain of +2 video line driv-

ers, wideband integrators and low distortion ADC buff-

ers. Where higher gain or even lower harmonic distor-

tion is required, consider the OPA643—a higher gain-

bandwidth and lower noise version of the OPA642

PDS-1190F

Printed in U.S.A. February, 1998