OPA643 Burr-Brown, OPA643 Datasheet

OPA643

Manufacturer Part Number

OPA643

Description

Wideband Low Distortion / High Gain OPERATIONAL AMPLIFIER

Manufacturer

Burr-Brown

Datasheet

1.OPA643.pdf (17 pages)

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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

DESCRIPTION

The OPA643 provides a level of speed and dynamic

range previously unattainable in a monolithic op amp.

Using a de-compensated voltage feedback architec-

ture with two internal gain stages, the OPA643 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. High slew rate and open-loop gain,

along with low input noise and high output current

10MHz

1993 Burr-Brown Corporation

1Vp-p

LOW DISTORTION: –90dBc at 5MHz

LOW NOISE: 2.3nV/ Hz

GAIN-BANDWIDTH PRODUCT: 800MHz

AVAILABLE IN SOT23-5 PACKAGE

STABLE IN GAINS

HIGH SLEW RATE: 1000V/ s

HIGH OPEN-LOOP GAIN: 95dB

HIGH OUTPUT CURRENT: 60mA

Compensation

Low Gain

Source

56.9

Wideband Low Distortion, High Gain

402

0.1µF

OPERATIONAL AMPLIFIER

280

14pF

High Dynamic Range 20MSPS Digitizer

OPA643

+5V

–5V

806

2.7pF

2Vp-p

0.1µF

PDS-1191D

drive make the OPA643 ideal for very high dynamic

range requirements.

The high gain bandwidth product for the gain

stable OPA643 makes it particularly suitable for

wideband transimpedance amplifiers and moderate gain

IF amplifier applications. External compensation

techniques may be used to apply the OPA643 at low

gains giving exceptionally low distortion and frequency

response flatness. Where unity gain stability with

comparable distortion performance is required, consider

the OPA642.

APPLICATIONS

TEST INSTRUMENTATION

BASE STATION ADC PREAMP

ADC/DAC BUFFER AMPLIFIER

LOW DISTORTION IF AMPLIFIER

LOW NOISE, BROADBAND,

TRANSIMPEDANCE AMPLIFIER

LOW NOISE PREAMPLIFIER

VIDEO AMPLIFICATION

47pF

0.1µF

REFT

Analog

REFB

Input

ADS805

20MSPS

12-Bit

+5V

OPA643

Printed in U.S.A. March, 1998

OPA643

80dB SFDR

Measured

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