OPA643 Datasheet, PDF (1/18 Pages) Burr-Brown (TI) – Wideband Low Distortion, High Gain OPERATIONAL AMPLIFIER

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OPA643
O^O_P^P_A^A6₆⁴₅3 ₈
OPA643
SBOS025
Wideband Low Distortion, High Gain
OPERATIONAL AMPLIFIER
FEATURES
q LOW DISTORTION: –90dBc at 5MHz
q LOW NOISE: 2.3nV/√Hz
q GAIN-BANDWIDTH PRODUCT: 800MHz
q AVAILABLE IN SOT23-5 PACKAGE
q STABLE IN GAINS ≥ 3
q HIGH SLEW RATE: 1000V/µs
q HIGH OPEN-LOOP GAIN: 95dB
q HIGH OUTPUT CURRENT: ±60mA
APPLICATIONS
q BASE STATION ADC PREAMP
q ADC/DAC BUFFER AMPLIFIER
q LOW DISTORTION IF AMPLIFIER
q LOW NOISE, BROADBAND,
TRANSIMPEDANCE AMPLIFIER
q LOW NOISE PREAMPLIFIER
q VIDEO AMPLIFICATION
q TEST INSTRUMENTATION
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
Low Gain
Compensation
0.1µF
+5V
280Ω
OPA643
2Vp-p ^0.1µF
drive make the OPA643 ideal for very high dynamic
range requirements.
The high gain bandwidth product for the gain ≥ 3
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.
+5V
5kΩ
REFT
0.1µF
50Ω
47pF
ADS805
Analog
Input
12-Bit
20MSPS
Measured
80dB SFDR
1Vp-p
10MHz
50Ω
Source
402Ω
56.9Ω
–5V
806Ω
14pF
2.7pF
5kΩ
REFB
0.1µF
High Dynamic Range 20MSPS Digitizer
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone] • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
©_{1993 Burr-Brown Corporation}
PDS-11191D
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OPA643 Printed in U.S.A. March, 1998