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OPA643 PDF预览

OPA643

更新时间: 2024-11-05 02:58:31
品牌 Logo 应用领域
德州仪器 - TI 放大器
页数 文件大小 规格书
18页 195K
描述
Wideband Low Distortion, High Gain OPERATIONAL AMPLIFIER

OPA643 数据手册

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®
OPA643  
OPA643  
O
OPA643  
Wideband Low Distortion, High Gain  
OPERATIONAL AMPLIFIER  
FEATURES  
APPLICATIONS  
LOW DISTORTION: –90dBc at 5MHz  
BASE STATION ADC PREAMP  
ADC/DAC BUFFER AMPLIFIER  
LOW DISTORTION IF AMPLIFIER  
LOW NOISE: 2.3nV/Hz  
GAIN-BANDWIDTH PRODUCT: 800MHz  
AVAILABLE IN SOT23-5 PACKAGE  
STABLE IN GAINS 3  
LOW NOISE, BROADBAND,  
TRANSIMPEDANCE AMPLIFIER  
LOW NOISE PREAMPLIFIER  
VIDEO AMPLIFICATION  
TEST INSTRUMENTATION  
HIGH SLEW RATE: 1000V/µs  
HIGH OPEN-LOOP GAIN: 95dB  
HIGH OUTPUT CURRENT: ±60mA  
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  
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  
+5V  
ADS805  
0.1µF  
50Ω  
2Vp-p  
Low Gain  
Compensation  
0.1µF  
280Ω  
Analog  
Measured  
80dB SFDR  
12-Bit  
Input  
OPA643  
20MSPS  
47pF  
50Ω  
–5V  
Source  
402Ω  
806Ω  
5kΩ  
1Vp-p  
10MHz  
REFB  
2.7pF  
0.1µF  
56.9Ω  
14pF  
High Dynamic Range 20MSPS Digitizer  
International Airport Industrial Park  
Mailing Address: PO Box 11400, Tucson, AZ 85734  
FAXLine: (800) 548-6133 (US/Canada Only)  
• Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111  
Internet: http://www.burr-brown.com/  
Cable: BBRCORP  
Telex: 066-6491  
FAX: (520) 889-1510  
Immediate Product Info: (800) 548-6132  
©
PDS-1191D  
1993 Burr-Brown Corporation  
Printed in U.S.A. March, 1998  
SBOS025  

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