Datasheet > OPA643

OPA643

更新时间： 2024-11-08 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

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替代型号

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OPA643 数据手册

OPA643

OPA658

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-1_1191D

1993 Burr-Brown Corporation

Printed in U.S.A. March, 1998

OPA643

SBOS025

12 3 4 5 6 7...18

中文翻译

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OPA643 替代型号

型号	品牌	替代类型	描述	数据表
OPA843	TI	功能相似	Dual, Wideband, Low-Noise, Voltage-Feedback Operational Amplifier

与OPA643相关器件

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OPA6430UR	ROITHNER	获取价格	Visible LED
OPA643HS	BB	获取价格	Operational Amplifier, 1 Func, 1500uV Offset-Max, BIPolar, CDIP8,
OPA643HSQ	BB	获取价格	Operational Amplifier, 1 Func, 5000uV Offset-Max, BIPolar, CDIP8,
OPA643N	BB	获取价格	Wideband Low Distortion, High Gain OPERATIONAL AMPLIFIER
OPA643N	TI	获取价格	Wideband Low Distortion, High Gain OPERATIONAL AMPLIFIER
OPA643N/250	TI	获取价格	Wideband Low Distortion, High Gain Operational Amplifier 5-SOT-23
OPA643N/3K	TI	获取价格	Wideband Low Distortion, High Gain Operational Amplifier 5-SOT-23
OPA643N-250	TI	获取价格	Wideband Low Distortion, High Gain OPERATIONAL AMPLIFIER
OPA643N-3K	TI	获取价格	Wideband Low Distortion, High Gain OPERATIONAL AMPLIFIER
OPA643NB	BB	获取价格	Wideband Low Distortion, High Gain OPERATIONAL AMPLIFIER

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