OPA129UB

更新时间： 2024-11-06 22:27:59

品牌	Logo	应用领域
BB		运算放大器
页数	文件大小	规格书
7页	642K
描述
Ultra-Low Bias Current Difet OPERATIONAL AMPLIFIER

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OPA129UB 数据手册

OPA129

Ultra-Low Bias Current Difet^®

OPERATIONAL AMPLIFIER

FEATURES

APPLICATIONS

● ULTRA-LOW BIAS CURRENT: 100fA max

● PHOTODETECTOR PREAMP

● LOW OFFSET: 2mV max

● CHROMATOGRAPHY

● LOW DRIFT: 10µV/°C max

● ELECTROMETER AMPLIFIERS

● MASS SPECTROMETER

● pH PROBE AMPLIFIER

● HIGH OPEN-LOOP GAIN: 94dB min

● LOW NOISE: 15nV/√Hz at 10kHz

● PLASTIC DIP and SOIC PACKAGE

● ION GAGE MEASUREMENT

DESCRIPTION

The OPA129 is an ultra-low bias current mono-

lithic operational amplifier offered in an 8-pin PDIP

and SO-8 package. Using advanced geometry

dielectrically-isolated FET (Difet^®) inputs, this mono-

lithic amplifier achieves a high performance level.

Substrate

V+

Difet fabrication eliminates isolation-junction leakage

current—the main contributor to input bias current

with conventional monolithic FETs. This reduces

input bias current by a factor of 10 to 100. Very low

input bias current can be achieved without resorting to

small-geometry FETs or CMOS designs which can

suffer from much larger offset voltage, voltage noise,

drift, and poor power supply rejection.

–In

Noise-Free

Cascode

+In

The OPA129's special pinout eliminates leakage cur-

rent that occurs with other op amps. Pins 1 and 4 have

no internal connection, allowing circuit board guard

traces—even with the surface-mount package version.

Output

30kΩ

OPA129 is available in 8-pin DIP and SO-8 packages,

specified for operation from –40°C to +85°C.

V–

Simplified Circuit

Difet^®Burr-Brown Corp.

International Airport Industrial Park

•

Mailing Address: PO Box 11400

Cable: BBRCORP

•

Tucson, AZ 85734

•

Street Address: 6730 S. Tucson Blvd.

•

Tucson, AZ 85706

Tel: (520) 746-1111 Twx: 910-952-1111

•

Telex: 066-6491

•

FAX: (520) 889-1510

•

Immediate Product Info: (800) 548-6132

PDS-1195A

Printed in U.S.A. July, 1994

12 3 4 5 6 7

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