INA121

更新时间： 2024-09-16 22:48:07

品牌	Logo	应用领域
BB		仪表放大器
页数	文件大小	规格书
12页	222K
描述
FET-Input, Low Power INSTRUMENTATION AMPLIFIER

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中文翻译

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INA121 数据手册

INA121

FET-Input, Low Power

INSTRUMENTATION AMPLIFIER

FEATURES

DESCRIPTION

● LOW BIAS CURRENT: ±4pA

The INA121 is a FET-input, low power instrumenta-

tion amplifier offering excellent accuracy. Its versatile

three-op amp design and very small size make it ideal

for a variety of general purpose applications. Low bias

current (±4pA) allows use with high impedance

sources.

● LOW QUIESCENT CURRENT: ±450µA

● LOW INPUT OFFSET VOLTAGE: ±200µV

● LOW INPUT OFFSET DRIFT: ±2µV/°C

● LOW INPUT NOISE:

20nV/√Hz at f = 1kHz (G =100)

Gain can be set from 1V to 10,000V/V with a single

external resistor. Internal input protection can with-

stand up to ±40V without damage.

● HIGH CMR: 106dB

● WIDE SUPPLY RANGE: ±2.25V to ±18V

● LOW NONLINEARITY ERROR: 0.001% max

● INPUT PROTECTION TO ±40V

The INA121 is laser-trimmed for very low offset

voltage (±200µV), low offset drift (±2µV/°C), and

high common-mode rejection (106dB at G = 100). It

operates on power supplies as low as ±2.25V (+4.5V),

allowing use in battery operated and single 5V sys-

tems. Quiescent current is only 450µA.

● 8-PIN DIP AND SO-8 SURFACE MOUNT

APPLICATIONS

Package options include 8-pin plastic DIP and SO-8

surface mount. All are specified for the –40°C to

+85°C industrial temperature range.

● LOW-LEVEL TRANSDUCER AMPLIFIERS

Bridge, RTD, Thermocouple

● PHYSIOLOGICAL AMPLIFIERS

ECG, EEG, EMG, Respiratory

● HIGH IMPEDANCE TRANSDUCERS

● CAPACITIVE SENSORS

● MULTI-CHANNEL DATA ACQUISITION

● PORTABLE, BATTERY OPERATED SYSTEMS

● GENERAL PURPOSE INSTRUMENTATION

V+

INA121

Over-Voltage

Protection

–

V_IN

A₁

50kΩ

R_G

G = 1 +

40kΩ

25kΩ

A₃

V_O

R_G

A₂

Ref

Over-Voltage

Protection

40kΩ

V_IN

V–

International Airport Industrial Park

•

Mailing Address: PO Box 11400, Tucson, AZ 85734

•

Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706

Telex: 066-6491 FAX: (520) 889-1510

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

Internet: http://www.burr-brown.com/

•

FAXLine: (800) 548-6133 (US/Canada Only) Cable: BBRCORP

•

Immediate Product Info: (800) 548-6132

PDS-1412A

Printed in U.S.A. May, 1998

INA121

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