OP227

更新时间： 2024-11-03 22:44:43

品牌	Logo	应用领域
亚德诺 - ADI		运算放大器仪表
页数	文件大小	规格书
16页	380K
描述
Dual, Low Noise, Low Offset Instrumentation Operational Amplifier

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数据手册

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OP227 数据手册

Dual, Low Noise, Low Offset

Instrumentation Operational Amplifier

OP227

FEATURES

PIN CONNECTIONS

Excellent Individual Amplifier Parameters

Low V_OS, 80 ␮V Max

NULL (A)

V+ (A)

Offset Voltage Match, 80 ␮V Max

Offset Voltage Match vs. Temperature, 1 ␮V/؇C Max

Stable V_OSvs. Time, 1 ␮V/M_OMax

Low Voltage Noise, 3.9 nV/÷Hz Max

Fast, 2.8 V/␮s Typ

OUT (A)

V– (A)

–IN (A)

+IN (A)

V– (B)

+IN (B)

–IN (B)

NULL (B)

OUT (B)

High Gain, 1.8 Million Typ

High Channel Separation, 154 dB Typ

V+ (B)

NOTE

1. DEVICE MAY BE OPERATED EVEN IF INSERTION

IS REVERSED; THIS IS DUE TO INHERENT SYMMETRY

OF PIN LOCATIONS OF AMPLIFIERS A AND B

2. V–(A) AND V–(B) ARE INTERNALLY CONNECTED VIA

SUBSTRATE RESISTANCE

GENERAL DESCRIPTION

between amplifiers. These outstanding input current specifications

are realized through the use of a unique input current cancellation

circuit which typically holds I_Band I_OSto ±20 nA and 15 nA

respectively over the full military temperature range.

The OP227 is the first dual amplifier to offer a combination of

low offset, low noise, high speed, and guaranteed amplifier matching

characteristics in one device. The OP227, with a V_OSmatch of

25 mV typical, a TCV_OSmatch of 0.3 mV/∞C typical and a 1/f corner

of only 2.7 Hz is an excellent choice for precision low noise designs.

These dc characteristics, coupled with a slew rate of 2.8 V/ms

typical and a small-signal bandwidth of 8 MHz typical, allow the

designer to achieve ac performance previously unattainable with

op amp based instrumentation designs.

Other sources of input referred errors, such as PSRR and CMRR,

are reduced by factors in excess of 120 dB for the individual

amplifiers. DC stability is assured by a long-term drift application

of 1.0 mV/month.

Matching between channels is provided on all critical param-

eters including offset voltage, tracking of offset voltage versus

temperature, noninverting bias current, CMRR, and power

supply rejection ratio. This unique dual amplifier allows the

elimination of external components for offset nulling and

frequency compensation.

When used in a three op amp instrumentation configuration, the

OP227 can achieve a CMRR in excess of 100 dB at 10 kHz. In

addition, this device has an open-loop gain of 1.5 M typical with

a 1 kW load. The OP227 also features an I_Bof ±10 nA typical,

an I_OSof 7 nA typical, and guaranteed matching of input currents

SIMPLIFIED SCHEMATIC

V+

Q22

NULL

Q46

Q45

R12

Q21

R23

R24

Q20 Q19

Q23

Q24

OUTPUT

NON

INVERTING

INPUT (+)

Q1A Q1B Q2B Q2A

INVERTING

INPUT (–)

R11 C4

Q11

Q12

Q26

Q27

Q28

V-

*R1 AND R2 ARE PREMATURELY ADJUSTED AT WAFER TEST FOR MINIMUM OFFSET VOLTAGE.

REV. A

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

www.analog.com

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与OP227相关器件

型号	品牌	获取价格	描述	数据表
OP-227	ADI	获取价格	DUAL, LOW-NOISE LOW OFFSET INSTRUMENTATION OPERATIONAL AMPLIFIER
OP-227A883	ETC	获取价格	MICROCIRCUIT, LINEAR, LOW NOISE OPERATIONAL AMPLIFIER, MONOLITHIC SILICON
OP-227AJ	Linear	获取价格	IC DUAL OP-AMP, 80 uV OFFSET-MAX, 8 MHz BAND WIDTH, CDIP14, HERMETIC SEALED, DIP-14, Opera
OP227AJ/883	Linear	获取价格	OP227AJ/883
OP227AJ/883B	Linear	获取价格	DUAL OP-AMP, 80uV OFFSET-MAX, 8MHz BAND WIDTH, CDIP14
OP-227AJ/883B	Linear	获取价格	DUAL OP-AMP, 80uV OFFSET-MAX, 8MHz BAND WIDTH, CDIP14
OP-227AJ883B	ETC	获取价格	MICROCIRCUIT, LINEAR, LOW NOISE OPERATIONAL AMPLIFIER, MONOLITHIC SILICON
OP227AY	ETC	获取价格	Operational Amplifier
OP-227AY	ADI	获取价格	DUAL, LOW-NOISE LOW OFFSET INSTRUMENTATION OPERATIONAL AMPLIFIER
OP227AY/883	ADI	获取价格	IC DUAL OP-AMP, 180 uV OFFSET-MAX, 8 MHz BAND WIDTH, CDIP14, HERMETIC SEALED, CERAMIC, DIP

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