OP297EZ

更新时间： 2024-11-03 22:44:47

品牌	Logo	应用领域
亚德诺 - ADI		运算放大器
页数	文件大小	规格书
16页	191K
描述
Dual Low Bias Current Precision Operational Amplifier

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OP297EZ 数据手册

8/21/97 4:00 PM

Dual Low Bias Current

Precision Operational Amplifier

OP297

FEATURES

PIN CONNECTIONS

Precision Performance in Standard SO-8 Pinout

Low Offset Voltage: 50 ␮V max

Low Offset Voltage Drift: 0.6 ␮V/؇C max

Very Low Bias Current:

Plastic Epoxy-DIP (P Suffix)

8-Pin Cerdip (Z Suffix)

8-Pin Narrow Body SOIC (S Suffix)

␣ ␣ +25؇C (100 pA max)

␣␣␣55؇C to +125؇C (450 pA max)

Very High Open-Loop Gain (2000 V/mV min)

Low Supply Current (Per Amplifier): 625 ␮A max

Operates From 62 V to 620 V Supplies

High Common-Mode Rejection: 120 dB min

Pin Compatible to LT1013, AD706, AD708, OP221,

␣ ␣ LM158, and MC1458/1558 with Improved Performance

OUT A 1

8 V+

–

–IN A

+IN A

V–

7 OUT B

6 –IN B

–

+IN B

APPLICATIONS

Strain Gauge and Bridge Amplifiers

High Stability Thermocouple Amplifiers

Instrumentation Amplifiers

Photo-Current Monitors

High-Gain Linearity Amplifiers

Long-Term Integrators/Filters

Sample-and-Hold Amplifiers

Peak Detectors

Errors due to common-mode signals are eliminated by the

OP297’s common-mode rejection of over 120 dB. The

OP297’s power supply rejection of over 120 dB minimizes

offset voltage changes experienced in battery powered systems.

Supply current of the OP297 is under 625 µA per amplifier and

it can operate with supply voltages as low as ±2 V.

The OP297 utilizes a super-beta input stage with bias current

cancellation to maintain picoamp bias currents at all tempera-

tures. This is in contrast to FET input op amps whose bias

currents start in the picoamp range at 25°C, but double for

every 10°C rise in temperature, to reach the nanoamp range

above 85°C. Input bias current of the OP 297 is under 100 pA

at 25°C and is under 450 pA over the military temperature

range.

Logarithmic Amplifiers

Battery-Powered Systems

GENERAL DESCRIPTION

The OP297 is the first dual op amp to pack precision perfor-

mance into the space-saving, industry standard 8-pin SO pack-

age. Its combination of precision with low power and extremely

low input bias current makes the dual OP297 useful in a wide

variety of applications.

Combining precision, low power and low bias current, the

OP297 is ideal for a number of applications including instru-

mentation amplifiers, log amplifiers, photodiode preamplifiers

and long-term integrators. For a single device, see the OP97;

for a quad, see the OP497.

Precision performance of the OP297 includes very low offset,

under 50 µV, and low drift, below 0.6 µV/°C. Open-loop gain

exceeds 2000 V/mV insuring high linearity in every application.

400

–

1200 UNITS

= ±15V

= +25°C

= ±15V

= 0V

300

200

100

–40

–60

–100 –80 –60 –40 –20

20 40 60 80 100

–75 –50 –25

25 50 75 100 125

INPUT OFFSET VOLTAGE (µV)

TEMPERATURE (°C)

Figure 1. Low Bias Current Over Temperature

REV. D

Figure 2. Very Low Offset

Information furnished by Analog Devices is believed to be accurate and

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

use, nor for any infringements of patents or other rights of third parties

which 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: 617/329-4700

Fax: 617/326-8703

World Wide Web Site: http://www.analog.com

12 3 4 5 6 7...16

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OP297EZ 替代型号

型号	品牌	替代类型	描述	数据表
OP37GPZ	ADI	功能相似	Low Noise, Precision, High Speed tional Amplifier
OP37GP	ADI	功能相似	Low Noise, Precision, High Speed Operational Amplifier

与OP297EZ相关器件

型号	品牌	获取价格	描述	数据表
OP-297EZ	ADI	获取价格	DUAL LOW BIAS CURRENT PRECISION OPERATIONAL AMPLIFIER
OP297FAB	TTELEC	获取价格	Plastic Infrared Emitting Diode
OP297FP	ADI	获取价格	Dual Low Bias Current Precision Operational Amplifier
OP-297FP	ADI	获取价格	DUAL LOW BIAS CURRENT PRECISION OPERATIONAL AMPLIFIER
OP297FPZ	ADI	获取价格	Dual Low Bias Current Precision Operational Amplifier
OP297FS	ADI	获取价格	Dual Low Bias Current Precision Operational Amplifier
OP297FS-REEL	ADI	获取价格	Dual Low Bias Current Precision Operational Amplifier
OP297FS-REEL7	ADI	获取价格	Dual Low Bias Current Precision Operational Amplifier
OP297FSZ	ADI	获取价格	Dual Low Bias Current Precision Operational Amplifier
OP297FSZ-REEL	ADI	获取价格	Dual Low Bias Current Precision Operational Amplifier

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