AD620SQ/883B

更新时间： 2024-11-03 04:04:11

品牌	Logo	应用领域
亚德诺 - ADI		仪表放大器放大器电路
页数	文件大小	规格书
20页	1000K
描述
Low Cost Low Power Instrumentation Amplifier

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中文翻译

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数据手册

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AD620SQ/883B 数据手册

Low Cost Low Power

Instrumentation Amplifier

AD620

FEATURES

Easy to use

CONNECTION DIAGRAM

Gain set with one external resistor

(Gain range 1 to 10,000)

–IN

+IN

Wide power supply range ( 2.3 V to 18 V)

Higher performance than 3 op amp IA designs

Available in 8-lead DIP and SOIC packaging

Low power, 1.3 mA max supply current

Excellent dc performance (B grade)

50 µV max, input offset voltage

0.6 µV/°C max, input offset drift

1.0 nA max, input bias current

100 dB min common-mode rejection ratio (G = 10)

Low noise

9 nV/√Hz @ 1 kHz, input voltage noise

0.28 µV p-p noise (0.1 Hz to 10 Hz)

Excellent ac specifications

120 kHz bandwidth (G = 100)

15 µs settling time to 0.01%

OUTPUT

REF

–V

AD620

TOP VIEW

Figure 1. 8-Lead PDIP (N), CERDIP (Q), and SOIC (R) Packages

PRODUCT DESCRIPTION

The AD620 is a low cost, high accuracy instrumentation

amplifier that requires only one external resistor to set gains of

1 to 10,000. Furthermore, the AD620 features 8-lead SOIC and

DIP packaging that is smaller than discrete designs and offers

lower power (only 1.3 mA max supply current), making it a

good fit for battery-powered, portable (or remote) applications.

The AD620, with its high accuracy of 40 ppm maximum

nonlinearity, low offset voltage of 50 µV max, and offset drift of

0.6 µV/°C max, is ideal for use in precision data acquisition

systems, such as weigh scales and transducer interfaces.

Furthermore, the low noise, low input bias current, and low power

of the AD620 make it well suited for medical applications, such

as ECG and noninvasive blood pressure monitors.

APPLICATIONS

Weigh scales

ECG and medical instrumentation

Transducer interface

Data acquisition systems

Industrial process controls

Battery-powered and portable equipment

The low input bias current of 1.0 nA max is made possible with

the use of Superϐeta processing in the input stage. The AD620

works well as a preamplifier due to its low input voltage noise of

9 nV/√Hz at 1 kHz, 0.28 µV p-p in the 0.1 Hz to 10 Hz band,

and 0.1 pA/√Hz input current noise. Also, the AD620 is well

suited for multiplexed applications with its settling time of 15 µs

to 0.01%, and its cost is low enough to enable designs with one

in-amp per channel.

30,000

10,000

25,000

20,000

15,000

10,000

5,000

3 OP AMP

IN-AMP

1,000

(3 OP-07s)

TYPICAL STANDARD

BIPOLAR INPUT

IN-AMP

100

G = 100

AD620A

AD620 SUPERβETA

BIPOLAR INPUT

IN-AMP

0.1

10k

100k

10M

100M

SUPPLY CURRENT (mA)

SOURCE RESISTANCE (

Ω

)

Figure 2. Three Op Amp IA Designs vs. AD620

Figure 3. Total Voltage Noise vs. Source Resistance

Rev. G

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 that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

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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中文翻译

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