AD621A

更新时间： 2024-11-18 22:38:59

品牌	Logo	应用领域
亚德诺 - ADI		仪表放大器
页数	文件大小	规格书
16页	665K
描述
Low Drift, Low Power Instrumentation Amplifier

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AD621A 数据手册

Low Drift, Low Power

Instrumentation Amplifier

AD621

CONNECTION DIAGRAM

8-Pin Plastic Mini-DIP (N), Cerdip (Q)

and SOIC (R) Packages

FEATURES

EASY TO USE

Pin-Strappable Gains of 10 & 100

All Errors Specified for Total System Performance

Higher Performance than Discrete In-Amp Designs

Available in 8-Pin DIP and SOIC

Low Power, 1.3 mA max Supply Current

Wide Power Supply Range (؎2.3 V to ؎18 V)

G=10/100

–IN

AD621

OUTPUT

REF

+IN

EXCELLENT DC PERFORMANCE

0.15% max, Total Gain Error

؎5 ppm/؇C, Total Gain Drift

–V

TOP VIEW

125 ␮V max, Total Offset Voltage

1.0 ␮V/؇C max, Offset Voltage Drift

pin strapping. The AD621 is fully specified as a total system,

therefore, simplifying the design process.

LOW NOISE

9 nV/√Hz, @ 1 kHz, Input Voltage Noise

0.28 ␮V p-p Noise (0.1 Hz to 10 Hz}

For portable or remote applications, where power dissipation,

size and weight are critical, the AD621 features a very low sup-

ply current of 1.3 mA max and is packaged in a compact 8-pin

SOIC, 8-pin plastic DIP or 8-pin cerdip. The AD621 also

excels in applications requiring high total accuracy, such as pre-

cision data acquisition systems used in weigh scales and trans-

ducer interface circuits. Low maximum error specifications

including nonlinearity of 10 ppm, gain drift of 5 ppm/°C, 50 µV

offset voltage and 0.6 µV/°C offset drift (“B” grade), make pos-

sible total system performance at a lower cost than has been pre-

viously achieved with discrete designs or with other monolithic

instrumentation amplifiers.

EXCELLENT AC SPECIFICATIONS

800 kHz Bandwidth (G = 10}, 200 kHz (G = 100}

12 ␮s Settling Time to 0.01%

APPLICATIONS

Weigh Scales

Transducer Interface & Data Acquisition Systems

Industrial Process Controls

Battery Powered and Portable Equipment

PRODUCT DESCRIPTION

The AD621 is an easy to use, low cost, low power, high accu-

racy instrumentation amplifier which is ideally suited for a wide

range of applications. Its unique combination of high perfor-

mance, small size and low power, outperforms discrete in amp

implementations. High functionality, low gain errors and low

gain drift errors are achieved by the use of internal gain setting

resistors. Fixed gains of 10 and 100 can be easily set via external

When operating from high source impedances, as in ECG and

blood pressure monitors, the AD621 features the ideal combina-

tion of low noise and low input bias currents. Voltage noise is

specified as 9 nV/√Hz at 1 kHz and 0.28 µV p-p from 0.1 Hz to

10 Hz. Input current noise is also extremely low at 0.1 pA/√Hz.

The AD621 outperforms FET input devices with an input bias

current specification of 1.5 nA max over the full industrial tem-

perature range.

30,000

10,000

25,000

3 - OP AMP

IN-AMPS

TYPICAL STANDARD

1,000

BIPOLAR INPUT

20,000

(3 OP 07'S)

IN-AMP

15,000

100

AD621A

10,000

AD621 SUPERßETA

5,000

BIPOLAR INPUT

IN-AMP

SUPPLY CURRENT – mA

0.1

10k

100k

SOURCE RESISTANCE – Ω

10M

100M

Three Op Amp IA Designs vs. AD621

Total Voltage Noise vs. Source Resistance

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, 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

12 3 4 5 6 7...16

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与AD621A相关器件

型号	品牌	获取价格	描述	数据表
AD621ACHIPS	ADI	获取价格	Low Drift, Low Power Instrumentation Amplifier
AD621AN	ADI	获取价格	Low Drift, Low Power Instrumentation Amplifier
AD621ANZ	ADI	获取价格	Low Drift, Low Power Instrumentation Amplifier
AD621AR	ADI	获取价格	Low Drift, Low Power Instrumentation Amplifier
AD621AR-REEL	ADI	获取价格	IC INSTRUMENTATION AMPLIFIER, 185 uV OFFSET-MAX, 0.2 MHz BAND WIDTH, PDSO8, PLASTIC, SOIC-
AD621AR-REEL7	ADI	获取价格	Low Drift, Low Power Instrumentation Amp with fixed gains of 10 and 100
AD621AR-REEL7	ROCHESTER	获取价格	INSTRUMENTATION AMPLIFIER, 185 uV OFFSET-MAX, 0.2 MHz BAND WIDTH, PDSO8, PLASTIC, SOIC-8
AD621ARZ	ATMEL	获取价格	Three-wire Serial Electrically Erasable Programmable Read-only Memory
AD621ARZ	ADI	获取价格	Low Drift, Low Power Instrumentation Amp with fixed gains of 10 and 100
AD621ARZ-REEL	ADI	获取价格	IC INSTRUMENTATION AMPLIFIER, 185 uV OFFSET-MAX, 0.2 MHz BAND WIDTH, PDSO8, PLASTIC, SOIC-

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