AD8221ARZ Analog Devices, AD8221ARZ Datasheet

AD8221ARZ

Manufacturer Part Number

AD8221ARZ

Description

Manufacturer

Analog Devices

Datasheets

1.AD8221ARZ.pdf (24 pages)

2.AD8221ARZ.pdf (20 pages)

Specifications of AD8221ARZ

09+

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FEATURES

Available in space-saving MSOP package

Gain set with 1 external resistor (gain range 1 to 1000)

Wide power supply range: ±2.3 V to ±18 V

Temperature range for specified performance:

Operational up to 125°C

EXCELLENT AC SPECIFICATONS

LOW NOISE

HIGH ACCURACY DC PERFORMANCE (AD8221BR)

APPLICATIONS

Weigh scales

Industrial process controls

Bridge amplifiers

Precision data acquisition systems

Medical instrumentation

Strain gages

Transducer interfaces

GENERAL DESCRIPTION

The AD8221 is a gain programmable, high performance instru-

mentation amplifier that delivers the industry’s highest CMRR

over frequency. The CMRR of instrumentation amplifiers on

the market today falls off at 200 Hz. In contrast, the AD8221

maintains a minimum CMRR of 80 dB to 10 kHz for all grades

at G = 1. High CMRR over frequency allows the AD8221 to

reject wideband interference and line harmonics, greatly

simplifying filter requirements. Possible applications include

precision data acquisition, biomedical analysis, and aerospace

instrumentation.

Low voltage offset, low offset drift, low gain drift, high gain

accuracy, and high CMRR make this part an excellent choice in

applications that demand the best dc performance possible,

such as bridge signal conditioning.

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 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.

80 dB min CMRR to 10 kHz ( G = 1)

825 kHz –3 dB bandwidth (G = 1)

2 V/µs slew rate

8 nV/√Hz, @ 1 kHz, max input voltage noise

0.25 µV p-p input noise (0.1 Hz to 10 Hz)

90 dB min CMRR (G = 1)

25 µV max input offset voltage

0.3 µV/°C max input offset drift

0.4 nA max input bias current

–40°C to +85°C

Precision Instrumentation Amplifier

Programmable gain affords the user design flexibility. A single

resistor sets the gain from 1 to 1000. The AD8221 operates on

both single and dual supplies, and is well suited for applications

where ±10 V input voltages are encountered.

The AD8221 is available in low cost 8-lead SOIC and MSOP

packages, both of which offer the industry’s best performance.

The MSOP requires half the board space of the SOIC, making it

ideal for multichannel or space-constrained applications.

Performance is specified over the entire industrial temperature

range of –40°C to +85°C for all grades. Furthermore, the

AD8221 is operational from –40°C to +125°C

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

Tel: 781.329.4700

Fax: 781.326.8703

See Typical Performance Curves for expected operation from 85°C to 125°C.

120

110

100

Figure 1. SOIC and MSOP Connection Diagram

Figure 2. Typical CMRR vs. Frequency for G = 1

CONNECTION DIAGRAM

100

–IN

+IN

FREQUENCY (Hz)

TOP VIEW

AD8221

COMPETITOR 1

COMPETITOR 2

AD8221

REF

–V

OUT

10k

www.analog.com

AD8221

100k

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