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

Easy to use

Available in space-saving MSOP

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 specifications

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

instrumentation amplifier that delivers the industry’s highest

CMRR over frequency in its class. 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.

Rev. B

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.

−40°C to +85°C

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

825 kHz, –3 dB bandwidth (G = 1)

2 V/μs slew rate

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

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

90 dB minimum CMRR (G = 1)

25 μV maximum input offset voltage

0.3 μV/°C maximum input offset drift

0.4 nA maximum input bias current

Precision Instrumentation Amplifier

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

Tel: 781.329.4700

Fax: 781.461.3113

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.

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 a low cost 8-lead SOIC and 8-lead

MSOP, 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

See Typical Performance Characteristics for expected operation from

85°C to 125°C.

120

110

100

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

CONNECTION DIAGRAM

100

+IN

–IN

FREQUENCY (Hz)

TOP VIEW

AD8221

Figure 1.

COMPETITOR 1

COMPETITOR 2

AD8221

REF

–V

OUT

10k

AD8221

www.analog.com

100k

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