AD8231

更新时间： 2024-11-18 04:30:59

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
8页	137K
描述
Zero Drift, Digital Programmable Instrumentation Amplifier

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AD8231 数据手册

Zero Drift, Digital Programmable

Instrumentation Amplifier

Preliminary Data Sheet

AD8231

FEATURES

Digitally programmable gain

G= 1, 2, 4, 8, 16, 32, 64, 128

Software or pin programmable

Excellent temperature performance

Specified from −40°C to +125°C

50 nV/°C max input offset drift

10 ppm/°C max gain drift

Excellent dc performance

122 dB min CMR, G = 128

25 μV max input offset voltage

100 pA max bias current

SDN

OUT2

-IN

OUT1

+IN

0.7 uV p-p (0.1 Hz to 10 Hz)

Good ac performance

AD8231

-VS

REF

+VS

Gain Bandwidth Product 1 MHz

Slew Rate 0.7 V/ꢀs

Figure 1. AD8231 Functional Diagram

Rail-to-rail input and output

Shutdown/Multiplex

Additional uncommitted op amp

Supply range: 3.0V to 5.5V

APPLICATIONS

Pressure and Strain Transducers

Thermocouples and RTDs

Programmable Instrumentation

Industrial Controls

Weigh Scales

GENERAL DESCRIPTION

The AD8231 also includes an uncommitted op amp which can

be used for additional gain, differential signal driving or

filtering. Like the in amp, the op amp has an autozero

architecture, rail to rail input, and rail to rail output.

The AD8231 is a low drift, rail to rail, instrumentation amplifier

with software programmable gains of 1, 2, 4, 8, 16, 32, 64 or

128. The gains are programmed via digital logic or pin

strapping.

The AD8231 includes a shutdown feature that reduces current

to 1 uA and makes the amplifier output high impedance. This

allows easy multiplexing of multiple amplifiers without

additional switches.

The AD8231 is ideal for applications that require precision

performance over a wide temperature range, such as industrial

temperature sensing and data logging. Because the gain setting

resistors are internal, maximum gain drift is only 10 ppm/ºC.

Because of the autozero input stage, maximum input offset is 25

uV and maximum input offset drift is just 50 nV/ºC. CMRR is

also guaranteed over temperature: 80 dB for G=1, increasing to

122 dB at a gain of 128. Voltage noise is just 0.7 uV p-p (0.01

Hz to 10 Hz).

The AD8231 is specified over the extended industrial

temperature range of -40°C to +125°C. It is available in a 4mm

x 4mm 16-Lead LFCSP (Chip Scale) package.

Rev. PrC

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

12 3 4 5 6 7 8

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与AD8231相关器件

型号	品牌	获取价格	描述	数据表
AD8231_07	ADI	获取价格	Zero Drift, Digital Programmable Instrumentation Amplifier
AD8231_1	ADI	获取价格	Zero Drift, Digitally Programmable Instrumentation Amplifier
AD82311	ADI	获取价格	10 MHz, 20 V/レs, G = 1, 10, 100, 1000 i CMOS㈢
AD8231ACPZ-R7	ADI	获取价格	Zero Drift, Digitally Programmable Instrumentation Amplifier
AD8231ACPZ-R7	ROCHESTER	获取价格	INSTRUMENTATION AMPLIFIER, 15 uV OFFSET-MAX, 1 MHz BAND WIDTH, QCC16, 4 X 4 MM, ROHS COMPL
AD8231ACPZ-RL	ADI	获取价格	Zero Drift, Digitally Programmable Instrumentation Amplifier
AD8231ACPZ-WP	ADI	获取价格	Zero Drift, Digitally Programmable Instrumentation Amplifier
AD8231ACPZ-WP	ROCHESTER	获取价格	INSTRUMENTATION AMPLIFIER, 15 uV OFFSET-MAX, 1 MHz BAND WIDTH, QCC16, 4 X 4 MM, ROHS COMPL
AD8231-EVALZ	ADI	获取价格	Zero Drift, Digitally Programmable Instrumentation Amplifier
AD8231TCPZ-EP-R7	ADI	获取价格	Zero Drift, Digitally Programmable Instrumentation Amplifier

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