Datasheet > AD8218_13

AD8218_13

更新时间： 2022-05-20 03:24:14

品牌	Logo	应用领域
亚德诺 - ADI		监控
页数	文件大小	规格书
16页	361K
描述
Zero Drift, Bidirectional Current Shunt Monitor

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AD8218_13 数据手册

Zero Drift, Bidirectional

Current Shunt Monitor

Data Sheet

AD8218

FEATURES

FUNCTIONAL BLOCK DIAGRAM

High common-mode voltage range

4 V to 80 V operating

AD8218

−0.3 V to +85 V survival

Buffered output voltage

Gain = 20 V/V

Wide operating temperature range: −40°C to +125°C

Excellent ac and dc performance

100 nV/°C typical offset drift

50 µV typical offset

–IN

+IN

OUT

LDO

ENB

GND

REF

5 ppm/°C typical gain drift

110 dB typical CMRR at dc

Figure 1.

APPLICATIONS

High-side current sensing

48 V telecom

Power management

Base stations

Bidirectional motor control

Precision high voltage current sources

GENERAL DESCRIPTION

The AD8218 is a high voltage, high resolution current shunt

amplifier. It features a set gain of 20 V/V, with a maximum

0.35% gain error over the entire temperature range. The

buffered output voltage directly interfaces with any typical

converter. The AD8218 offers excellent input common-mode

rejection from 4 V to 80 V. The AD8218 performs bidirectional

current measurements across a shunt resistor in a variety of

industrial and telecom applications, including motor control,

battery management, and base station power amplifier bias

control.

The AD8218 offers breakthrough performance throughout the

−40°C to +125°C temperature range. It features a zero-drift core,

which leads to a typical offset drift of 100 nV/°C throughout

the operating temperature range and the common-mode voltage

range. Special attention is devoted to output linearity being

maintained throughout the input differential voltage range of

0 mV to ~250 mV. The AD8218 also includes an internal 80 mV

reference that can be enabled for optimal dynamic range in

unidirectional current sense applications. The typical input

offset voltage is 50 µ V.

The AD8218 is offered in an 8-lead MSOP package and an

8-lead LFCSP package.

Rev. B

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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.

Technical Support

www.analog.com

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