AD8418WBRMZ-RL

更新时间： 2024-11-25 12:36:11

品牌	Logo	应用领域
亚德诺 - ADI		运算放大器放大器电路光电二极管
页数	文件大小	规格书
16页	300K
描述
Bidirectional, Zero Drift, Current Sense Amplifier

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AD8418WBRMZ-RL 数据手册

Bidirectional, Zero Drift,

Current Sense Amplifier

AD8418

Data Sheet

FEATURES

GENERAL DESCRIPTION

Typical 0.1 µV/°C offset drift

The AD8418 is a high voltage, high resolution current shunt

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

0.15% gain error over the entire temperature range. The

buffered output voltage directly interfaces with any typical

converter. The AD8418 offers excellent input common-mode

rejection from −2 V to +70 V. The AD8418 performs bidirectional

current measurements across a shunt resistor in a variety of

automotive and industrial applications, including motor

control, battery management, and solenoid control.

Maximum 400 µV voltage offset over full temperature range

2.7 V to 5.5 V power supply operating range

Electromagnetic interference (EMI) filters Included

High common-mode input voltage range

−2 V to +70 V operating

−4 V to +85 V survival

Initial gain = 20 V/V

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

Bidirectional operation

Available in 8-lead SOIC and 8-lead MSOP

Common-mode rejection ratio (CMRR): 86 dB, dc to 10 kHz

Qualified for automotive applications

The AD8418 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 0.1 µV/°C throughout the

operating temperature range and the common-mode voltage

range. The AD8418 is fully qualified for automotive applications

and includes EMI filters and patented circuitry to enable output

accuracy with pulse-width modulation (PWM) type input

common-mode voltages. The typical input offset voltage is

200 µV. The AD8418 is offered in 8-lead MSOP and SOIC

packages.

APPLICATIONS

High-side current sensing in

Motor controls

Solenoid controls

Power management

Low-side current sensing

Diagnostic protection

Table 1. Related Devices

Part No.

AD8205

AD8206

AD8207

AD8210

Description

Current sense amplifier, gain = 50

Current sense amplifier, gain = 20

High accuracy current sense amplifier, gain = 20

High speed current sense amplifier, gain = 20

FUNCTIONAL BLOCK DIAGRAM

= –2V TO +70V

V = 2.7V TO 5.5V

70V

REF

OUT

AD8418

+IN

–IN

EMI

–

FILTER

SHUNT

OUT

G = 20

SHUNT

V /2

EMI

FILTER

50A

SHUNT

–50A

GND

REF

Figure 1.

Rev. 0

Document Feedback

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

rightsof third parties that may result fromits 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 andregisteredtrademarks 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

Technical Support

www.analog.com

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AD8418WBRMZ-RL 替代型号

型号	品牌	替代类型	描述	数据表
AD8418WBRMZ	ADI	类似代替	Bidirectional, Zero Drift, Current Sense Amplifier
AD8418BRMZ	ADI	类似代替	Bidirectional, Zero Drift, Current Sense Amplifier

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