AD8418
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AD8418

Bidirectional, Zero-Drift, Current Sense Amplifier

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SPICE Model AD8418 SPICE Macro Model Download 2.65 KB
Part Models 6
1ku List Price Starting From $1.05
Features
  • Typical 0.1 μV/°C offset drift
  • 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
Additional Details
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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.

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
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file View Data Sheet (Rev.0)
Documentation View All Documentation
SPICE Model AD8418 SPICE Macro Model Download 2.65 KB
Part Models 6
1ku List Price Starting From $1.05
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AD8418

Documentation

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Data Sheet

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UPDATED 10/02/2013
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AD8418: Bidirectional, Zero Drift, Current Sense Amplifier Data Sheet (Rev.0)

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UPDATED 09/01/2013
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AD8418: 双方向、ゼロ・ドリフトの 電流検出アンプ

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User Guide

2

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WIKI

UPDATED 05/22/2014
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AD8418: Evaluation Board for the Current Sense Amplifier redirect icon

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WIKI

UPDATED 06/18/2014
Chinese
AD8418：用于电流检测放大器的评估板 redirect icon

Application Note

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UPDATED 05/13/2016
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AN-1321: Common-Mode Transients in Current Sense Applications (Rev.0) redirect icon

119.03 K

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UPDATED 05/13/2016
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AN-1321：电流检测应用中的共模瞬态 (Rev.0) redirect icon

246.83 K

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UPDATED 05/13/2016
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AN-1321: 電流検出アプリケーションのコモンモード・トランジェント redirect icon

119.03 K

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UPDATED 06/25/2014
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AN-1308: Common-Mode Step Response of Current Sense Amplifiers (Rev.A) redirect icon

176 kB

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UPDATED 06/25/2014
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AN-1308: 电流检测放大器共模阶跃响应 (Rev.0) redirect icon

545.42 K

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UPDATED 06/25/2014
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AN-1308: 電流検出アンプの同相ステップ応答 (Rev.0) redirect icon

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UPDATED 06/06/2019
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AN-1318: Differential Overvoltage Protection Circuits for Current Sense Amplifiers (Rev.0) redirect icon

171.45 K

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UPDATED 01/19/2016
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AN-1318：用于电流检测放大器的差分电压保护电路 (Rev.0) redirect icon

260.47 K

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UPDATED 02/25/2016
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AN-1318: 電流検出アンプ用差動過電圧保護回路 redirect icon

171.45 K

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UPDATED 07/04/2024
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AN-1321: Common-Mode Transients in Current Sense Applications redirect icon

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Documentation

Documentation

Technical Documents 6
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Data Sheet 1

AD8418: Bidirectional, Zero Drift, Current Sense Amplifier Data Sheet (Rev.0)

User Guide 1

AD8418: Evaluation Board for the Current Sense Amplifier

Application Note 4

AN-1321: Common-Mode Transients in Current Sense Applications (Rev.0)
AN-1308: Common-Mode Step Response of Current Sense Amplifiers (Rev.A)
AN-1318: Differential Overvoltage Protection Circuits for Current Sense Amplifiers (Rev.0)
AN-1321: Common-Mode Transients in Current Sense Applications

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
AD8418BRMZ 8-Lead MSOP external-link
  • HTML
  • Material Declaration external-link
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  • Reliablity Data external-link
AD8418BRMZ-RL 8-Lead MSOP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
AD8418WBRMZ 8-Lead MSOP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
AD8418WBRMZ-RL 8-Lead MSOP external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
AD8418WBRZ 8-Lead SOIC external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
AD8418WBRZ-RL 8-Lead SOIC external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link

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Product Lifecycle

PCN

Mar 8, 2016

- 15_0176

Assembly Transfer of Select 8/10L MSOP Products to Amkor Philippines

AD8418BRMZ

PRODUCTION

AD8418BRMZ-RL

PRODUCTION

AD8418WBRMZ

PRODUCTION

AD8418WBRMZ-RL

PRODUCTION

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PCN15_0176_Form

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Material_Report

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Detailed Change Description

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Qualification Results Summary

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Qualification Results Summary

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Aug 31, 2015

- 14_0246

Qualification of ASE Chungli, as an Alternate Assembly Site for Select MSOP Devices

AD8418BRMZ

PRODUCTION

AD8418BRMZ-RL

PRODUCTION

pdf

PCN14_0246_Form

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xls

Material_Report

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Detailed Change Description

pdf

Qualification Results Summary

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Part Models

Product Lifecycle

PCN

Mar 8, 2016

- 15_0176

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Assembly Transfer of Select 8/10L MSOP Products to Amkor Philippines

AD8418BRMZ

PRODUCTION

AD8418BRMZ-RL

PRODUCTION

AD8418WBRMZ

PRODUCTION

AD8418WBRMZ-RL

PRODUCTION

pdf

PCN15_0176_Form

external-icon

xls

Material_Report

Download
Detailed Change Description

pdf

Qualification Results Summary

external-icon

pdf

Qualification Results Summary

external-icon
Aug 31, 2015

- 14_0246

arrow down

Qualification of ASE Chungli, as an Alternate Assembly Site for Select MSOP Devices

AD8418BRMZ

PRODUCTION

AD8418BRMZ-RL

PRODUCTION

pdf

PCN14_0246_Form

external-icon

xls

Material_Report

Download
Detailed Change Description

pdf

Qualification Results Summary

external-icon
Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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EVAL-AD8418

AD8418 Evaluation Board

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EVAL-AD8418

AD8418 Evaluation Board

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EVAL-AD8418
AD8418 Evaluation Board

Features and Benefits

  • Enables quick breadboarding/protoyping
  • Easily configurable for unidirectional or bidirectional operation
  • Includes provision for current sense resistor
  • Easy connection to test equipment
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Product Detail

The AD8418-EVALZ is designed to aid in the evaluation of current sense amplifiers.Enables quick breadboarding/protoyping and is easily configurable for unidirectional or bidirectional operation.


The AD8418-EVALZ accommodates the AD8418 in an MSOP package.


The AD8418 data sheet for this device should be consulted in conjunction with this evaluation board user guide documentation.

Resources

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WIKI

AD8418: Evaluation Board for the Current Sense Amplifier reference design link

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Evaluation Kits1

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EVAL-AD8418

AD8418 Evaluation Board
Tools & Simulations

Tools & Simulations 2

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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