AD8418A
Info : RECOMMENDED FOR NEW DESIGNS
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AD8418A

Bidirectional, Zero-Drift, Current Sense Amplifier

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 12
1ku List Price Starting From $1.17
Features
  • Typical 0.1 μV/°C offset drift
  • Maximum ±200 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, continuous operation
    • −3 V to +80 V, continuous survival
  • Minimum DC common-mode rejection ratio (CMRR): 90 dB
  • Initial gain = 20 V/V
  • Wide operating temperature range
    • AD8418AWB and AD8418AB: −40°C to +125°C
    • AD8418AWH: −40°C to +150°C
  • Bidirectional operation
  • Available in 8-lead SOIC_N, 8-lead MSOP, and FMEA tolerant
    • 10-lead MSOP pinout
  • AEC-Q100 qualified for automotive applications
Additional Details
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The AD8418A 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 AD8418A offers excellent input common-mode rejection from −2 V to +70 V. The AD8418A performs bidirectional current measurements across a shunt resistor in a variety of automotive and industrial applications, including motor control, power management, and solenoid control.

The AD8418A offers breakthrough performance throughout the −40°C to +150°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 AD8418A is qualified for automotive applications. The device 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 ±100 μV. The AD8418A is offered in an 8-lead MSOP and an 8-lead SOIC_N package with a 10-lead MSOP pinout option engineered for failure mode and effects analysis (FMEA).

Applications

  • High-side current sensing in
    • Motor controls
    • Solenoid controls
    • Power management
  • Low-side current sensing
  • Diagnostic protection
Part Models 12
1ku List Price Starting From $1.17

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
AD8418ABRMZ
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AD8418ABRMZ-RL
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AD8418AWBRMZ
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AD8418AWBRMZ-10
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AD8418AWBRMZ-10RL
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AD8418AWBRMZ-RL
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AD8418AWBRZ
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AD8418AWBRZ-RL
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AD8418AWHRMZ
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AD8418AWHRMZ-RL
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AD8418AWHRZ
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AD8418AWHRZ-RL
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Part Models

Product Lifecycle

PCN

Oct 12, 2018

- 18_0156

Revision to AD8418A Data Sheet Absolute Maximum Ratings Table

AD8418ABRMZ

PRODUCTION

AD8418ABRMZ-RL

PRODUCTION

AD8418AWBRMZ

PRODUCTION

AD8418AWBRMZ-RL

PRODUCTION

AD8418AWBRZ

PRODUCTION

AD8418AWBRZ-RL

PRODUCTION

AD8418AWHRMZ

PRODUCTION

AD8418AWHRMZ-RL

PRODUCTION

AD8418AWHRZ

PRODUCTION

AD8418AWHRZ-RL

PRODUCTION

Mar 8, 2016

- 15_0176

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

AD8418ABRMZ

PRODUCTION

AD8418ABRMZ-RL

PRODUCTION

AD8418AWBRMZ

PRODUCTION

AD8418AWBRMZ-RL

PRODUCTION

AD8418AWHRMZ

PRODUCTION

AD8418AWHRMZ-RL

PRODUCTION

Aug 31, 2015

- 14_0246

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

Filter by Model

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Part Models

Product Lifecycle

PCN

Oct 12, 2018

- 18_0156

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Revision to AD8418A Data Sheet Absolute Maximum Ratings Table

AD8418ABRMZ

PRODUCTION

AD8418ABRMZ-RL

PRODUCTION

AD8418AWBRMZ

PRODUCTION

AD8418AWBRMZ-RL

PRODUCTION

AD8418AWBRZ

PRODUCTION

AD8418AWBRZ-RL

PRODUCTION

AD8418AWHRMZ

PRODUCTION

AD8418AWHRMZ-RL

PRODUCTION

AD8418AWHRZ

PRODUCTION

AD8418AWHRZ-RL

PRODUCTION

Mar 8, 2016

- 15_0176

arrow down

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

AD8418ABRMZ

PRODUCTION

AD8418ABRMZ-RL

PRODUCTION

AD8418AWBRMZ

PRODUCTION

AD8418AWBRMZ-RL

PRODUCTION

AD8418AWHRMZ

PRODUCTION

AD8418AWHRMZ-RL

PRODUCTION

Aug 31, 2015

- 14_0246

arrow down

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

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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EVAL-AD8418A

AD8418A Evaluation Board for Bidirectional, Zero-Drift, Current Sense Amplifier

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EVAL-AD8418A

AD8418A Evaluation Board for Bidirectional, Zero-Drift, Current Sense Amplifier

AD8418A Evaluation Board for Bidirectional, Zero-Drift, Current Sense Amplifier

Product Detail

The AD8418ARM-EVALZ accommodates the AD8418A in the MSOP package, while the AD8418AR-EVALZ accommodates the AD8418A in an SOIC package.

The AD8418A data sheet for this device should be consulted in conjunction with this evaluation board user guide documentation.

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.

Reference Designs

Reference Designs 1

Figure 1. CN0548 Block Diagram

Isolated High Voltage, High Current, Measurement Module

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cn0548

Isolated High Voltage, High Current, Measurement Module

cn0548

Circuits from the lab

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Isolated High Voltage, High Current, Measurement Module

Features and Benefits

  • Wide Current (+/-10 A) and Voltage (80 V) Input Range
  • Configurable gain/attenuation settings
  • Galvanically Isolated
  • Arduino form factor compatible
View Detailed Reference Design external link

Design & Integration Tools

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Videos

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May 13, 2022

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CN0548: Isolated High Voltage, High Current, Measurement Module

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