AD8418A:  Bidirectional, Zero-Drift, Current Sense Amplifier

Product Details

Product Status:Recommended for New Designs

The AD8418A is a high voltage, high resolution current shunt amplifier. It features an initial gain of 20 V/V, with a maximum ±0.2% 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 +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 AD8418A is qualified for automotive applications. The devices 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 AD8418A 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

FEATURES and BENEFITS

  • 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
  • Common-mode rejection ratio (CMRR): 86 dB, dc to 10 kHz
  • 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
  • Qualified for automotive applications

Functional Block Diagram for AD8418A

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD8418A SPICE Macro Model SPICE Models HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

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Price, packaging, availability

AD8418A Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8418ABRMZ Status: Production 8 ld MSOP 8 Tube, 50 - - Y  Material Info Notify Me Contact ADI
AD8418ABRMZ-RL Status: Production 8 ld MSOP 8 Reel, 3000 - $0.99 Y  Material Info Notify Me Purchase
AD8418AWBRMZ Status: Production 8 ld MSOP 8 Tube, 50 $1.18 $1.14 Y  Material Info Notify Me Purchase
AD8418AWBRMZ-RL Status: Production 8 ld MSOP 8 Reel, 3000 - $1.14 Y  Material Info Notify Me Purchase
AD8418AWBRZ Status: Production 8 ld SOIC 8 Auto Tube, 98 $1.18 $1.14 Y  Material Info Notify Me Purchase
AD8418AWBRZ-RL Status: Production 8 ld SOIC 8 Auto Reel, 2500 - $1.14 Y  Material Info Notify Me Purchase
AD8418AWHRMZ Status: Pre-Release 8 ld MSOP 8 Tube, 50 - - Y  Material Info Notify Me Contact ADI
AD8418AWHRMZ-RL Status: Pre-Release 8 ld MSOP 8 Reel, 3000 - - Y  Material Info Notify Me Contact ADI
AD8418AWHRZ Status: Pre-Release 8 ld SOIC 8 Tube, 98 - - Y  Material Info Notify Me Contact ADI
AD8418AWHRZ-RL Status: Pre-Release 8 ld SOIC 8 Reel, 2500 - - Y  Material Info Notify Me Contact ADI
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

AD8418A Evalation Board for Bidirectional, Zero-Drift, Current Sense Amplifier
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8418AR-EVALZ Status: Production Eval Board for 8 Lead SOIC $83.40 Yes -
AD8418ARM-EVALZ Status: Production Eval Board for 8 Lead MSOP $83.40 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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