AD8418:  Bidirectional, Zero-Drift, Current Sense Amplifier

Product Details

Product Status:Recommended for New Designs

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

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
  • 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

Functional Block Diagram for AD8418

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD8418 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

AD8418 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8418BRMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $0.92 $0.89 Y  Material Info Notify Me Purchase Sample
AD8418BRMZ-RL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $0.89 Y  Material Info Notify Me Purchase
AD8418WBRMZ Status: Production 8 ld MSOP 8 Auto Tube, 50 $1.07 $1.03 Y  Material Info Notify Me Purchase
AD8418WBRMZ-RL Status: Production 8 ld MSOP 8 Auto Reel, 3000 - $1.03 Y  Material Info Notify Me Purchase
AD8418WBRZ Status: Production 8 ld SOIC 8 Auto Tube, 98 $1.07 $1.03 Y  Material Info Notify Me Purchase
AD8418WBRZ-RL Status: Production 8 ld SOIC 8 Auto Reel, 2500 - $1.03 Y  Material Info Notify Me Purchase
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.

AD8418 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8418-EVALZ Status: Production Eval Board for 8 Lead MSOP $83.40 Yes -
AD8418R-EVALZ Status: Production Eval Board for 8-LEAD MSOP - 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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