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AD8218:  Zero Drift, Bi-Directional Current Shunt Monitor

Product Details

Product Status:Recommended for New Designs

The AD8218 is a high voltage, high resolution current shunt amplifier. It features a set gain of 20 V/V, with a maximum ±0.35% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. The AD8218 offers excellent input common-mode rejection from 4 V to 80 V. The AD8218 performs bidirectional current measurements across a shunt resistor in a variety of industrial and telecom applications, including motor control, battery management, and base station power amplifier bias control.

The AD8218 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 ±100 nV/°C throughout the operating temperature range and the common-mode voltage range. Special attention is devoted to output linearity being maintained throughout the input differential voltage range of 0 mV to ~250 mV. The AD8218 also includes an internal 80 mV reference that can be enabled for optimal dynamic range in unidirectional current sense applications. The typical input offset voltage is ±50 μV.

The AD8218 is offered in an 8-lead MSOP package.

    High-side current sensing
  • 48V telecom
  • Power Management
  • Base Stations
  • Bidirectional motor control
  • Precision high voltage current sources


  • High common-mode voltage range
    -- 4 V to 80 V operating
    -- -0.3 V to 85 V survival
  • Buffered output voltage
  • Gain = 20 V/V
  • Wide operating temperature range:
    −40°C to +125°C
  • Excellent ac and dc performance
    -- ±100 nV/°C typical offset drift
    -- ±50 μV typical offset
    -- ±5 ppm/°C typical gain drift
    -- 110 dB typical CMRR at dc

Functional Block Diagram for AD8218

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD8218 SPICE Macro Model SPICE Models HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

AD8218 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD8218BCPZ-RL Status: Production 8 ld LFCSP (3x2x.75mm) 8 Ind Reel, 10000 $1.28 $1.24 Y  Material Info PCN Purchase Sample
AD8218BCPZ-WP Status: Production 8 ld LFCSP (3x2x.75mm) 8 Ind Tray, 50 $1.28 $1.24 Y  Material Info Notify Me Purchase
AD8218BRMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $1.09 $1.05 Y  Material Info Notify Me Purchase Sample
AD8218BRMZ-R7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 $1.09 $1.05 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.

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