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AD8418A Datasheet

AD8418A Datasheet

Bidirectional, Zero-Drift, Current Sense Amplifier
Part No.: AD8418A
Page: 18 Pages
Size: 405 KB
Manufacturer: Analog Devices, Inc.
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Update Time: 2025-01-11 19:59:30
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AD8418A Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
AD8418ABRMZ Tube 50 Y5J 1 8 -40°C ~ 125°C 8-Lead MSOP  
AD8418ABRMZ-RL Reel 3000 Y5J 1 8 -40°C ~ 125°C 8-Lead MSOP  
AD8418AWBRMZ Tube 50 Y5G 1 8 -40°C ~ 125°C 8-Lead MSOP  
AD8418AWBRMZ-RL Reel 3000 Y5G 1 8 -40°C ~ 125°C 8-Lead MSOP  
AD8418AWBRZ Tube 98 AD8418AWBRZ 1 8 -40°C ~ 125°C 8-Lead SOIC_N  
AD8418AWBRZ-RL Reel 2500 AD8418AWBRZ 1 8 -40°C ~ 125°C 8-Lead SOIC_N  
AD8418AWHRZ Tube 98 AD8418AWHRZ 1 8 -40°C ~ 150°C 8-Lead SOIC_N  
AD8418AWHRZ-RL Reel 2500 AD8418AWHRZ 1 8 -40°C ~ 150°C 8-Lead SOIC_N  
AD8418AWHRMZ Tube 50 Y5H 1 8 -40°C ~ 150°C 8-Lead MSOP  
AD8418AWHRMZ-RL Reel 3000 Y5H 1 8 -40°C ~ 150°C 8-Lead MSOP  
AD8418AWBRMZ-10 Tube 50 A3Z 1 10 -40°C ~ 125°C 10-lead MSOP  
AD8418AWBRMZ-10RL Reel 3000 A3Z 1 10 -40°C ~ 125°C 10-lead MSOP  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

AD8418A Datasheet(PDF)

AD8418A Datasheet(Picture)

AD8418A 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

AD8418A Applications

  • High-side current sensing in
    • Motor controls
    • Solenoid controls
    • Power management
  • Low-side current sensing
  • Diagnostic protection

AD8418A Description

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).

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