Diodes Incorporated

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The AH49H is a small, versatile linear Hall-effect device that is operated by the magnetic field from a permanent magnet or an electromagnet. The output voltage is set by the supply voltage and varies in proportion to the strength of the magnetic field. The integrated circuitry features low noise output, which makes it unnecessary to use external filtering components. It also includes precision resistors to provide increased temperature stability and accuracy. The operating temperature range of these linear Hall sensors is -40°C to +105°C, appropriate for commercial, consumer, and industrial environments.


  • Miniature Construction
  • Power Consumption of 2mA at VCC = 3.3V for Energy Efficiency
  • Single Current Sourcing Output
  • Linear Output for Circuit Design Flexibility
  • Low Noise Output Virtually Eliminates the Need for Filtering
  • A Stable and Accurate Output
  • Temperature Range: -40°C to +105°C
  • Responds to Either Positive or Negative Gauss
  • The Maximum Instantaneous Supply Voltage Up to 50V
  • High ESD Rating: 6000V (Human Body Model) 400V (Machine Model)
  • Application(s)

  • Current Sensing
  • Motor Control
  • Position Sensing
  • Magnetic Code Reading
  • Rotary Encoder
  • Ferrous Metal Detector
  • Vibration Sensing
  • Liquid Level Sensing
  • Weight Sensing
  • Product Specifications

    Product Parameters

    Compliance (Only Automotive(Q) supports PPAP) Standard
    Output Type Voltage Output
    Operating Voltage (V) 3 to 8 V
    Average Supply Current (µA) 3mA
    Typical Sensitivity (mV/Gauss) 0.33 mV/Gauss
    Output Voltage Span (V) 0.85 to 2.6 V
    Linearity of Span 0.70%
    Null Output Voltage VCC/2
    Magnetic Flux Density Range Gauss (Min) -
    Magnetic Flux Density Range Gauss (Typ) ±3000 Typ
    Operating Ambient Temperature (°C) -40 to 105 °C

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    Product Change Notices (PCNs)

    A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

    PCN # Issue Date Implementation Date Subject
    PCN-2490 2020-10-22 2021-01-22 Additional Wafer Source (LiteOn Semiconductor Corp.)