Diodes Incorporated

Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details.

U DFN2020 6 Type F

Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details.

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The AH49F 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.
The AH49F is available in standard TO-92S, SC59 and U-DFN2020-6 packages.


  • Power Consumption of 3.0mA at VCC = 5V for Energy Efficiency
  • Single Current Sourcing Output
  • Linear Voltage 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)
    • 600V (Machine Model)
  • Small low profile U-DFN2020-6 and Industry Standard SC59 and TO-92S Packages
  • Totally Lead-free & Fully RoHS Compliant 
  • Halogen and Antimony Free. “Green” Device


  • Position Sensing
  • Liquid Level Sensing
  • Weight Sensing
  • Ferrous Metal Detector
  • Vibration Sensing
  • Rotary Encoder
  • Magnetic Code Reading
  • Motor Control
  • Current 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) 2.1 mV/Gauss
Output Voltage Span (V) 0.8 to (VCC - 0.8) V
Linearity of Span 0.70%
Null Output Voltage VCC/2
Magnetic Flux Density Range Gauss (Min) ±500
Magnetic Flux Density Range Gauss (Typ) ±800 Typ
Operating Ambient Temperature (°C) -40 to 105 °C

Related Content


Technical Documents

Recommended Soldering Techniques


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-2651 2023-11-13 2023-11-13 Qualified Additional Fab Source, Assembly Test Sites, Die Revision, BOM, Datasheet, Tape and Reel Packing Quantity.
PCN-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site
PCN-2490 2020-10-22 2021-01-22 Additional Wafer Source (LiteOn Semiconductor Corp.)