Diodes Incorporated

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Linear Hall-effect IC

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The AH49E 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. 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 +85°C, appropriate for commercial, consumer and industrial applications.


· Miniature Construction

· Power Consumption of 3.5mA at VCC = 5V 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 of -40°C to +85°C

· Responds to Either Positive or Negative Gauss


· Current Sensing

· Motor Control

· Position Sensing

· Magnetic Code Reading

· 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 6.5 V
Average Supply Current (µA) 3.5mA
Typical Sensitivity (mV/Gauss) 1.6 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) ±650
Magnetic Flux Density Range Gauss (Typ) ±1000 Typ
Operating Ambient Temperature (°C) -40 to 85 °C

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