Diodes Incorporated

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Low-Voltage, High-Sensitivity Automotive Hall Effect Latch Switch

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The AH1711Q/AH1712Q/AH1713Q/AH1714Q is an AEC-Q100 qualified low-voltage, high-sensitivity Hall effect latch IC designed for brushless DC-motor commutation speed measurement, angular or linear encoders and position sensors in automotive applications. To support a wide range of demanding applications, the design is optimized to operate at 2.4V to 5.5V. With chopper stabilized architecture and an internal bandgap regulator to provide temperature compensated supply for internal circuits, the device provides a reliable solution over the whole operating range.

The open-drain output of AH1711Q/AH1712Q/AH1713Q can be switched on when applying South pole with sufficient magnetic near the top of the package, while North pole with sufficient magnetic strength causes the open-drain output switched off (AH1714Q polarity inverted). When the magnetic flux density (B) perpendicular to the package is larger than the operate point (Bop) the output is switched on (pulled low). The output is held latched until magnetic flux density reverses and becomes lower than the release point (Brp).


  • Latch Operation
  • High Sensitivity: Bop and Brp of ±7 Gauss and ±18 Gauss
  • Open-Drain Output
  • 4V to 5.5V Operating Voltage Range
  • Chopper Stabilized Design Provides
    • Superior Temperature Stability
    • Minimal Switch Point Drift
    • Enhanced Immunity to Stress
  • Good RF Noise Immunity
  • Fast 30kHz Sensing Bandwidth
  • -40°C to +150°C Operating Temperature
  • ESD: HBM 8kV, CDM 2kV
  • AEC-Q100 Grade 0 Qualified
  • Industry Standard SOT23 Package
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green Device (Note 3)
  • The AH1711Q/AH1712Q/AH1713Q/AH1714Q is suitable for automotive applications requiring specific change control; this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF16949 certified facilities. https://www.diodes.com/quality/product-definitions/


  • Brushless DC-motor commutation
  • Revolution per minute (RPM) measurements
  • Wheel speed/angular/speed sensing
  • Fuel pumps/windows/sunroofs/sliding doors
  • Human machine interface knobs

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Automotive
AEC Qualified Yes
Type Latch
Outputs Single
Output Type Open Drain
Active Output State (B > Bop) High-Z
Inactive Output State (B < Brp) Low
Operating Voltage (V) 2.4 to 5.5
Average Supply Current (mA) 2
Min Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 2
Typ Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 18
Max Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 45
Min Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) -45
Typ Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) -18
Max Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) -2
Operating Ambient Temperature (°C) -40 to 150

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