Diodes Incorporated

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27V Open-Drain Hall Effect Latch

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The AH3713Q/AH3714Q/AH3715Q/AH3716Q/AH3717Q is an AECQ100 qualified high-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 over the supply range of 3.0V to 27V. 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. For robustness and protection, the device has a reverse blocking diode with a Zener clamp on the supply. The output has an overcurrent limit and a Zener clamp.

The single, open-drain output can be switched on with South pole of sufficient strength and switched off with North pole of sufficient strength. 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).

The magnetic operating and release polarity is opposite for SOT23 (Type S) and SC59 packages. SOT23 (Type S) and SIP-3 (Bulk Pack) packages will require South pole to the part marking side to operate while SC59 will require South pole to the non part-marking side.


  • Bipolar Latch (South Pole: On, North Pole: Off)
  • 0V to 27V Operating Voltage Range
  • 40V Load Dump Protection
  • Sensitivity Options: BOP and BRP of ±30G to ±140G Typical
  • Resistant to Physical Stress
  • Single, Open-Drain Output with Overcurrent Limit
  • Chopper-Stabilized Design Provides
    • Superior Temperature Stability
    • Minimal Switch-Point Drift
    • Enhanced Immunity to Stress
  • Good RF Noise Immunity
  • Reverse-Blocking Diode and Zener Clamp on Supply
  • -40°C to +150°C Operating Temperature
  • ESD HBM: 8kV, CDM: 1kV
  • AEC-Q100 Grade 0 Qualified
  • Industry Standard SC59, SOT23 (Type S), SIP-3 (Bulk Pack) Packages
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • The AH3713Q/AH3714Q/AH3715Q/AH3716Q/AH3717Q 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) measurement
  • Flow meters
  • Angular and linear encoders and position sensors
  • Contactless commutation, speed measurement and angular position sensing/indexing in automotive applications

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) Low
Inactive Output State (B < Brp) High-Z
Operating Voltage (V) 3 to 27
Average Supply Current (mA) 2.8
Min Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 50
Typ Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 70
Max Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 90
Min Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) -90
Typ Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) -70
Max Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) -50
Output Current Capability (mA) 140
Operating Ambient Temperature (°C) -40 to 150

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