Diodes Incorporated

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Dual Hall Effect Latch with Speed & Direction Output

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The AH3965/AH3966/AH3967/AH3968 is a high voltage dual Hall-effect sensor designed for the applications that require accurate speed and direction sensing. To support wide range of demanding applications, the design has been optimized to operate over the supply range of 2.7V to 27V. With chopper stabilized architecture and an internal bandgap regulator to provide temperature compensated supply for internal circuits, the AH3965/AH3966/AH3967 provides speed and direction outputs, while the AH3968 provides two independent outputs at Q1 and Q2.

For robustness and protection, the device has a reverse blocking diode with a Zener clamp on the supply.

In the occasion of a supply voltage drop to minimum threshold point, undervoltage lockout protection would be triggered to freeze the device, which prevents the electrical malfunction from affecting the next magnetic measurement circuits, and the output current state updated is always based on the proper accurate measurement result.


  • Dual Latch Hall Operation with Dual Outputs (AH3968) or Speed & Direction Output (AH3965/AH3966/AH3967)
  • Wide Supply Voltage Operation: 2.7V to 27V
  • Chopper Stabilized Design Provides
    • Superior Temperature Stability
    • Minimal Switch Point Drift
    • Enhanced Immunity to Stress
  • Battery Polarity Reverse Connection Protection
  • Transient Spike Voltage Protection
  • UVLO Protection
  • High ESD Rating: HBM = 5kV, CDM = 2kV
  • Temperature Range: -40°C to +125°C
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/


  • Industrial motors
  • White goods
  • Pumps
  • Rotation speed & direction detection
  • Linear speed & direction detection
  • Angular position detection

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Standard
AEC Qualified No
Type Latch
Outputs Dual Speed & Direction
Output Type Open Drain
Operating Voltage (V) 2.7 to 27
Average Supply Current (mA) 4.7
Min Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 8
Typ Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 25
Max Operating Point Bop (Bops +ve/ Bopn -ve) (Gauss) 42
Min Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) -42
Typ Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) -25
Max Release Point Brp (Brps +ve/ Brpn -ve) (Gauss) -8
Operating Ambient Temperature (°C) -40 to 125

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