Diodes Incorporated AH3711Q Automotive Hall-Effect Latches

Diodes Incorporated AH3711Q Automotive Hall-Effect Latches are designed for brushless DC-motor commutation, angular/linear encoders, speed measurement, and position sensors in automotive applications. The AEC-Q100-qualified, high-voltage, high-sensitivity AH3711Q is optimized to perform over a 3V to 27V supply range. The chopper-stabilized architecture and an internal bandgap regulator provide a temperature-compensated supply for internal circuits.

The Diodes Inc AH3711Q Automotive Hall-Effect Latches offer robustness and protection, with a reverse blocking diode with a zener clamp on the supply, and the output has an overcurrent limit and a zener clamp. The single, open-drain output can be switched on with the South pole and switched off with the North pole, both with sufficient strength. When the magnetic flux density (B) perpendicular to the package exceeds the operating point (BOP), the output is switched on (pulled low). The output is held latched until the magnetic flux density reverses and falls below the release point (BRP). The magnetic operating and release polarity is opposite for the SOT23 (Type S) and SC59 packages. For operation, the SOT23 (Type S) and SIP-3 (Bulk Pack) packages require the south pole on the part-marking side, and the SC59 requires the south pole on the non-part-marking side.

Features

Bipolar latch: south pole on, north pole off 3V to 27V operating voltage range, load dump voltage up to 40V
High sensitivity: BOP and BRP of 10G typical
Resistant to physical stress
Single, open-drain output
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 the supply
40°C to +150°C operating temperature
ESD HBM: 8kV, CDM: 1kV
Industry-standard SC59, SOT23 (Type S), and SIP-3 (bulk pack)
Totally lead-free and fully RoHS compliant
Halogen and antimony-free "Green" device
For automotive applications requiring specific change control, this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities

Applications

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