VF526DT

The Honeywell VF526DT is a dual Hall-effect digital position sensor designed for applications requiring speed and direction indication. It features two distinct Hall sensing elements precisely located on a single integrated circuit chip, encapsulated in a thermoset molding material. This sensor is suitable for environments where humidity may be a problem, as it is tested to moisture sensitivity similar to JEDEC J-STD-020B, MSL Level 1.

The VF526DT operates over a wide supply voltage range of 3.4 Vdc to 24 Vdc, providing stable operation due to its built-in regulator circuit. Its temperature-compensated magnetics and ultra-low offset drift ensure stable output across a full temperature range of -40 °C to 125 °C. The sensor's output can directly interface with many electronic components without buffering or compensation circuitry.

Packaged in a miniature, 4-pin SOT-89B surface-mount package, the VF526DT is supplied on tape and reel for automated assembly. This design allows for potential savings in PC board space and labor costs. The dual sensors and associated logic circuitry provide a frequency signal for speed output and a logic level signal for direction output, potentially replacing multiple discrete components.

Potential applications include anti-pinch electric motor control systems for power windows, power seats, power sliding doors, and sunroofs, as well as magnetic encoding for electronic steering systems. In industrial settings, it can be used for motion control systems, garage door openers, position and velocity detection, and linear displacement sensing.