Hall-effect switches are most commonly used in sensing absolute position or proximity, because they require a south pole of sufficient strength to turn the output on and then removal of that field to turn the output off. These contactless sensing solutions require few external components and can withstand the hostile operating conditions of automotive applications. Typical applications include: shift selectors, wiper end/home position, door ajar/open, and vane-interrupt systems. Allegro also offers a wide selection of two-wire devices, which are often used in safety critical applications, such as seat belt buckle and seat position sensing.
Specific advantages of Allegro’s solutions include:
Allegro has a broad range of devices sensitivities that cover just about any application requirement.