The A1421, A1422, and A1423 are ac-coupled Hall-effect sensors which include monolithic integrated circuits that switch in response to changing differential magnetic fields created by rotating ring magnets, or when coupled with a magnet, by ferrous targets. This family of devices also includes an integrated capacitor, providing the high accuracy of analog sensing without an external filter capacitor. This reduces cost and components, while improving the reliability of the final sensor solution. |