The A1698 is a Hall-effect based, integrated circuit (IC) that provides a user-friendly solution for two-wire, speed sensing of ring magnets or ferrous targets (when back-biased by the user) down to zero-speed in applications where speed and direction is required. The A1698 is offered in the UB package, which integrates the IC and a high temperature ceramic capacitor in a single overmolded SIP package. The integrated capacitor provides enhanced EMC performance.
The integrated circuit incorporates Hall-effect circuits and signal processing that switches in response to differential magnetic signals created by magnetic encoders, or, when properly back-biased with a magnet, from ferromagnetic targets. The circuitry contains a sophisticated digital circuit that reduces magnet and system offsets, calibrates the gain for air gap independent switch points, and provides true zero-speed operation.
The regulated current output is configured for two-wire interface circuitry and is ideally suited for obtaining speed and direction information in wheel speed applications. The 2-pin SIP package is lead (Pb) free, with tin lead frame plating.
