Allegro MicroSystems has announced a new gear-tooth sensor integrated circuit. The ATS684LSN combines an optimized, industry-proven Hall effect integrated circuit; rare-earth pellet; and high-temperature ceramic capacitor in a single overmold package. The solution reduces the need for external EMI protection, and eliminates the need for additional manufacturing steps throughout the supply chain by simplifying the overall system design.
The sensor’s dual element differential design provides stable, signal perturbation-immune, output performance for speed sensing applications. In the presence of a rotating ferromagnetic target, the back-bias magnet creates a differential magnetic signal.
The single overmold design integrates key operating components to reduce mechanical tolerances and consistently achieve optimal operating performance, whether as an industrial gear speed sensor or an automotive transmission sensor. The quality and reliability that automotive companies demand in their applications are ensured by a built-in test capability and an automotive-grade semiconductor process (i.e., transmission speed sensor ICs). The advanced algorithms and two-wire regulated current output offer a solution for obtaining edge and duty cycle information in gear-tooth-based applications such as transmission speed.
The ATS684 is provided in a lead (Pb) free, two-pin back-biased SIP package (suffix SN) with tin leadframe plating.