Allegro Microsystems’ A17301 Hall effect sensor IC is suitable for two-wheeled vehicles, particularly in position and timing applications like speedometers and tachometers for engine control. Integrating electromagnetic capability (EMC) components into a small SIP package, the A17301 is a solution for digital ring-magnet sensing or ferromagnetic target sensing when coupled with a back-biasing magnet. The device eliminates the need for external filter capacitors while reducing the cost of a final sensor assembly. The IC incorporates dual Hall-effect elements with 2.2-mm spacing and signal processing that switches in response to differential magnetic signals.
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The A17301 contains sophisticated digital circuits to reduce system offsets, to calibrate the gain for air gap independent switch points, and to achieve true zero-speed operation. Running mode recalibration provides immunity to environmental effects such as micro-oscillations of the target or sudden air gap changes. The use of a digital peak detector for output switching control ensures that the input signal is continuously and accurately tracked, regardless of the amount of signal shift between output edges.
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Available in a three-pin SIP (suffix UC) with 100% matte-tin lead frame plating and an operating ambient temperature range of –40°C to +160°C, the A17301PUCF is priced at $0.99 each/1,000. For more details and specs, view the A17301 product page and/or download the A17301 datasheet.