Allegro MicroSystems Inc. Differential Crankshaft Sensor IC A16601PUCFTN

The A16601 is an AC-coupled differential Hall-effect sensor IC designed for crankshaft speed detection, using a rotating ring magnet or ferrous target. It features a 3-pin SIP package, operates over a supply voltage range of 4.0 to 26.5 V, and supports an ambient temperature range of -40°C to 160°C. The device delivers a dual zero-crossing output capable of switching 20 mA with open-drain configuration, compatible with TTL and CMOS logic. Integrated bypass capacitors reduce external EMI components, and reverse battery protection is provided. The sensor responds to magnetic field changes from 20 Hz to 25 kHz and rejects common-mode interference due to its differential Hall element design.