Two-wire differential speed sensor ICs is easily assembled and used in wide variety of target sensing applications

Stocked by Digi-Key, the A1699 from Allegro Microsystems is an optimised dual-channel, Hall effect IC that provides a user-friendly solution for direction detection and true zero-speed, digital ring magnet sensing. The small package can be easily assembled and used in conjunction with a wide variety of target sensing applications. The IC employs patented algorithms for the special operational requirements of automotive transmission applications. The speed and direction of the target are communicated through a variable pulse width output protocol. The sensor is particularly adept at handling vibration without sacrificing maximum air gap capability or creating any erroneous direction information. The advanced vibration detection algorithm will systematically calibrate the sensor IC on the initial magnetic poles of true target rotation and not on vibration, always guaranteeing an accurate signal in running mode. Advanced signal processing and innovative algorithms make the device an ideal solution for a wide range of speed and direction sensing needs.