Gear-Tooth Sensors include integrated filter capacitor

AC-coupled, Hall-effect gear-tooth sensors, Models A1421LK, A1422LK, and A1423LK feature monolithic integrated circuits that switch in response to changing differential magnetic fields created by moving ring magnet or by ferrous target when back-biased with magnet. On-board regulator permits operation with supply voltages of 4.0-26.5 V. Units are suited for speed, position, and timing applications such as transmission and engine management.

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Improvements include integrated capacitor, smaller package size

Worcester, MA - June 8, 2005 - Allegro MicroSystems, Inc. announces the release of the A1421LK, A1422LK, and A1423LK, improved additions to Allegro's family of AC-coupled Hall-effect gear-tooth sensors. Improvements include a smaller package size and an integrated filter capacitor to provide additional reliability to the system solution.

The A1421LK, A1422LK, and A1423LK are AC-coupled Hall-effect gear-tooth sensors with monolithic integrated circuits that switch in response to changing differential magnetic fields created by a moving ring magnet or by a ferrous target when back-biased with a magnet. These devices are ideal for use in speed, position and timing applications such as transmission and engine management. This family of devices also includes an integrated filter capacitor so a high-accuracy analog solution can be achieved without additional external components, thus improving reliability for the final sensing solution.