Dual-output speed and direction sensor simplifies design

Posted By : Nat Bowers
Dual-output speed and direction sensor simplifies design

Designed for the automotive, industrial, white goods and commercial markets, Allegro MicroSystems has introduced a dual-output sensor IC. The ATS605 differential speed and direction sensor simplifies mechanical design and installation and can sense much smaller or higher resolution teeth for increased accuracy.

Typical applications for Allegro’s ATS605 sensor IC include industrial motor control (forklifts, robotics & rotational gearing), electric motor position and sliding door/long-travel bi-directional sensing.

Two independent differential channels are created by three Hall elements. A sophisticated digital circuit within the IC, designed to eliminate the detrimental effects of magnet and system offsets, processes the channels. The Hall differential signals produce a highly accurate speed output and can provide information on rotation direction.

Signal offset and amplitude is optimised with advanced calibration techniques which, combined with the digital tracking of the signal, enable accurate switch-points over air gap and temperature. Open-drain outputs provide voltage output signals which mirror the sensed target’s shape. A phase separation between the two channels is also provided. This separation is proportionate to the size of the target teeth vs. the Hall element spacing.

The ATS605 speed and direction sensor IC is available now in a 4-lead SIP package. An optional SG package incorporates a rare earth pellet for ease of manufacturing, consistent performance over temperature and enhanced reliability.


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