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GMR Gear tooth speed sensors IC are Hall Effect devices designed for use in ferrous edge detection/near zero speed sensing applications. They generate sinking current.
The GMR effect’s core idea is based on electron spins. Electron scattering rates in a magneto resistor increase or decrease as a result of the interaction between the spin state of the electrons and the magnetic orientation of the medium through which the electrons are moving.
The Global GMR gear tooth sensor IC market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
The Allegro’s GMR-based IC is developed for usage in conjunction with ferromagnetic gear-tooth targets and is oriented compatible with Hall-effect technology.
The fully-integrated solution senses large operating air gaps and over a large air gap range. In response to low-level differential magnetic signals, state-of-the-art GMR technology on a monolithic IC with industry-leading signal processing gives accurate speed and direction information.
Differential sensing has the intrinsic capability of rejecting interfering common-mode magnetic fields. The working air gap has the greatest dynamic range (50% bigger).
With full pitch immunity (pitch = one tooth/valley of a gear), it distinguishes vibration from rotation.Keeps track of faulty or damaged gears. Differentially measures stray magnetic fields to reject commode-mode stray magnetic fields. To be used with ferromagnetic gear-tooth targets. Transmission gear tooth detection
