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Crankshaft Position Sensors

Our direction detection, vibration robustness and high accuracy out of stop/start conditions get your high efficiency engines started quickly and smoothly. Allegro provides fully integrated crankshaft sensor IC solutions for EMC protection and excellent edge accuracy in your crankshaft applications. Optional back-biased magnets simplify design while improving performance. Our speed sensor ICs are highly flexible and programmable for your various application requirements.

Crankshaft Position Sensors Selection Guide

Selection & Solution Guides

Allegro Product Selection Guide (PDF)

Documentation & Resources

Application Note

Methods and Validation of Stray Magnetic Field Mitigation in Magnetic Speed Sensor ICs

AN296250 - This document provides an overview of the phenomena of stray magnetic fields, its various sources, solutions developed to minimize its effects, and product proposals tolerant to stray field perturbations.

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Application Note

GMR Crankshaft Target Design Guidelines

AN296198 - This application note offers guidelines for designing an optimal target for crankshaft applications.

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Brochure

Brochure: Revolutionary GMR Cam/Crankshaft Sensors

The new Allegro ATS16951 crankshaft and ATS16351 camshaft sensors leverage giant-magnetoresistance (GMR) technology to create an ideal pairing for hybrid vehicle engines, two-wheelers, off-road vehicles, and other application designs that require extended air-gap performance.

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Application Note

Fundamental Properties of Speed Sensors

The aim of this application note is to provide a solid foundation for understanding and comparing the fundamental properties of speed sensors that are valid not only for Allegro products but for speed sensors in general.

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Technical Article

Crank Sensor IC for Stop-Start

This article describes start-stop operation and enabling Hall-effect integrated circuits, in particular the Allegro MicroSystems ATS694 and the previous generation ATS658, which are used in this application.

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Application Note

Guidelines for Mapping Speed Sensor Targets

AN296283: This application note describes the various techniques that can be used to map customer targets for speed sensors.

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Application Note

Mechanical Shift of Switch Point

AN296243 - The mechanical shift of switch point is a specification that provides detail necessary to predict the location of an output edge with respect to the integrated circuit (IC) package and the target feature. This application note illustrates how to apply this specification.

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