Magnetic Speed Sensors

Allegro offers a comprehensive portfolio of speed sensors, covering the full range of speed and speed with direction, two- and three-wire interface, magnetic encoder (also known as ring magnet) and gear tooth sensing, Hall and GMR technology, and ASIL compliance options for transmission, wheel speed, engine, e-motor, and many more encoder and gear tooth sensing applications.

The innovative Allegro Hall effect and GMR technology provides the most robust and reliable gear tooth and ring magnet speed sensing in the world.

Thanks to decades of application and algorithm experience and close collaboration with OEMs, Allegro develops application-specific speed sensor ICs that are optimized for customers’ target applications, improving safety, reliability, and performance.

Features

• Front and back-biased solutions for magnetic encoder or ferrous target sensing
• Two- and three-wire output protocols supporting speed, direction, and ASIL error reporting (optional)
• Integrated solutions include IC, magnet (optional), and EMC protection component(s) in a single overmolded miniature package
• Differential sensing offers inherent common-mode stray field immunity
• Low jitter for high edge accuracy
• Flexible orientation GMR technology for xMR or Hall replacement and application installation flexibility
• EEPROM enables factory traceability throughout the production process