Giant Magnetoresistance (GMR) Technology

As a world leader in developing and manufacturing high-performance integrated circuits, Allegro uses advanced magnetic sensing technology to meet today’s most demanding application requirements. Our giant magnetoresistance (GMR) effect technology is a key part of our portfolio, offering a powerful tool for designers to address new challenges and extend IC capabilities. 

While renowned for its use in high-resolution speed sensing, GMR offers the unique ability to sense in-plane to the IC surface. This enables the creation of novel, robust, and differentially magnetic solutions that are not possible with traditional Hall-effect technology. Allegro is one of very few IC manufacturers who directly integrate GMR technology on top of our semiconductor wafers, an approach that improves reliability and simplifies system design. 

This integrated and versatile platform is now enabling breakthroughs in new markets, from industrial automation to the life sciences.

Documentation & Resources

Application Note

Giant Magnetoresistance versus Hall-effect: A Comparison of Technologies for Speed Sensor Applications

Allegro MicroSystems giant magnetoresistance (GMR) effect technology offerings build on lessons learned from experience with Hall-effect devices to enable new options for speed sensing system design.
Whitepaper

Whitepaper: Allegro ICs Based on Giant Magnetoresistance (GMR)

This whitepaper provides a basic understanding of the giant magnetoresistance (GMR) effect and how Allegro uses this technology in market-leading ICs to meet today’s application requirements.
News

Allegro MicroSystems Announces the Addition of High Accuracy GMR Sensor ICs to Wheel Speed Product Family

Allegro's latest wheel speed sensor product line meets all the industry’s requirements from high accuracy GMR to back biased Hall-effect sensor solutions.

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The BioXMR™ Biosensing Platform​

Allegro is leveraging its leadership in GMR technology to revolutionize biological sensing. Our new BioXMR™ platform is a fully integrated, solid-state biosensor that translates complex biological interactions into precise digital data. This technology enables the rapid, simultaneous measurement of dozens of biomarkers from a single small sample, opening new possibilities in applications from point-of-care diagnostics to life science research. 
Featured Innovation

Watch the video to learn more about our GMR technology: