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Allegro has pioneered several major advances in the field of Hall-effect sensor ICs, including chopper stabilization, vertical Hall-effect technology, circular vertical Hall (CVH) arrays, and non-intrusive high-speed hardware diagnostics. We are also one of very few IC manufacturers that directly integrate GMR technology on top of our semiconductor wafers—improving reliability and simplifying design.
Our new cutting-edge tunneling magnetoresistance (TMR) effect technology combined with the company’s vertical Hall technology (VHT) offers designers superior heterogeneous redundant sensor solutions that deliver industry-leading accuracy for advanced levels of automation in the automotive and robotic industries.
GMR offers the ability to improve signal to noise, increase resolution, or reduce the required field level for a given solution (smaller magnets, larger air gaps, etc.). Additionally, sensing in-plane to the wafer or IC surface gives the ability to create new, more robust, differentially magnetic solutions than possible with through-plane sensitive Hall technology.
Designed for advanced driver assistance systems (ADAS) applications, the innovative TMR technology offers improved resolution and accuracy, providing up to eight times greater sensitivity than the GMR equivalents. Measured against traditional Hall-effect sensors, the improvement in resolution is even more pronounced.
Allegro’s groundbreaking XtremeSense™ TMR-based solutions are developed in close collaboration with key market-leading customers and are redefining the future of sensing technologies for safety-critical systems and the autonomous vehicles of tomorrow.
The effect of a magnetic field on the current through a conductor (the "Hall effect") was first discovered in 1879. Today, Allegro leverages this fundamental property of physics, along with modern semiconductor technology, to build speed, position, linear, angle, and current sensors. Our Hall-effect sensor integrated circuits (ICs) incorporate a Hall element with other circuitry, such as op-amps and comparators, to make digital position sensors and speed sensors, as well as linear and angle sensors with analog outputs.
Allegro has leveraged years of experience to develop a unique technology enabling high-performance gate drivers. In one single package and across one single internal isolation boundary both the gate drive signal and the drive power are transferred.