New AMR-based angle sensors from Infineon: best-in class angle accuracy at low magnetic fields

Infineon Technologies has introduced a new family of AMR (anistropic magnetoresistant) angle sensors that is highly accurate at low magnetic fields and can enable designers to use less powerful, cheaper magnets. 

Introduced at 2019 Sensor+Test trade fair in Nuremberg, the Xensiv TLE5109A16 sensors are designed for very precise, fast and yet cost-efficient angle measurement at the highest functional safety levels in automotive and industrial applications. These include position measurement in brushless DC motors for pumps, wipers or brakes, position measurements of valves, flaps or pedals and steering angle measurement. 

The new devices are designed for 180° angle measurement but are also applicable for 360° measurement in motors with an even number of pole pairs. They are suitable for a broad range of magnetic fields, starting at 10 mT reaching up to more than 500 mT. 

Their accuracy at low magnetic fields between 10 and 20 mT, where usually the angle error significantly increases, achieves angle errors as low as 0.2 degrees. This enables cost-efficient system solutions as it allows customers to use less powerful and thus cheaper magnets, says the company. They are suitable for high-speed applications with more than 30,000 rotations per minute.

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