Magnetic Sensors Based on Four Magnetic Technologies

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The TMR (Tunnel Magnetoresistance) technology offers sensing sensitivity that comes with an output voltage realising output signals of up to 0.37 V/V for all XENSIV TLE5501 products

The magnetic sensors are beneficial in terms of functional safety. Infineon Technologies AG is launching magnetic sensors based on TMR technology. This makes firm sensor manufacturer to offer magnetic sensors based on four magnetic technologies that are HALL effect, GMR ( Giant Magnetoresistance), AMR (Anisotropic Magnetoresistance effect)  and TMR.

Version and Qualification level

The new sensor will be available at two different qualification levels. The TLE5501 E0001 is qualified according to AEC Q100. This version is pin-compatible to the established TLE5009 model but can enable economical systems as no additional amplifier is necessary.

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The other version, the TLE 5501 E0002, offers ISO 26262-compliant development, achieving ASIL D level with one single chip. It incorporates decoupled bridges for redundant external angle calculation and offers diagnostic coverage as demanded by functional safety regulations.

After the launch, the company will achieve the automotive functional safety grade ASIL (Automotive Safety Integrity Level ) D for angle sensors with only one single sensor chip. This product is fast analogue TMR-based angle sensor dedicated to automotive applications.

Use of TMR technology in varied applications

The TMR technology offers a sensing sensitivity that comes with an output voltage realising output signals of up to 0.37 V/V for all XENSIV TLE5501 products.

Its fields of use, range from steering angle applications with the functional safety requirements for wipers, pumps and actuators and electric motors. It is also ready to be used in industrial and consumer applications like robotics or gimbal.

Unlike other technologies, a TMR-based sensor can be connected directly to the microcontroller without any further amplification. TMR shows low-temperature drift reducing external calibration and compensation efforts. Also, It is known for the low current consumption, which is as low as 2 mA for the XENSIV TLE5501 family.

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