Magnetic sensors based on TMR technology achieve highest functional safety grade

Magnetic sensors based on TMR technology have been launched by Infineon Technologies. This means the company now offers magnetic sensors based on all four magnetic technologies: HALL, GMR, AMR and TMR.

The XENSIV TLE5501 angle sensor family are fast analogue TMR-based angle sensors dedicated to automotive applications. Their fields of use range from steering angle applications with the highest functional safety requirements to motors for wipers, pumps and actuators and electric motors in general. They are also ready to be used in industrial and consumer applications such as robotics or gimbal.

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

A TMR-based sensor can be connected directly to the microcontroller without any further amplification. TMR also shows a low temperature drift which helps reduce external calibration and compensation efforts. In addition, TMR technology has low current consumption, down to 2mA for the XENSIV TLE5501 family.

The new sensor family 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 Infineon TLE5009 but can enable cheaper systems as no additional amplifier is necessary.

The other version, the TLE5501 E0002, offers ISO26262-compliant development, achieving the highest automotive functional safety grade ASIL D level for angle sensors with just one single chip, says Infineon.

It incorporates decoupled bridges for redundant external angle calculation and offers highest diagnostic coverage as demanded by functional safety regulations.

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