Magnetic Angle Sensors with Outstanding Stray Field Robustness Optimized for Automotive Applications

Published  May 16, 2024   0
L Lakshita
XENSIV TLE49SR Angle Sensor Family

Infineon Technologies has introduced the new XENSIV TLE49SR angle sensor family, which combines excellent stray field immunity with high accuracy. These sensors are ideal for applications of safety-critical automotive chassis systems such as electric power steering and vehicle height leveling. All products in the XENSIV TLE49SR family withstand stray magnetic fields of up to 8 mT. The sensors exceed the requirements of ISO11452-8 level IV for car hybridization and electrification with 4000 A/m (equal to 5 mT) for inhomogeneous stray field and eliminate the need for external shielding.

The intrinsic accuracy of the sensors defines an angle error with less than 1°. By using a look-up table, the angle error can be reduced even further: Multi point calibration (16 variable and 32 equidistant) results in an angle error below 0.5°. This feature helps to compensate angle deviations resulting e.g. from mechanical misalignments of the manufacturing process. The angle sensors were developed according to ISO 26262 as a “safety element out of context”. The ASIL C metric on component level enables system designs up to functional safety level ASIL D.

Key Features

  • Withstands mag. strayfield up to 8mT

  • Angle error<1°, with look up table<0.5°

  • Enables  ASIL D compliant systems

  • Very low jitter delay ±1µs

  • Configurable  9.8µs ~ 26ms

  • Compensates  package stress

  • Follows zero defect quality policy