Infineon Technologies AG has launched its XENSIV TLE49SR angle sensor family, claiming excellent stray field immunity with high accuracy. The differential Hall-based sensors target safety-critical automotive chassis systems such as electric power steering and vehicle height leveling.
(Source: Infineon Technologies AG)
The XENSIV TLE49SR family measures absolute angular position in the range from 0° to 360° and withstands stray magnetic fields of up to 8 mT. They exceed the requirements of ISO11452-8 level IV for car hybridization and electrification with 4,000 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 of less than 1°. By using a look-up table, the angle error can be reduced even further, Infineon said. For example, multi-point calibration (16 variable and 32 equidistant) results in an angle error below 0.5°. This feature helps to compensate for angle deviations resulting from, as an example, mechanical misalignments of the manufacturing process.
The angle sensors are compliant to ISO 26262 as a “safety element out of context,” meeting ASIL C metric at the device level. They enable system designs up to functional safety level ASIL D. The operating temperature range is -40°C to 125°C. They are RoHS-compliant and halogen-free.
The first products in the XENSIV TLE49SR angle sensor family are available now with either a PWM, SENT or SPC interface. They are supplied in a TDSO-8 package for surface-mounting.
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