The accuracy of 0.1˚ applies across the entire temperature range and product lifecycle. Moreover, at low magnetic flux densities, between 10 millitesla (mT) and 20 mT, where the angle error significantly increases, angle sensors serving automotive and industrial designs must still achieve angle errors as low as 0.2°. Additionally, angle sensors should be easily integrated into safety-critical designs such as electric power steering (EPS) systems, which are crucial for autonomous features like automated parking and lane keeping.
To address ease of use, Infineon’s XENSIV TLE5109 and TLE5014 angle sensors are available in both single and dual die versions, and integrate both the sensing and logic elements on a single chip (Figure 3). Dual die versions are more suitable for ASIL-D safety applications. Figure 3: The side view (left) of a dual die angle sensor (right) for safety-critical applications that uses top-bottom placement to shrink space and save on cost by using an inexpensive ferrite magnet. (Image source: Infineon Technologies)
Meeting functional safety requirements The angle sensors used in automotive applications require a high degree of precision, down to 0.1˚, to help ensure compliance with the ISO 26262 functional safety standard in the face of a highly demanding operating environment. The applications for these sensors include position measurement in brushless DC (BLDC) motors for pumps, wipers, brakes, valves, flaps, pedals, and steering angle.
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