A1.1 - Monolithic Digital Magnetic Hall Sensor with two Measurement Paths for an ASIL D Application
- AMA Conferences 2017
2017-05-30 - 2017-06-01
- Proceedings Sensor 2017
- A1 - Magnetic Sensors
- F. Rasbornig, W. Granig - Infineon Technologies Austria AG, Villach (Austria), J. Cunha - Infineon Technologies AG, Neubiberg (Germany)
- 27 - 31
Since the ISO26262 standard  was introduced in 2011 in the automotive industry the requirements regarding functional safety are significantly increased, especially for semiconductor products. An increased amount of semiconductor devices are used in safety-critical applications even with the highest ASIL rating (ASIL D) by usage of homogenous redundancy of two separated products or two silicon dies within one chip-package  .
In this paper a new product concept will be presented for an integrated linear Hall sensor fulfilling the highest ASIL rating. The basic concept is to implement two redundant and diverse measurement paths on one monolithic silicon die to achieve the functional safety requirements and the safety concept for ASIL D requirements. Also the evaluation results based on laboratory measurements of the sensor product on silicon level will be shown.
An overview of the main automotive applications will be presented, where this product will be used. The main application for this product is the electronic power steering (EPS) application, where the torque is measured via the magnetic field size and via a certain magnetic setup transferring this torque into a magnetic field size and further converted to the corresponding digital output values of the linear Hall sensor.