At the Sensors Conference & Expo, Infineon Technologies revealed three new sensor products for automotive safety applications. The new sensor products expand the company's portfolio in these automotive safety segments: tyre pressure monitoring systems (TPMS), rollover sensing, and anti-lock brake systems (ABS).
Two of the new products are micro-electro-mechanical systems (MEMS) based on the technology of SensoNor, the provider of tyre pressure and inertia sensors that Infineon acquired in 2003. They are the SP30, a second-generation tyre pressure sensing device with three sensing functions; and the SAR10 Rollover Sensor with an angular rate sensor. The third new sensor is the TLE4941-1C, part of Infineon's third-generation Hall Effect sensor family optimised for ABS applications.
The SP30 family for TPMS applications combines a silicon micromachined pressure and acceleration sensor, temperature sensor, and a battery voltage monitor in a small-footprint package that occupies 104,5 mm2.
The SAR10 Rollover Sensor contains a silicon micromachined angular rate sensor that detects when a vehicle is beginning to roll over and enables the firing of side airbags and pre-tensioning seatbelts. The sensor package, measuring just 120 mm2, includes a signal conditioning chip that handles all analog signal processing and A/D conversion, allowing easy integration into modules as part of the overall vehicle safety system.
Combining a differential Hall sensor and all signal conditioning on a single-chip, the TLE4941-C has enhanced electrostatic discharge robustness. Its self-calibration capability acts at start-up and periodically during vehicle operation to adjust signal quality and ensure the highest accuracy readings at all times.
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