MEMS tire pressure sensor offers intelligent features

MEMS tire pressure sensor offers intelligent features

New Products |
By Jean-Pierre Joosting

Combining its proven automotive expertise with its patented glass-silicon-glass MEMS sensor technology, Infineon Technologies AG has launched the XENSIV™ SP49 tire pressure monitoring sensor.

The XENSIV™ SP49 integrates MEMS sensors and an ASIC to provide smart tire features that enable advanced tire pressure monitoring systems (TPMS). It features a powerful 32-bit Arm® M0+ core, a large flash memory and RAM, Low Power Monitoring (LPM), and optimized fast acceleration sensing. The SP49 tire pressur sensor is ideally suited for intelligent tire functions such as on-tire auto-position sensing, tire inflation assistance, tire blowout detection, and load detection.

The SP49 is a pin-to-pin replacement for Infineon’s last generation SP40 TPMS products. With its hardware master/slave I²C interface and software-simulated UART, SPI and PWM interfaces, the SP49 is ideal for sub-1GHz and scalable for BLE TPMS. Available up to ASIL-A requirements, the sensor offers a high level of integration and is optimized to perform all functions required to implement a modern TPMS module. With its integrated microcontroller, sensors and convenient peripherals, the SP49 requires only a few passive components to form a complete TPMS sensor unit. The device is designed for low power consumption, making it ideal for battery-powered applications.

In addition to the ability to generate a wake-up from the integrated interval timer, SP49 products are suitable for stand-alone remote pressure sensing that requires low power consumption. In these applications, the LF receiver with wake-up capability and best-in-class sensitivity enables on-demand measurements.


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