Infineon imbues tyre pressure sensor with intelligent features
Infineon Technologies’ automotive design expertise has been combined with its patented glass-silicon-glass MEMS sensor technology, resulting in the Xensiv SP49 tyre pressure monitoring sensor.
The sensor integrates MEMS sensors and ASICs and provides features to enable advanced pressure monitoring systems. There is a powerful 32-bit Arm M0+ core, a large flash memory and RAM, low power monitoring (LPM) and optimised fast acceleration sensing. The SP49 is suitable for intelligent tyre functions such as on-tyre auto-position sensing, tyre inflation assistance, tyre blowout detection and load detection.
The SP49 is a pin-to-pin replacement for Infineon’s SP40 TPMS (tyre pressure monitoring system) products. It has a hardware master/slave I²C interface and software-simulated UART, SPI and PWM interfaces, making it suitable for sub-1GHz use and scalable for Bluetooth Low Energy TPMS. It is available at ASIL-A, and the level of integration means only a few passive components are required to form a complete TPMS sensor unit, advised Infineon. It is also designed for low power consumption, making it suitable for battery-powered applications.
It is able to generate a wake-up from the integrated interval timer, making it suitable for standalone remote pressure sensing where the LF receiver with wake-up capability and best-in-class sensitivity enables on-demand measurements, said Infineon.
The Xensiv tyre pressure sensor is available for order now.
