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STMicroelectronics Unveils Next-Gen MEMS Accelerometer for High-Performance Automotive Applications

Published: May 20,2021

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The STMicroelectronics AIS2IH three-axis linear accelerometer brings enhanced resolution, temperature stability, and mechanical robustness to non-safety automotive applications including anti-theft, telematics, infotainment, tilt/inclination measurement, and vehicle navigation. It also paves the way to new performance-demanding applications in automotive, medical, and industrial segments.

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Leveraging ST’s leading positions in both MEMS and automotive technologies, the AIS2IH ensures market-leading reliability while delivering high-performance motion sensing over a wide -40ºC to +115ºC operating temperature range. Moreover, the accelerometer features ultra-low power consumption in a compact LGA-12 land grid array package, at an ultra-competitive price.

With five different operating modes, including one high-performance mode (HPM) and four low-power modes (LPM), the device supports switching between modes on the fly to optimize resolution and power consumption for the exact application requirements at any time.

Together, the extended operating-temperature range with enhanced performance and cost-effectiveness enable the AIS2IH to address emerging automotive applications such as digital drive recorders, driver monitoring, vertical level sensing in vehicle suspension, and door automation. The sensor is also suited to industrial IoT (IIoT) applications such as 5G smart antennas as well as sensitive medical applications like pacemakers, which require ultra-low power consumption, compact size, and high resolution at uncompromised reliability.

ST’s new automotive accelerometer has user-selectable full scales of ±2g, ±4g, ±8g, and ±16g, and is capable of measuring accelerations with output data rates (ODR) configurable in the range from 1.6Hz to 1.6kHz, with embedded configurable digital low-pass and high-pass filters. Typical noise density is 90µg/√Hz when operating in high-performance mode. The operating current at 3V is 110μA in HPM and 0.67μA in LPM at 1.6Hz. The embedded 32-level FIFO and the motion- and activity-detection functions contribute to keeping the system-level power consumption within a tight budget.

The AEC-Q100 qualified AIS2IH is sampling now in 2mm x 2mm LGA package with wettable flanks.

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