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ST Unveils Next-Generation MEMS Accelerometer


The AIS2IH 3-axis acceleromter offers enhanced resolution, temeprature stability and mechanical robustness


STMicroelectronics has released the AIS2IH three-axis linear accelerometer. The AIS2IH MEMS 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 opens the way to new performance-demanding applications in automotive, medical, and industrial segments.

Click for Larger Image - ST Unveils Next-Generation MEMS Accelerometer ST's AIS2IH ensures market-leading reliability while delivering high-performance motion sensing over a wide -40°C to +115°C operating temperature range. Moreover, the accelerometer features ultra-low power consumption in a compact LGA-12 land grid array package.

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.

Features of the AIS2IH MEMS digital output motion sensor include

  • AEC-Q100 qualified
  • ±2g/±4g/±8g/±16g dynamically selectable full scales
  • Low power consumption down to 110 µA in high-performance mode and 0.67 µA @ 1.6 Hz in low-power mode
  • Very low noise: down to 90 µg/√(Hz) in high-performance mode
  • Multiple operating modes with multiple bandwidths and resolution
  • Single data conversion on demand
  • High-speed I²C/SPI digital output interface
  • 32-level FIFO
  • 2 independent programmable interrupts
  • Extended temperature range: -40 °C to 115 °C
  • Supply voltage, 1.62 V to 3.6 V
  • Independent IO supply
  • Embedded temperature sensor
  • Self-test
  • 10000 g high shock survivability
  • ECOPACK, RoHS and "Green" compliant

More information on the AIS2IH MEMS digital output motion sensor is available on the ST Web site at AIS2IH MEMS 3-axis accelerometer product page.


The company's Web site address is www.st.com.
[Reprinted with kind permission from STMicroelectronics - Release Date, 26th April, 2021]