STMicroelectronics AIS2IH MEMS accelerometer

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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 performance-demanding applications in automotive, medical and industrial segments.

The product delivers high-performance motion sensing over a wide -40 to +115°C operating temperature range. It features ultralow 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 optimise resolution and power consumption for the exact application requirements at any time.

The product is able 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 ultralow power consumption, compact size, high resolution and ongoing operation.

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

For more information: www.st.com/mems.