STMicroelectronics touts the AIS2IH three-axis linear accelerometer brings enhanced resolution, temperature stability, and mechanical robustness to non-safety automotive applications. These applications include anti-theft, telematics, infotainment, tilt/inclination measurement, and vehicle navigation. Together with the enhanced performance, the MEMS accelerometer offers an extended temperature range, which also makes the device suited for emerging automotive applications such as digital drive recorders, driver monitoring, vertical level sensing in vehicle suspension, and door automation.
The AEC-Q100-qualified sensor is also suited to industrial IoT (IIoT) applications such as 5G smart antennas as well as sensitive medical applications like pacemakers, which need the same requirements as automotive, including ultra-low-power consumption, compact size, high resolution, and high reliability. (ST introduced its first AEC-Q100-qualified three-axis MEMS accelerometer for automotive and industrial applications in 2008.)
The accelerometer features five different operating modes, including one high-performance mode (HPM) and four low-power modes (LPM). The device can switch between modes on the fly to optimize resolution and power consumption for the exact application requirements at any time, said ST. 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.
Available in an LGA-12 land grid array (LGA) package, the AIS2IH offers power consumption down to 110 µA in high-performance mode and 0.67 µA @ 1.6 Hz in low-power mode. In addition, it offers motion sensing over a wide operating temperature range of -40°C to 115°C and 10,000 g high-shock survivability.
The new automotive accelerometer features 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 1.6 Hz to 1.6 kHz, with embedded configurable digital low-pass and high-pass filters. The embedded 32-level FIFO and the motion- and activity-detection functions contribute to keeping the system-level power consumption within a tight budget, said ST.
The AIS2IH is sampling now in a 2 × 2 mm LGA package with wettable flanks. Pricing starts at $1.50 for orders of 1,000 pieces.
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