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Enhanced Automotive Applications With This MEMS Accelerometer

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Features ultra-low power consumption and supports switching between modes on the fly to optimise resolution

The AIS2IH by STMicroelectronics is a three-axis linear accelerometer that enhances resolution, temperature stability and mechanical robustness of non-safety automotive applications including anti-theft, telematics, infotainment, tilt/inclination measurement and vehicle navigation, thus paving the way to new performance-demanding applications in automotive, medical and industrial segments.

The AIS2IH delivers high-performance motion-sensing over a wide operating temperature range of -40 degrees Celsius to +115 degrees Celsius. 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 optimise resolution and power consumption for the exact application requirements at any time.

The new automotive accelerometer has user-selectable full scales of ±2g, ±4g, ±8g, and ±16g, and can measure 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 a 2mm x 2mm LGA package with wettable flanks.




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