Ultra-low power three-axis accelerometer for industrial and battery-powered applications

The STMicroelectronics IIS2DLPC offers four low-power modes which can be selected on-the-fly to adapt the accelerometer’s operation to the requirements of the application.

The STMicroelectronics IIS2DLPC is a three-axis linear accelerometer which offers ultra-low power consumption in both quiescent and active operation. 

The sensor has selectable full scales of ±2 g/±4 g/±8 g/±16 g, and measures acceleration in three axes at output data rates from 1.6 Hz to 1.6 kHz. This makes it suitable for applications requiring functions such as vibration monitoring, tilt or inclination measurement, smart power saving or motion activation, or impact detection and logging. 

Low power consumption means that the IIS2DLPC can be deployed in battery-powered devices such as portable medical equipment or hearing aids. Operating from a supply-voltage range of 1.62 V to 3.6 V, the sensor draws just 50 nA in power-down mode, less than 1 μA in active low-power mode, and 120 μA in high-performance mode. These modes can be changed on-the-fly, enabling the sensor to adapt to the requirements of the application.

Intelligent features of the IIS2DLPC reduce the application’s requirement to call on the host processor. An internal engine processes motion and acceleration data to provide a range of built-in functions including free-fall and wake-up detection, highly configurable single-/double-tap recognition, activity/inactivity detection, stationary/motion detection, portrait/landscape detection and 6D/4D orientation.

An embedded self-test capability allows the designer to check the functioning of the sensor in the final application.