This application note describes the LIS331DLM low-voltage 3-axis digital output linear MEMS accelerometer, housed in an LGA package. The LIS331DLM is a high performance, ultra low-power 3-axis linear accelerometer, which belongs to the nano family of MEMS accelerometers, with digital I2C/SPI serial interface standard output. The device features ultra low-power operational modes, which allow advanced power saving and smart sleep to wake functions. The LIS331DLM has dynamically user-selectable full scales of ±2 g /±4 g /±8 g and is capable of measuring acceleration with output data rates from 0.5 Hz to 400 Hz. The self-test capability allows the user to check the functioning of the sensor in the final application. The device can be configured to generate interrupt signals in response to inertial wakeup/free-fall events or based on the position of the device itself. The thresholds and timing of interrupt generators are programmable by the end user on the fly. The LIS331DLM is available in a small, thin plastic land grid array (LGA) package and is guaranteed to operate over an wide temperature range of -40 °C to +85 °C.