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May 2017
DocID028180 Rev 2
1/55
www.st.com
AN4748
Application note
LIS2DS12: always-on 3D accelerometer
Introduction
This document is intended to provide usage information and application hints related to ST’s LIS2DS12
motion sensor.
The LIS2DS12 is a 3D digital accelerometer system-in-package with a digital I
2
C/SPI serial interface
standard output, performing at 150 µA in high-resolution mode and no more than 80 µA in low-power
mode. Thanks to the ultra-low noise performance of the accelerometer, the device combines always-on
low-power features with superior sensing precision for an optimal motion experience for the consumer.
Furthermore, the accelerometer features smart sleep-to-wakeup (activity) and return-to-sleep (inactivity)
functions that allow advanced power saving.
The device has a dynamic user-selectable full-scale acceleration range of ±2/±4/±8/±16 g and is
capable of measuring accelerations with output data rates from 1 Hz to 6400 Hz. The LIS2DS12 can be
configured to generate interrupt signals by using hardware recognition of free-fall events, 6D orientation,
tap and double-tap sensing, activity or inactivity, and wake-up events.
The LIS2DS12 can be configured to work as a sensor hub.
The LIS2DS12 is compatible with the requirements of the leading OSs, offering real and virtual sensors.
It has been designed to implement in hardware significant motion, tilt, and pedometer functions.
The LIS2DS12 has an integrated 256-level first-in, first-out (FIFO) buffer allowing the user to store data
in order to limit intervention by the host processor.
The LIS2DS12 is available in a small thin plastic land grid array package (LGA) and it is guaranteed to
operate over an extended temperature range from -40 °C to +85 °C.
The ultra-small size and weight of the SMD package make it an ideal choice for handheld portable
applications such as smartphones, IoT connected devices, and wearables or any other application
where reduced package size and weight are required.
