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June 2017
DocID030717 Rev 1
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www.st.com
AN5040
Application note
LSM6DSL: always-on 3D accelerometer and 3D gyroscope
Introduction
This document is intended to provide usage information and application hints related to ST’s LSM6DSL
iNEMO inertial module.
The LSM6DSL is a 3D digital accelerometer and 3D digital gyroscope system-in-package with a digital
I
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C/SPI serial interface standard output, performing at 0.4 mA in combo Normal mode and 0.65 mA in
combo High-Performance mode. Thanks to the ultra-low noise performance of both the gyroscope and
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-wake-up (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 an
angular rate range of ±125/±245/±500/±1000/±2000 dps.
The LSM6DSL 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 availability of a dedicated connection mode to external sensors allows the implementation of the
sensor hub functionality.
The LSM6DSL is compatible with the requirements of the leading OSs, offering real, virtual and batch-
mode sensors. It has been designed to implement in hardware significant motion, relative tilt, absolute
wrist tilt, pedometer functions, timestamp and to support the data acquisition of an external
magnetometer with ironing correction (hard, soft).
The LSM6DSL has an integrated smart first-in first-out (FIFO) buffer of up to 4 Kbyte size, allowing
dynamic batching of significant data (i.e. external sensors, step counter, timestamp and temperature).
The LSM6DSL is available in a small plastic land grid array package (LGA-14L) 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.
