AN2579 Datasheet, PDF (1/15 Pages) STMicroelectronics – LIS302DL 3-axis digital MEMS accelerometer

AN2579
Application note
LIS302DL 3-axis digital MEMS accelerometer
translates finger taps into actions
Introduction
This document is intended to provide application information for the LIS302DL low-voltage
3-axis digital output linear MEMS accelerometer housed in an LGA package.
The LIS302DL is an ultra-compact low-power 3-axis linear accelerometer that includes a
sensing element and an IC interface capable taking information from the sensing element
and providing the measured acceleration data to external applications via an I2C/SPI serial
interface.
The sensing element used to detect acceleration is manufactured using a dedicated process
developed by ST to produce inertial sensors and actuators in silicon.
The IC interface is instead manufactured using a CMOS process that allows a high level of
integration to design a dedicated circuit which is factory trimmed to better match the sensing
element characteristics.
The LIS302DL has a user-selectable full scale of ±2g and ±8g and is capable of measuring
accelerations with an output data rate of 100 Hz or 400 Hz. A self-test capability allows the
user to check that the system is operating correctly.
The device features two independent, highly programmable interrupt sources that can be
configured either to generate an inertial wake-up interrupt signal when a programmable
acceleration threshold is exceeded along one of the three axes, to detect a free-fall or to
recognize single/double click events.
Two independent pins can be configured to provide interrupt signals to connected devices.
The LIS302DL is available in a plastic SMD package and is designed to operate over a
temperature range extending 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 cell phones and PDAs, or any other application where
reduced package size and weight are required.
January 2008
Rev 1
1/15
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