LSM303AGR datasheet(28/68 Pages) STMICROELECTRONICS

Part #	LSM303AGR

Description	Ultra-compact high-performance eCompass module: ultra-low-power 3D accelerometer and 3D magnetometer

PDF	68 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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28 / 68 page

Functionality

LSM303AGR

28/68

DocID027765 Rev 5

4.2.4

Accelerometer self-test

The self-test allows the user to check the sensor functionality without moving it. When the

self-test is enabled, an actuation force is applied to the sensor, simulating a definite input

acceleration. In this case the sensor outputs will exhibit a change in their DC levels which

are related to the selected full scale through the device sensitivity. When the self-test is

activated, the device output level is given by the algebraic sum of the signals produced by

the acceleration acting on the sensor and by the electrostatic test-force. If the output signals

change within the amplitude specified inside Table 3, then the sensor is working properly

and the parameters of the interface chip are within the defined specifications.

The self-test procedure is described in the following figure.

LSM303AGR Datasheet(PDF) 28 Page - STMicroelectronics