LSM303AH Datasheet, PDF (31/82 Pages) –

LSM303AH
Functionality
4.2.5
Accelerometer data stabilization time vs. ODR setting
The data stabilization time required when an ODR change is applied in order to have valid
usable data depends on the ODR selected and accelerometer setting.
The table below provides the number of samples to be discarded in order to obtain valid
usable data for the accelerometer.
Table 17. Number of samples to be discarded
ODR [Hz]
HF
HR
LP
6400
6
-
-
3200
2
-
-
1600
1
-
-
800
-
400
-
200
-
1
0
1
0
1
0
100
-
1
0
50
-
0
0
25
-
12.5
-
0
0
0
0
1
-
-
0
4.2.6
Accelerometer anti-aliasing filter
The anti-aliasing filter reveals a robustness against external signal disturbance, maintaining
the best accelerometer signal integrity.
The anti-aliasing bandwidth has a bandwidth of ODR/2 in high-resolution (HR) and high-
frequency (HF) modes. Refer to Table 15 for additional details on filtering.
4.3
IC interface
The complete measurement chain is composed of a low-noise capacitive amplifier which
converts the capacitive unbalancing of the MEMS sensor into an analog voltage using an
analog-to-digital converter.
The acceleration and magnetic data may be accessed through an I²C/SPI interface, thus
making the device particularly suitable for direct interfacing with a microcontroller.
The LSM303AH features a data-ready signal which indicates when new sets of measured
acceleration and magnetic data are available, thus simplifying data synchronization in the
digital system that uses the device.
DocID027766 Rev 6
31/82
82