Posted on March 13, 2017 at 01:49
All the sensitivity values for the acceleration fit within 16 bits, however �16 g does not.
Let�s use FS �2 g as an example sensitivity level. As the range is -2 to +2, this would be a total of 4g. Or 4,000 Milli-Gs.
The output is 16 bits. 16 bits equals 65,535. This means we can get 65,535 different readings for the range between -2 and +2. (or -2,000 MilliGs and +2,000 MilliGs)4,000 MilliGs / 65,535 = 0.061
0.061 is what is seen in the datasheet for
�2
here are the values for all sensitivity levels;
�2 =
4,000 MilliGs / 65,535 = 0.061
�4 =
8
,000 MilliGs / 65,535 = 0.122
�6 =
12
,000 MilliGs / 65,535 = 0.183
�8 =
16
,000 MilliGs / 65,535 = 0.244
�16 =
32
,000 MilliGs / 65,535 =
0.488
The only one that doesn't match up with the datasheets for both LSM9DS0 and LSM9DS1 is for
�16. The calculations above show 0.488, but the datasheets have 0.732
Can someone please explain why this is so?
#lsm9ds1 #accelerometer #lsm9ds0
