Information

BMA280
Data sheet
Page 21
BST-BMA280-DS000-11 | Revision 1.8 | August 2014 Bosch Sensortec
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Note: Specifications within this document are subject to change without notice.
4.5 Offset compensation
Offsets in measured signals can have several causes but they are always unwanted and
disturbing in many cases. Therefore, the BMA280 offers an advanced set of four digital offset
compensation methods which are closely matched to each other. These are slow, fast, and
manual compensation as well as inline calibration.
The compensation is performed with unfiltered data, and is then applied to both, unfiltered and
filtered data. If necessary the result of this computation is saturated to prevent any overflow
errors (the smallest or biggest possible value is set, depending on the sign). However, the
registers used to read and write compensation values have a width of 8 bits.
An overview of the offset compensation principle is given in figure 5:
Figure 5: Principle of offset compensation