SCA8X0/21X0/3100 Series
6.2 Output to Angle Conversion
Product output is function of sin and it can be transferred to angle using the following equation for
conversion:
Output − Offset0g
⎛
⎞
LSB
⎜
⎜
⎟
⎟
α = arcsin
,
Sensitivity
⎝
⎠
Where OutputLSB is output in g, Offset0g is offset at 0 g position and sensitivity is sensitivity of
product. Nominal sensitivity is determined at datasheet of product and 0 g can be used in Offset0g if
not measured after installation. To read output of product refer chapter Output Data Conversion.
Angles close to 0° inclination can be estimated quite accurately with straight line conversion but for
the best possible accuracy, arcsine conversion is recommended to be used. The following table
shows the angle measurement error if straight line conversion is used.
Straight line conversion equation:
Output − Offset0g
⎛
⎞
LSB
⎜
⎜
⎟
⎟
α =
,
Sensitivity
⎝
⎠
Where OutputLSB is output in g, Offset0g is offset at 0 g position and sensitivity is sensitivity of
product.
Tilt angle [°]
Straight line conversion error [°]
0
0
1
2
3
4
0.0027
0.0058
0.0094
0.0140
0.0198
0.0787
0.2185
1.668
5
10
15
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