AS5040-ASST View Datasheet(PDF) - austriamicrosystems AG
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Description
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AS5040-ASST Datasheet PDF : 61 Pages
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AS5040 − Angular Output Tolerances
Angular Output Tolerances
Accuracy
Accuracy is defined as the error between measured angle and
actual angle. It is influenced by several factors:
• The non-linearity of the analog-digital converters,
• Internal gain and mismatch errors,
• Non-linearity due to misalignment of the magnet
As a sum of all these errors, the accuracy with centered
magnet = (Errmax – Errmin)/2 is specified as better than ±0.5
degrees @ 25°C (see Figure 45).
Misalignment of the magnet further reduces the accuracy.
Figure 44 shows an example of a 3D-graph displaying
nonlinearity over XY-misalignment. The center of the square
XY-area corresponds to a centered magnet (see dot in the center
of the graph). The X- and Y- axis extends to a misalignment of
±1mm in both directions. The total misalignment area of the
graph covers a square of 2x2 mm (79x79mil) with a step size of
100μm.
For each misalignment step, the measurement as shown in
Figure 45 is repeated and the accuracy (Errmax – Errmin)/2 (e.g.
0.25° in Figure 45) is entered as the Z-axis in the 3D-graph.
Figure 44:
Example of Linearity Error Over XY Misalignment
ams Datasheet
[v2-12] 2017-Jun-20
Page 45
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