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AS5040 View Datasheet(PDF) - austriamicrosystems AG

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AS5040 Datasheet PDF : 61 Pages
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AS5040 − Incremental Outputs
Incremental Output Hysteresis
To avoid flickering incremental outputs at a stationary magnet
position, a hysteresis is introduced.
In case of a rotational direction change, the incremental
outputs have a hysteresis of 2 LSB.
Regardless of the programmed incremental resolution, the
hysteresis of 2 LSB always corresponds to the highest resolution
of 10 bit. In absolute terms, the hysteresis is set to 0.704 degrees
for all resolutions.
For constant rotational directions, every magnet position
change is indicated at the incremental outputs (see Figure 27).
If for example the magnet turns clockwise from position “x+3“
to “x+4“, the incremental output would also indicate this
position accordingly.
A change of the magnet’s rotational direction back to position
“x+3“ means, that the incremental output still remains
unchanged for the duration of 2 LSB, until position “x+2“ is
reached. Following this direction, the incremental outputs will
again be updated with every change of the magnet position.
Figure 27:
Hysteresis Window for Incremental Outputs
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Clockwise Direction
Counterclockwise Direction
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ams Datasheet
[v2-12] 2017-Jun-20
Page 25
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