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AS5040-ASST View Datasheet(PDF) - austriamicrosystems AG

Part Name
Description
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AS5040-ASST
AMSCO
austriamicrosystems AG AMSCO
AS5040-ASST Datasheet PDF : 61 Pages
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AS5040 − Simulation Modelling
In order to neglect the influence of external disturbing
magnetic fields, a robust differential sampling and ratiometric
calculation algorithm has been implemented. The differential
sampling of the sine and cosine vectors removes any common
mode error due to DC components introduced by the magnetic
source itself or external disturbing magnetic fields. A
ratiometric division of the sine and cosine vectors removes the
need for an accurate absolute magnitude of the magnetic field
and thus accurate Z-axis alignment of the magnetic source.
The recommended differential input range of the magnetic
field strength (B(X1-X2),B(Y1-Y2)) is ±75mT at the surface of the
die. In addition to this range, an additional offset of ±5mT,
caused by unwanted external stray fields is allowed.
The chip will continue to operate, but with degraded output
linearity, if the signal field strength is outside the recommended
range. Too strong magnetic fields will introduce errors due to
saturation effects in the internal preamplifiers. Too weak
magnetic fields will introduce errors due to noise becoming
more dominant.
ams Datasheet
[v2-12] 2017-Jun-20
Page 43
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