TLE5009-E2000 Datasheet, PDF (20/32 Pages) Infineon Technologies AG – GMR-Based Angular Sensor

Y
Ymax
X(Ymax)
TLE5009
Specification
Xmin
Y(Xmin)
Sensor-
Zeropoint
X (Ymin )
Ymin
Y(Xmax)
Xmax
X
Figure 10 Min-Max method
Afterwards, amplitude (Equation (9), Equation (10)) and offset (Equation (11), Equation (12)) can be
calculated:
A_X
=
X _max
−
2
X _min
(9)
A_Y
=
Y_max
− Y_min
2
(10)
O_X
=
X _max
+
2
X _min
(11)
O_Y
= ^Ymax
+ Y_min
2
(12)
The corresponding maximum and zero-crossing points of the SIN and COS signals do not occur at the precise
distance of 90°. The difference between X and Y phases is called the orthogonality error (Equation (13)):
ϕ = ϕ_X −ϕ_Y
(13)
Data Sheet
20
Rev. 1.1, 2012-04