TLE5010 Datasheet, PDF (21/56 Pages) Infineon Technologies AG – GMR Based Angular Sensor

TLE5010
Draft
Electrical and Magnetic Parameters
Offset Correction
After read-out of the X and Y value first the temperature corrected offset value has to be
subtracted.
X₁ = X – O_X
Y₁ = Y – O_Y
Amplitude Normalization
Then the X and Y values are normalized using the peak values determined in the
calibration.
X₂
=
-^X----¹-
A_X
Y₂
=
-^Y---¹--
A_Y
Non-Orthogonality Correction
The influence of the non-orthogonality can be compensated using following equation.
Only the Y channel has to be corrected.
Y₃ = ^{Y----2---–-----X}_c---o-^2--s-×--₍^--–-s--_ϕ^-i-n--₎^{--(--–----ϕ----)}
Resulting Angle
After correction of all errors, the resulting angle can be calculated using the arctan
function¹⁾.
α
=
a
rc
tan


YX-----_{32-}
– ϕ_X
1) _{µC-function “arctan2(Y3,X2)” to resolve 360°}
Preliminary Data Sheet
21
V 0.9, 2007-05