TLE5011_11 Datasheet, PDF (20/45 Pages) Infineon Technologies AG – GMR Angle Sensor

TLE5011
Specification
O_X
=
O_X25
+
K_----T_----O---X--
S_T
×
(T
–
T₂₅ )
O_Y
=
O_Y25
+
K_----T_----O---Y--
S_T
×
(T
–
T₂₅ )
O_{X25 ,} O_Y25 : Offset value at 25°C in digits
T₂₅ : Temperature value at 25°C in digits
T : Temperature value in digits
S_T : Sensitivity of the temperature measurement path, (see “Temperature Measurement” on Page 38).
Offset Correction
After the X and Y values are read out, the temperature-corrected offset value must be subtracted.
X₁ = X – O_X
Y₁ = Y – O_Y
Amplitude Normalization
Next, 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 thefollowing equation, in which only the Y
channel must be corrected.
Y₃
=
Y_----2----–_----X_----2---×_{------s--i--n---}(_---–_---ϕ_----)
cos (–ϕ)
Resulting Angle
After correction of all errors, the resulting angle can be calculated using the arctan function¹⁾.
α
=
a
r
c
tan
⎛
⎝
X-Y----^{32-⎠⎞}
– ϕ_X
1) Microcontroller function “arctan2(Y₃,X₂)” to resolve 360°
Final Data Sheet
20
V2.0, 2011-03