MLX91204 Datasheet, PDF (6/11 Pages) Melexis Microelectronic Systems – 360 Degrees Hi-Speed Rotary Position Sensor

MLX91204
360 Degrees Hi-Speed Rotary Position Sensor
(Sine/Cosine)
From the previous table and the ageing data, the intrinsic angular linearity error (in Degree)
can be derived from the individual contributions as it follows:
Test Conditions
Parameters
Room Temperature
(TA = 25 Deg.C.)
Offset
Sensitivity Mismatch
Phase Mismatch
Total
Temperature Range
(TA = -40 … 125 Deg.C.)
Offset
Sensitivity Mismatch
Phase Mismatch
Total
Lifetime/Ageing
(HTOL 1000 hours – 5.0 V –
150 Deg.C.)
Offset
Sensitivity Mismatch
Phase Mismatch
Total
Overall Linearity Error
Excl. Ageing
Incl. Ageing
Output Swing
±1V ±2V
± 0.8
± 0.4
± 0.84
± 0.84
±1
±1
± 2.64 ± 2.24
Unit
Degree
Degree
Degree
Degree
± 0.8
± 0.34
± 0.12
± 1.26
± 0.4
± 0.34
± 0.12
± 0.86
Degree
Degree
Degree
Degree
± 0.8
± 0.1
± 0.1
± 1.00
± 0.4
± 0.1
± 0.1
± 0.60
Degree
Degree
Degree
Degree
± 3.90
± 4.90
± 3.10
± 3.70
Degree
Degree
The intrinsic linearity error refers only to the linearity error associated to the MLX91204. The
linearity error associated to the magnetic and mechanical (off-axis, excentricity) design is not
included and should be considered as an additional contribution.
For more information, please refer to the application note:
http://www.melexis.com/Assets/Magnet_Application_Note_MLX90316_5221.aspx
The total error can be reduced either statically (room temperature compensation) or
dynamically (continuous compensation) through the off-chip signal processing performing the
angular computation i.e. arctan(Y_OUT/X_OUT). The compensation is applied prior to computing
the arctangent function: offset, gain and phase correction can be applied.
For more information, please refer to the application note:
http://www.melexis.com/Assets/Front-End_Calibration_of_MLX90316_5252.aspx
3901091204
Rev 003
Page 6 of 11
Data Sheet
16/Jan/12