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TLE5014
GMR-Based Angle Sensor
Examples
The formula for calculating the look-up (LUT) correction values is as follows:
[
LUT LSB 16
With:
•
LUT[LSB
]: Calculated 16-bit value which has to be stored in the corresponding address of the LUT
16
•
POSITION[LSB
]: angular position (0°,11.25°, 22.5°, ..., 348.75°) as 16-bit value
16
•
readout [LSB
]: Sensor readout at this position as a 12-bit value
12
In case the calculated value is negative or ≥ 2
0, ... 65535.
The reference positions for the calculation of the look-up values are 0°, 11.25°, 22.5°, ... , 348.75°.
In
Table 18
some examples are given for calculation of the look-up table (LUT) correction values.
Table 18
Examples for Look-up Calculation
Position
Position
[°]
[LSB16]
0
0
0
0
11.25
2048
22.50
4096
348.75
63488
In case the sensor is configured to SENT interface with the option of "4091" as error code in the data range, the
calculation has to be modified as in this case not the complete 12 bit are available for sensor output. The angle
values have to be scaled differently to 16 bit in this case. The data range in this case is 1... 4088 LSB. The
notation used is [LSB'12] in contrast to [LSB12], which means the full 12-bit resolution (0... 4095).
[
]
LUT LSB 16
=
Table 19
Examples for Look-up Calculation in case SENT option "4091" enabled
Position
Position
[°]
[LSB16]
0
0
0
0
11.25
2048
22.50
4096
348.75
63488
User's Manual
]
⋅
=
2 POSITION LSB 16
16
(= 65536), add/substract 2
Sensor out
[LSB12]
4
4093
130
250
3960
⋅
[
2 POSITION LSB 16
Sensor out
[LSB'12]
4
4088
130
250
3960
[
]
(
⋅
–
16 readout LSB 12
16
so that the result is in the range of
Sensor out
Sensor out
[°]
[LSB16]
0.352
64
359.736
65488
11.426
2080
21.973
4000
348.047
63360
16
æ
2
]
----------- -
⋅
(
ç
–
readout LSB' 12
4088
è
Sensor out
Sensor out
[°]
[LSB16]
0.264
48
359.912
65520
11.360
2068
21.927
3992
348.64
63468
47
(9.7)
[
]
)
LUT value
[LSB16]
65472
48
2016
4192
63616
(9.8)
ö
[
] 1
)
÷
–
ø
LUT value
[LSB16]
65488
16
2028
4200
63508
Rev. 1.0
2019-03-12
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