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Clamping high voltage:
CH
----------- -
×
V
V
=
CLH
DD
4096
4.7
Temperature Compensation - TL, TQ & TT
The TLE4997 has an integrated third-order temperature compensation using the coefficients TL, TQ, and TT,
which is used to compensate the thermal drift of the Hall cell (pre-configured by Infineon).
The magnetic field strength of a magnet depends on the temperature. This material constant is specific for the
different magnet types. The temperature compensation parameters TL and TQ of the TLE4997 can be adapted to
compensate this temperature dependency of the magnet in the application. The TT value is fixed and cannot be
modified.
Three parameters are used for the application temperature compensation:
•
Reference temperature T
st
•
A linear part (1
order) TC
nd
•
A quadratic part (2
The detailed procedure to derive the optimum TL and TQ parameters for a a given magnet characteristic is
described in
Chapter
5.
Table 4-7
Temperature Compensation
Parameter
st
1
order coefficient TC
1
Quantization steps of TC
nd
2
order coefficient TC
Quantization steps of TC
Reference temp.
1) Relative range to Infineon TC
and depends on specific pre-calibrated TL setting, full adjustable range: -2441 to +5355 ppm/°C.
2) Relative range to Infineon TC
and depends on specific pre-calibrated TQ setting, full adjustable range: -15 to +15 ppm/°C
User's Manual
0
1
order) TC
2
Symbol
Min.
TC
-1000 –
1
ΔTC
–
1
1
TC
-6
2
2
ΔTC
–
2
2
T
-48
0
temperature pre-calibration, the maximum adjustable range is limited by the register-size
1
temperature pre-calibration, the maximum adjustable range is limited by the register-size
2
Configuration & Calibration Parameters
Values
Unit
Typ.
Max.
3000
ppm/ °C
15.26
–
ppm/ °C
–
6
ppm/ °C²
0.119
–
ppm/ °C² –
–
64
°C
24
TLE4997
User's Manual
Note / Test Condition
1)
–
2)
–
2
.
v01_01, 2019-08
(4.4)
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