TLE4998P3CE1200 Datasheet, PDF (18/32 Pages) Infineon Technologies AG – Programmable Linear Hall Sensor

TLE4998P3C E1200
Signal Processing
6.2
Gain Setting
The sensitivity is defined by the range and the gain setting. The output of the A/D
converter is multiplied by the Gain value.
Table 8
Gain
Parameter
Symbol Limit Values Unit
min. max.
Register size
G
mG¹⁾
15
bit
2
bit
Gain range
Gain - 32 31.998 -
244.14
Gain quantization steps ∆Gain
488.28
ppm
976.56
1953.12
Notes
Unsigned integer value
Unsigned integer value
2)3)
for mG=0
for mG=1
for mG=2
for mG=3
1) _{The register mG is used as digital multiplicator. Relevant sensor characteristics will change in accordant ratio}
at the output.
2) _{For Gain values between - 0.5 and + 0.5, the numerical accuracy decreases. To obtain a flatter output curve,}
a higher range setting should be selected
3) _{A Gain value of +1.0 corresponds to typical 0.8%/mT sensitivity (100 mT range, not guaranteed). It is crucial}
to do a final calibration of each IC within the application using the Gain/DY_OS value
The Gain value can be calculated by
:
Gain = ⁽---G------–----1---6---3---8---4----⁾ ⋅ 2^mG
4096
6.3
Offset Setting
The offset value corresponds to an output value with zero field at the sensor.
Table 9
Offset
Parameter
Symbol Limit Values Unit Notes
min. max.
Register size
OS
15
bit Unsigned integer value
Offset range
DY_OS -400 399
%
Virtual DY_PWM ¹⁾
Offset quantization steps ∆DY_OS
0.024
% 100% / 4096
1) _{Infineon pre-calibrates the samples at zero field to 50% duty cycle (100 mT range), but does not guarantee}
the value. Therefore it is crucial to do a final calibration of each IC within the application
Data Sheet
18
Rev 1.1, 2009-09