TLE4998P3 Datasheet, PDF (18/34 Pages) Infineon Technologies AG – Programmable Linear Hall Sensor

TLE4998P
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 9
Gain
Parameter
Symbol Limit Values Unit
min. max.
Register size
G
15
bit
Gain range
Gain - 4.0 3.9998 -
Gain quantization steps ∆Gain
244.14
ppm
Notes
Unsigned integer value
1)2)
Corresponds to 1 / 4096
1) _{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
2) _{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----⁾
4096
6.3
Offset Setting
The offset value corresponds to an output value with zero field at the sensor.
Table 10 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
The offset value can be calculated by:
DY_OS
=
(_{---O-----S----–-----1---6---3---8---4----})
4096
×
100
Data Sheet
18
V 1.0, 2008-07