TLE4998S3C Datasheet, PDF (18/36 Pages) Infineon Technologies AG – Programmable Linear Hall Sensor

TLE4998S3C
Signal Processing
6.2
Gain Setting
The overall sensitivity is defined by the range and the gain setting. The output of the ADC
is multiplied with the Gain value.
Table 8
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, it is advisable to select a higher range setting
2) _{A gain value of +1.0 corresponds to typical 32 LSB12/mT sensitivity (100 mT range, not guaranteed). It is}
crucial to do a final calibration of each IC within the application using the Gain/OUT_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 9
Offset
Parameter
Symbol Limit Values Unit Notes
min. max.
Register size
Offset range
Offset quantization
steps
OS
15
OUT_OS -16384 16383
∆OUT_OS
1
bit
LSB₁₂
LSB₁₂
Unsigned integer value
1)
1) _{Infineon pre-calibrates the samples at zero field to 50% output value (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:
OUT_OS = OS – 16384
Data Sheet
18
Rev 1.1, 2009-09