TLE4998S3C Datasheet, PDF (26/36 Pages) Infineon Technologies AG – Programmable Linear Hall Sensor

TLE4998S3C
Calibration
9
Calibration
For the calibration of the sensor, a special hardware interface to a PC is required. All
calibration and setting bits can be temporarily written into a Random Access Memory
(RAM). This allows the EEPROM to remain untouched during the entire calibration
process, since the number of the EEPROM programming cycles is limited. Therefore,
this temporary setup (using the RAM only) does not stress the EEPROM.
The digital signal processing is completely deterministic. This allows a two-point
calibration to be performed in one step without iterations. After measuring the Hall output
signal for the two end points, the signal processing parameters Gain and Offset can be
calculated.
Table 15 Calibration Characteristics
Parameter
Symbol Limit Values
min. max.
Ambient temperature at T_CAL
calibration
10 30
2 point Calibration
accuracy¹⁾
∆OUT_CAL1 -8
8
∆OUT_CAL2 -8
8
1) _{Corresponds to ± 0.2% accuracy in each position}
Unit Notes
°C
LSB₁₂ Position 1
LSB₁₂ Position 2
Data Sheet
26
Rev 1.1, 2009-09