TLE5012B datasheet(25/50 Pages) INFINEON

25 / 50 page

TLE5012B

Specification

Data Sheet

Rev. 2.0, 2014-02

Figure 4-3 Additional angle error for temperature changes above 5 Kelvin within 1.5 revolutions

4.3.5

Autocalibration

The autocalibration enables online parameter calculation and therefore reduces the angle error due to

temperature and lifetime drifts.

The TLE5012B is a pre-calibrated sensor, so autocalibration is only enabled in some devices by default. The

update mode can be chosen with the AUTOCAL setting in the MOD_2 register. The TLE5012B needs 1.5

revolutions to generate new autocalibration parameters. These parameters are continuously updated. The

parameters are updated in a smooth way (one Least-Significant Bit within the chosen range or time) to avoid an

angle jump on the output.

AUTOCAL Modes:

•

00: No autocalibration

•

01: Autocalibration Mode 1. One LSB to final values within the update time tupd (depending on FIR_MD setting).

•

10: Autocalibration Mode 2. Only one LSB update over one full parameter generation (1.5 revolutions). After

update of one LSB, the autocalibration will calculate the parameters again.

•

11: Autocalibration Mode 3. One LSB to final values within an angle range of 11.25°

0.5

1.5

2.5

3.5

0 102030 4050607080 90 100 110 120 130 140 150 160 170 180 190

Delta Temperature (Kelvin) within 1.5 revolutions

Tstart -40°C

Tstart 25°C

Tstart 85°C

Tstart 105°C

Tstart 125°C

Tstart 135°C

Tstart >135°C

TLE5012B Arkusz danych(PDF) 25 Page - Infineon Technologies AG