TLE4942-2 Datasheet, PDF (3/9 Pages) Infineon Technologies AG – Differential Two-Wire Hall Effect Sensor IC

TLE4942-2, TLE4942-2C Supplement
Calibrated mode:
See TLE4942 data sheet.
Additional notes:
Unlike the TLE4942 the first output pulse might occur before the first zero-crossing of
the magnetic input signal. Therefore the maximum number of edges until the
calibrated mode is active is increased by one for TLE4942-2. However, referring to
the input signal the delay between startup of the signal and first calibrated output
signal is identical with TLE 4942.
Typically the phase error due to PGA-transition (row 7 to 15) reduces the error
caused by switching the mode from uncalibrated to calibrated.
In very rare cases a further PGA switching can occur during the calibration process.
It can take place when the signal is extremely close to a PGA switching threshold.
This additional switching might delay the transition to calibrated mode by two to three
more pulses. The probability of this case is mainly depending on variations of
magnetic amplitude under real automotive conditions. (See appendix B)
The direction detection feature is active in the calibrated mode only. Therefore
identical to TLE4942 the correct direction information is available after the first three
output pulses in calibrated mode. Regarding the rare case mentioned before
combined with other initial conditions this may lead to a worst case of 11 pulses
before correct direction information is guaranteed. The typical value is 5 pulses.
TLE4942-2 - TLE4942-2C Data sheet supplement 3
February 2002