TLE 4941, TLE 4941 C Appendix B release 1.0 1. Occurrence of initial calibration delay time td,input If there is no input signal (standstill), a new initial calibration is triggered each 0.7s. This calibration has a duration td,input of max. 300s. No input signal change is detected during that initial calibration time. In normal operation (signal startup) the probability of t d,input to come into effect is: td,input / time frame for new calibration 300s/700ms = 0,05%. After IC resets (e.g. after a significant undervoltage) td,input will always come into effect. 2. Magnetic input signal extremely close to a switching threshold of PGA at signal startup: After signal startup generally all PGA switching into the appropriate gain state happens within less than one signal period. This is included in the calculation for nDZ-Start. For the very rare case that the signal amplitude is extremely close to a PGA switching threshold and the full range of following speed ADC respectively, a slight change of the signal amplitude can cause one further PGA switching. It can be caused by non-perfect magnetic signal (e.g. amplitude modulation due to tolerances of pole-wheel, tooth wheel or air gap variation). This additional PGA switching can result in a further delay of the output signal (nDZ-Start) up to three magnetic edges leading to a worst case of nDZ-Start=9. Due to the low probability of this case it is not defined as max. value in the data sheet. (For a more detailed explanation please refer to the document "TLE 4941/42 - Frequently Asked Questions"). TLE 4941 - TLE 4941C Data Sheet 1 April 2001