TLE4942-2, TLE4942-2C Supplement
TLE4942-2 - TLE4942-2C Data sheet supplement
Appendix B: TLE4942-2 Application Notes Release 1.0
1. Occurrence of initial calibration delay time td,input
Identical to TLE 4942, TLE 4942 C Application notes.
2. Magnetic input signal extremely close to a PGA switching threshold during signal
After signal startup normally all PGA switching into the appropriate gain state occurs within
less than one signal period. This is included in the calculation for nDZ-Startup. For the very rare
case that the signal amplitude is extremely close to a switching threshold of the PGA and the
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
(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-Startup) up to
three magnetic edges leading to a worst case of nDZ-Start=9 and nDR-Startup=11.
However, the speed signal startup, comprised of nDR-Startup and td,input is not affected by this
behaviour for TLE 4942-2.
3. - 6. Identical to TLE4942, TLE4942C Application notes.