TLE4942-2 查看數據表（PDF） - Infineon Technologies

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TLE4942-2

Differential Two-Wire Hall Effect Sensor IC

Infineon Technologies 

TLE4942-2, TLE4942-2C 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

startup:

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.

TLE4942-2 - TLE4942-2C Data sheet supplement 9

February 2002

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