tle4942-2 Infineon Technologies Corporation, tle4942-2 Datasheet - Page 9

• Manufacturer Part Number: tle4942-2
• Description: Differential Two-wire Hall Effect Sensor
• Manufacturer: Infineon Technologies Corporation

TLE4942-2, TLE4942-2C Supplement
Appendix B: TLE4942-2 Application Notes Release 1.0
1. Occurrence of initial calibration delay time t
d,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 n
. For the very rare
DZ-Startup
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 (n
) up to
DZ-Startup
three magnetic edges leading to a worst case of n
=9 and
=11.
n
DZ-Start
DR-Startup
t
However, the speed signal startup, comprised of n
and
is not affected by this
d,input
DR-Startup
behaviour for TLE 4942-2.
3. - 6. Identical to TLE4942, TLE4942C Application notes.
TLE4942-2 - TLE4942-2C Data sheet supplement
9
February 2002