TLE4942-1C Datasheet, PDF (7/31 Pages) Infineon Technologies AG – Differential Two-Wire Hall Effect Sensor-IC

TLE4942-1C
In addition to the speed signal, the following information is provided by varying the length
of the output pulses in Figure 3 (PWM modulation):
Airgap Warning range = Warning
Warning information is issued in the output pulse length when the magnetic field is below
a critical value (e. g. the airgap between the Hall Effect IC and the target wheel exceeds
a critical value). The device works with reduced functionality. Warning information is
given only in calibrated mode.
Assembly position range = EL
EL information is issued in the output pulse length when the magnetic field is below a
predefined value (the airgap between the Hall Effect IC and the target wheel exceeds a
predefined value). The device works with full functionality.
Direction of rotation right = DR-R
DR-R information is issued in the output pulse length when the target wheel in front of
the Hall Effect IC moves from the pin GND to the pin V_CC.
Direction of rotation left = DR-L
DR-L information is issued in the output pulse length when the target wheel in front of
the Hall Effect IC moves from the pin V_CC to the pin GND. At sufficient magnetic field the
direction information will be corrected already during uncalibrated mode after 2 pulses.
DR-L
DR-R
S 0015
4201R4
AEA03193
Figure 5 Definition of Rotation Direction
Data Sheet
8
V 4. 0, February 2010