TLE4923 Datasheet, PDF (13/18 Pages) Siemens Semiconductor Group – Dynamic Differential Hall Effect Sensor IC

TLE 4923
Wheel Profile
N(S)
S(N)
1
3
B1 B2
Missing Tooth
Magnetic Field Difference
∆B = B2-B1
∆B_RP = 0.75 mT
∆B_OP = -0.75 mT
Small Airgap
Large Airgap
∆ B _HY
Output Signal
Ι_S
( ^{Operate point : B2-B1< ∆BOP switches the output ON}
Release point : B2-B1> ∆ B_RP switches the output OFF
high
low
current
∆B_RP = ∆B_OP+ ∆B_HY
The magnetic field is defined as positive if the south pole of
the magnet shows towards the rear side of the IC housing.
Figure 13 System Operation
AED01900
Semiconductor Group
13
1998-04-29