tle4921-3u Infineon Technologies Corporation, tle4921-3u Datasheet - Page 9

• Manufacturer Part Number: tle4921-3u
• Description: Differential Hall Sensor
• Manufacturer: Infineon Technologies Corporation

Application Configurations
Two possible applications are shown in Figure 7 and 8 (Toothed and Magnet Wheel).
The difference between two-wire and three-wire application is shown in Figure 9.
Gear Tooth Sensing
In the case of ferromagnetic toothed wheel application the IC has to be biased by the
south or north pole of a permanent magnet (e.g. SmCO
the dimensions 8 mm
The maximum air gap depends on
– the magnetic field strength (magnet used; pre-induction) and
– the toothed wheel that is used (dimensions, material, etc.; resulting differential field)
Figure 5
Figure 6
Data Sheet
DIN
d
z
m
T
d
diameter (mm)
number of teeth
module
pitch
Sensor Spacing
Toothed Wheel Dimensions
a centered distance
b Hall probes to
L IC surface to
a
b
T
of Hall probes
IC surface
tooth wheel
= 2.5 mm
= 0.3 mm
=
m
T
=
d
m
/
z
5 mm
(mm)
(mm)
AEA01260
3 mm) which should cover both Hall probes.
Conversion DIN – ASA
m = 25.4 mm/p
T = 25.4 mm CP
ASA
p
PD
CP
9
diameter pitch
pitch diameter PD =
circular pitch
L
b
5
(Vacuumschmelze VX145) with
a
N
S
p
CP = 1 inch
=
z
z
/
/
AEA01259
d
p
TLE 4921-3U
(inch)
(inch)
2000-07-01
/ p