TLE 4941plusC, a dierential Hall sensor for measuring magnetically the car´s
wheel speed, is the latest ospring of the extremely successful TLE 4941 family,
based on Infineon’s most recent sensor technologies for front- and backend.
Designed as drop-in replacement the TLE 4941plusC is, as its predecessors, a
single chipsolution combining Hall sensor elements and both analogue and
digital signal processing in one single chip. Its dierential principle makes it
immune to any kind of undesired magnetic fields and disturbances. The Hall
element distance has been downsized to 2 mm to be also fit forextremely
smallencoders. Several product improvements, both electrical and magnetic,
have been put in place, such as an accelerated calibration during start-up pha-
se and higher load dump robustness. The formerly optional first-edge-detection,
a feature for quick start-up, providing a reliable output signal even before cali-
bration is fully completed, has now become standard.
TLE 4941plusC has a standard 2-wire current interface, high ESD robustness
and works in the wide temperature range present in the harsh automotive
environment. Magnetic and device osets are cancelled by a sophisticated self-
calibration algorithm immediately after start-up.
The TLE 4941plusC is an extremely robust product due to Infineon’s high quality
standards as experienced automotive semiconductor supplier. After several
hundred million units sold, Infineon’s active wheel speed sensors have largely
proven to be the perfect match for wheel speed sensing in all aspects of functio-
nality, robustness and flexibility.
www.infineon.com/sensors
Applications
TLE 4941plusC
Dierential Hall IC for Wheel Speed Sensing
Reliable Wheel Speed Sensing in
automotive applications
Anti-lock Braking System (ABS)
Electronic Stability Program (ESP)
Automatic Transmissions
Features
Two-wire current interface: Minimizes
wiring
Dynamic self-calibration principle:
Compensates osets
Single chip solution: Ensures outstan-
dingreliability
Highsensitivity: Can be used for large
airgap applications
South and north pole pre-induction
possible: Works for both encoders
and tonewheels
High resistance to piezo eects: Suits
sensor overmoldingwide operating
temperature range
C type with 1.8 nF overmolded capa-
citor:Enhances EMC & microbreak
resistance, without any external
components
Product Brief