TLE4943C datasheet(38/48 Pages) INFINEON

Part #	TLE4943C

Description	Hall Based Differential Wheel Speed Sensor with AK protocol

PDF	48 Pages

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Manufacturer	INFINEON [Infineon Technologies AG]

Direct Link	http://www.infineon.com

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38 / 48 page

TLE4943C

Data Sheet

V 1.2, July 2018

3.6

Degradation of Direction Signal

Direction signal is calculated as following “dB_direction = center - (left + right) / 2”. The direction detection is

optimized for a target wheel pitch of 5 mm. For pitches other than 5 mm the magnetic input signal has to be

increased to compensate signal loss accordingly. For an ideal pitch of 5mm the absolute speed signal in mT is two

times higher than direction signal due to differential principle. Speed signal in figure below is normalized to

magnetic speed signal for a pitch of 5mm. Also direction signal is normalized to speed signal (means degradation

factor=0.5) and to an ideal pitch of 5mm. Absolute values in mT are half of speed signal.

Figure 26

Degradation of speed and direction signal dependent on used target wheel pitch

0,0

0,1

0,2

0,3

0,4

0,5

0,6

0,7

0,8

0,9

1,0

012

345

Pitch / mm

Deg_speed_norm

Deg_dir_norm

TLE4943C Datasheet(PDF) 38 Page - Infineon Technologies AG