Page 2 of 29

Pin configuration PG-SSO-3-91

Pin definition and Function

Functional description:

The basic operation of the TLE4983C is to map a „high positive“ magnetic field (tooth)

into a “low” electrical output signal and to map a „low positive“ magnetic field (notch) into

a “high” electrical output. Optionally the other output polarity can be chosen by

programming the PROM. A magnetic field is considered as positive if the North Pole of a

magnet shows towards the rear side of the IC housing. Since it seems that also

backbias-reduced magnetic configurations still show significant flux densities in one

distinct direction the circuit will be optimised for one flux direction in order to provide an

optimal signal to noise behaviour.

For understanding the operation of the TLE4983C three different modes have to be

considered: Initial operation after power up: This mode will be referred to as „initial

mode“. Operation following the initialisation before having full information about the

target wheel: This mode will be referred to as “precalibrated mode”. Normal operation

with running target wheel: This mode will be referred to as „calibrated mode“.

Pin No.

Symbol

Function

1

Supply Voltage

2

GND

Ground

3

Q

Open Drain Output