tle4982c Infineon Technologies Corporation, tle4982c Datasheet - Page 2

• Manufacturer Part Number: tle4982c
• Description: Programmable True Power On Hall Sensor
• Manufacturer: Infineon Technologies Corporation

Functional description:
The basic operation of the TLE4982C 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 TLE4982C 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“.
Figure 1: Pin configuration in PG-SSO-3-9
Pin No.
1
2
3
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Symbol
V
GND
Q
S
Function
Supply Voltage
Ground
Open Drain Output