TLE4998S3 Datasheet, PDF (9/39 Pages) Infineon Technologies AG – Programmable Linear Hall Sensor

2
General
2.1
Block Diagram
Figure 3 is a simplified block diagram.
TLE4998S
General
VDD
Bias
Supply
EEPROM
Interface
TST^*)
spinning
A
HALL
D
Temp.
A
Sense
D
DSP
SENT
OUT
Figure 3
ROM
Block Diagram (TLE4998S4)
*) TLE4998S4 only
GND
2.2
Functional Description
The linear Hall IC TLE4998S has been designed specifically to meet the requirements
of highly accurate rotation and position detection, as well as for current measurement
applications.
The sensor provides a digital SENT signal based on the SAE J2716 standard, which
consists of a sequence of pulses. Each transmission has a constant number of nibbles
containing the Hall value, the temperature, and status information of the sensor.
The output stage is an open-drain driver pulling the output pin to low only. Therefore, the
high level needs to be obtained by an external pull-up resistor. This output type has the
advantage that the receiver may use an even lower supply voltage (e.g. 3.3 V). In this
case the pull-up resistor must be connected to the given receiver supply.
The IC is produced in BiCMOS technology with high voltage capability, and it also has
reverse-polarity protection.
Data Sheet
9
V 1.0, 2008-07