TLE4998P8D Datasheet, PDF (9/21 Pages) Infineon Technologies AG – High Performance Programmable Dual Linear Hall Sensor

TLE4998P8D Grade1
2
General
All further given descriptions are regarded to both implemented sensor IC’s, or otherwise noted.
2.1
Block Diagram
Figure 2-1 shows is a simplified block diagram.
General
VDD
Bias
Supply
EEPROM
Interface
TST
spinning
HALL
Temp.
Sense
Stress
Sense
A
D
DSP
A
D
PWM
OUT
GND
ROM
Figure 2-1 Block Diagram of the TLE4998P8D with the PWM interface
2.2
Functional Description
The linear Hall IC TLE4998P8D has been designed specifically to meet the requirements of highly accurate angle
and position detection, as well as for current measurement applications. Especially the dual Die version with
electrical insulated sensor IC’s, mounted on top and bottom side of the lead frame will give designs/designers a
competitive advantage when stringent safety requirements in automotive applications have to be met.
The sensor provides a digital PWM signal, which is ideally suited for direct decoding by any unit measuring a duty
cycle of a rectangular signal (usually a timer/capture unit in a microcontroller).Furthermore, it is possible to attach
an external lowpass filter, which allows an A/D conversion using the sensor supply voltage as a reference.
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.
Digital signal processing using a 16-bit DSP architecture together with digital temperature and stress
compensation guarantees excellent stability over the whole temperature range and life time.
While the overall resolution is 12 bits, some internal stages work with resolutions up to 20 bits.
The PWM output frequency can be selected within the range of 122 Hz up to 1953 Hz.
Technical Product Description
9
Revision 1.0, 2014-05-21