TLE4998S8D Datasheet, PDF (9/23 Pages) Infineon Technologies AG – High Performance Programmable Dual Linear Hall Sensor

TLE4998S8D 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
SENT
OUT
GND
ROM
Figure 2-1 Block Diagram of the TLE4998S8D with the SENT interface
2.2
Functional Description
The linear Hall IC TLE4998S8D 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 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.
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 16 bits, some internal stages work with resolutions up to 20 bits.
Technical Product Description
9
Revision 1.0, 2013-02-22