TLE4998S8D Grade1

General

Technical Product Description

9

Revision 1.0, 2013-02-22

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.

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.

spinning

HALL

A

D

DSP

A

D

Temp.

Sense

ROM

EEPROM

Interface

OUT

VDD

GND

Supply

TST

Stress

Sense

SENT

Bias