TLE4998S4 - Infineon Technologies

Overview

XENSIV(TM) - TLE4998S4 Linear Hall IC with on-board diagnostics, qualified according to AEC-Q100

The Infineon 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.Digital signal processing using a 16-bit DSP architecture together with digital temperature compensation guarantee excellent long-time stability compared to analog compensation methods. While the overall resolution is 16 bits, some internal stages work with resolutions up to 20 bits.

Summary of Features

SPC (Short PWM Code) protocol with enhanced interface features based on SENT (Single Edge Nibble Transmission,defined by SAE J2716)
20-bit Digital Signal Processing (DSP)
Digital temperature compensation
16-bit overall resolution
Operates within automotive temperature range
Low drift of output signal over temperature and lifetime
Programmable parameters stored in EEPROM with single-bit error correction: SPC protocol modes: synchronous transmission, dynamic range selection, ID selection mode,SPC unit time,Magnetic range and sensitivity (gain), polarity of the output slope,Offset,Bandwidth,Clamping levels,Customer temperature compensation coefficients,Memory lock Re-programmable until memory lock
Supply voltage 4.5 - 5.5 V (4.1 - 16 V in extended range)
Operation between -200 mT and +200 mT within three ranges
Reverse-polarity and overvoltage protection for all pins
Output short-circuit protection
On-board diagnostics (overvoltage, EEPROM error, start up)
Output of internal magnetic field values and temperature
Programming and operation of multiple sensors with common power supply
Two-point calibration of magnetic transfer function without iteration steps
High immunity against mechanical stress, EMC, ESD
Automotive qualified acc. to AEC-Q100

Benefits

Robust replacement of potentiometers, no mechanical abrasion, resistant to humidity, temperature, pollution and vibration

Potential Applications

Linear and angular position sensing in automotive applications such as pedal position, suspension control, throttle position, headlight levelling, and steering torque sensing
Sensing of high current for battery management, motor control,and electronic fuses