TLE4997A8 | Configurable magnetic range : ±50mT, ±100mT or ±200mT

Overview

XENSIV™ - TLE4997A8 Linear Hall sensor with digital temperature compensation

The linear Hall IC TLE4997A is designed for highly accurate angle and position detection. The sensor provides a ratiometric analog output voltage, which is ideally suited to Analog-to-Digital (A/D) conversion with the supply voltage as a reference. The IC is produced in BiCMOS technology with high voltage capability and also provides reverse polarity protection. Digital signal processing using a 16-bit DSP architecture together with digital temperature and analog stress compensation guarantees excellent stability over the whole temperature range and life time.

Summary of Features

Integration of two individual programmable Linear Hall sensor IC’s with ratiometric analog output signal.
20-bit Digital Signal Processing (DSP)
Digital temperature compensation
12-bit overall resolution
Operating automotive temperature range -40°C to 125°C
Low drift of output signal over temperature and lifetime
Programmable parameters stored in EEPROM with single-bit error correction:
- Magnetic range and sensitivity (gain), polarity of the output slope
- Offset
- Bandwidth
- Clamping levels
- Temperature compensation coefficients to accomodate most common magnet materials
- Memory lock
Supply voltage 4.5-5.5 V (4-7 V extended range)
Configurable magnetic range : ±50mT, ±100mT or ±200mT
Reverse-polarity and overvoltage protection for all pins
Output short-circuit protection
On-board diagnostics (wire breakage detection, EEPROM error, overvoltage)
Digital readout of internal temperature and magnetic field values in calibration mode
Programming and operation of multiple sensors with common power supply
Two-point calibration of magnetic transfer function

Potential Applications

Robust replacement of potentiometers: No mechanical abrasion, resistant to humidity, temperature, pollution and vibration
Linear and angular position sensing in automotive and industrial applications with highest accuracy requirements
Suited for ASIL applications such as pedal position, throttle position and steering torque sensing