TLE4998P8D

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XENSIV(TM) - TLe4998P8D Linear Hall sensor with minimal drift of output signal over temperature and lifetime

The linear Hall IC TLE4998P8D has been designed specifically to meet the requirements of highly accurate angle and position detection. The sensor provides a digital PWM signal, which is well suited for direct decoding by any unit measuring a duty cycle of a rectangular signal (usually a timer/capture unit in a microcontroller). 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.

Zusammenfassung der Merkmale

  • Integration of two individual programmable Linear Hall sensor IC’s with PWM open-drain output signal
  • 20-bit Digital Signal Processing
  • Digital temperature and stress compensation
  • 12-bit overall resolution
  • Operating automotive temperature range -40°C to 125°C
  • Minimal drift of output signal over temperature and lifetime
  • Programmable parameters stored in EEPROM with single bit error correction:
    • PWM output frequency
    • Magnetic range, sensitivity (gain), offset, and polarity of the output slope
    • Bandwidth
    • Clamping levels
    • Customer temperature compensation coefficients for all common magnets
  • Re-programmable until memory lock
  • Supply voltage 4.5 - 5.5 V (4.1 - 16 V extended range)
  • Configurable magnetic range: ±50 mT, ±100 mT, or ±200 mT
  • Reverse-polarity and overvoltage protection for all pins
  • Output short-circuit protection
  • On-board diagnostics (overvoltage, EEPROM error)
  • Digital readout of the magnetic field and internal temperature in calibration mode
  • Programming and operation of multiple sensors with common power supply
  • Two-point calibration of magnetic transfer function without iteration steps

 

Potentielle Zielanwendungen

  • 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 safety applications such as pedal position, throttle position and steering torque sensing

 

 

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