The linear Hall IC TLE4998S8D has been designed specifically to meet the requirements of highly accurate angle and position detection. The sensor provides a digital SENT signal based on the SAE J2716 standard, which consists of a sequence of pulses. Each transmission consists of multiple data 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.
Summary of Features:
- Integration of two individual Linear Hall sensor IC’s with Single Edge Nibble Transmission (SENT) open-drain
- output signal (SAE J2716)
- 20-bit Digital Signal Processing (DSP)
- Digital temperature and stress compensation
- 16-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:
- SENT unit time
- Magnetic range, sensitivity (gain), offset, and polarity of the output slope
- Filter 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)
- 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
- 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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