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The Linear Hall IC TLE4997A8DE0300XUMA1 is designed for high accuracy angle and position detection. The sensor provides a ratiometric analogue output voltage, ideal for analogue-to-digital (A/D) conversion with a supply voltage reference. The integrated circuits are fabricated in BiCMOS technology for high voltage tolerance and reverse polarity protection. Digital signal processing using a 16-bit DSP architecture, as well as digital temperature and analogue stress compensation, ensures excellent stability over the entire temperature range and lifetime.

Functional Overview

Integrates two separate programmable linear Hall sensor ICs with ratiometric analogue output signals.

20-bit digital signal processing (DSP)

Digital temperature compensation

12-bit overall resolution

Operating automotive temperature range -40°C to 125°C

Low output signal drift over temperature and lifetime

Programmable parameters stored in EEPROM with single-bit error correction

Magnetic field range and sensitivity (gain), polarity of the output slope

Offset

Bandwidth

Clamp level

Temperature-compensated coefficients for most common magnet materials

Memory lockout

Supply voltage 4.5-5.5 V (extended range 4-7 V)

Configurable magnetic field range: ±50mT, ±100mT, or ±200mT

Reverse polarity and overvoltage protection on all pins

Output short circuit protection

On-board diagnostics (wire break detection, EEPROM errors, overvoltage)

Digital readout of internal temperature and magnetic field values in calibration mode

Programming and operation of multiple sensors using a common power supply

Two-point calibration of magnetic transfer function

Potential Applications

Rugged alternative to potentiometers: no mechanical wear and tear, resistant to humidity, temperature, contamination and vibration

Linear and angular position sensing for automotive and industrial applications where highest accuracy is required

Suitable for ASIL applications such as pedal position, throttle position and steering torque sensing

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