TLE4998S3

可编程线性霍尔传感器 Programmable Linear Hall Sensor

Description:

The 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:

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SPC Short PWM Code protocol with enhanced interface features based on SENT Single Edge Nibble Transmission,defined by SAE J2716

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20-bit Digital Signal Processing DSP

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Digital temperature compensation

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16-bit overall resolution

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Operates within automotive temperature range

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Low drift of output signal over temperature and lifetime

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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

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Supply voltage 4.5 - 5.5 V 4.1 - 16 V in extended range

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Operation between -200 mT and +200 mT within three ranges

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Reverse-polarity and overvoltage protection for all pins

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Output short-circuit protection

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On-board diagnostics overvoltage, EEPROM error, start up

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Output of internal magnetic field values and temperature

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Programming and operation of multiple sensors with common power supply

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Two-point calibration of magnetic transfer function without iteration steps

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High immunity against mechanical stress, EMC, ESD