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Micronas releases new Hall-effect sensors through GLYN High-Tech Distribution

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article image Hall Effect Sensors

Micronas, a leading supplier of innovative application-specific IC system solutions for consumer and automotive electronics and available through GLYN High-Tech Distribution, has released HAL 82x family of programmable Hall-effect sensors designed to meet new accuracy requirements of many automotive applications.

Micronas designed the HAL 82x to meet the increasing demands on engine management in the automotive industry. Ever more accurate readings of key vehicle parameters mean lower emissions and better fuel economy.

The sensor offers high precision to meet the requirements of next-generation throttle valve position sensors. This reduces pollutant and CO2 emissions.

Other target applications include linear movement measurement, flow measurement, position detection and contactless potentiometers.

Like its predecessors of the second generation, the HAL 82x has an integrated EEPROM to store the sensor parameters. Proven in previous generations of Micronas Hall-effect sensors, the EEPROM is extremely robust and reliable, even at the allowed maximum junction temperature of 170 °C.

The sensor’s high accuracy is based on the 14-bit signal path, the integrated digital signal processing and the ratiometric 12-bit analogue output.

The sensor also features a multiplexed analogue output. With this new output format, developed by Micronas (patent pending), the 12-bit D/A-converter of the HAL 82x achieves the actual resolution of a 14 bit-converter, while avoiding the small quantisation intervals.

This delivers a perfect signal-to-noise ratio on the output.

Micronas designers put extra effort into minimising the drift of sensitivity and offset over the temperature range. This guarantees long-term stability of the main parameters, which helps to ensure the car’s optimum performance for many years.

The differential non-linearity (DNL) is below one LSB. Electrostatic discharge (ESD) is a severe issue in automotive applications and the 4-kV rating of the HAL 82x significantly surpasses other existing linear Hall sensors.

Automobile trouble-shooting and repair is enhanced by an integrated wire break detection system. This makes it easy for the engine control computer to detect and report problems with the car’s wiring.

Micronas offers a development board for design and production of the Hall sensors. The required software is available free of charge.

The RoHS-compliant HAL 82x is available in the TO 92UT package, suitable for overmoulding, and operates at ambient temperatures between –40 °C and +150 °C. Samples will be available in July 2007.

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