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Micronas expands sensor family with HAL 2455

03 Oct 2013

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Micronas has announced the expansion of its HAL 24xy sensor portfolio with the addition of the programmable HAL 2455 Hall-effect sensor with PWM output. The HAL 2455 has target applications in vehicles, such as in gearshift mechanisms and position detection in ride-height and other settings. Other utilisations include angular measurements of up to 180° and the replacement of conventional potentiometers.

Like its predecessor the HAL 2425, the HAL 2455 is capable of linearizing the output signal using 16 set-points with 12bit accuracy. For the storage of the needed calibration parameters, the sensor is equipped with a temperature-resistant EEPROM, which operates over the complete junction-temperature range from –40°C to 170°C. With the inclusion of an SMD package version, the application can be adjusted to all mechanical positioning requirements and cost-saving production processes.

The use of a flexible output compensation leads to a higher linearity of the output signal and enables not only improved accuracy, but also contributes to the reduction of overall system costs. The possible use of smaller magnets enables further cost reduction and saving of space. Due to their sensitivity and their minimum offset drift over the entire temperature range, the HAL 24xy family ensures stability of all critical parameters in various customer applications. In the automobile setting, this means safe operation of the sensors throughout the whole vehicle life cycle.

All derivatives have an extended feature set for detecting and identifying potential sources of errors. The broad range of diagnostic functions includes detection and signalling of wiring problems, locating short circuits at the output stage, and providing various internal self-tests of the complete sensor signal path and the memory environment. All errors are indicated by a halved PWM frequency and are decodable via dedicated duty cycles. All members of the HAL 24xy family meet the EMC requirements of the automotive industry and offer ESD protection.

All sensors can be programmed directly via the bidirectional output pin by varying the output voltage without the need for a separate programming pin.

Samples of the HAL 2455 with PWM output will be available in the first quarter of 2014. Production start for the SOIC8 package is scheduled for the second quarter of 2014.

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