Micronas has expanded its sensor product range with the
high-precision programmable HAL 2420 and HAL 2425 Hall-effect sensors.
With these first members of the HAL 24xy family, the company offers
robust sensor solutions featuring high temperature stability and
including wide-ranging diagnosis functions and effective protective
The HAL 24xy family is based on Micronas'
semiconductor technology with new digital architecture and further
enhanced Hall elements. The HAL 2425 and HAL 2420 are particularly
suitable for use in vehicles representing the ideal solution for
detecting throttle valve and accelerator position, and for exhaust gas
recirculation. Other typical applications
include angular measurements up to 180°, any types of position
detection and the wear-free replacement of conventional potentiometers.
As the distance information gained is in principle subject to certain
deviations, the HAL 2425 is capable of linearizing the output signal
using 16 setpoints with 12 bit accuracy. For the storage of the needed
parameters, the sensor is equipped with a very temperature-resistant
EEPROM which operates reliably over the complete junction-temperature
range from -40 °C to 170 °C.
The higher linearity of the output signal, achieved by using a more
flexible output compensation, enables customers to lower their system
costs. Another advantage is the saving in space and cost by using
smaller magnets. Customers also have the option of measuring larger
distances while maintaining their existing solutions, the company said.
Both the HAL 2425 and the HAL 2420 have an enlarged feature set for
detecting and identifying potential sources of errors. The range of
diagnosis functions includes detecting and signalling wiring problems,
locating short circuits at the output stage and various self-tests
across the entire sensor signal path and the memory environment. Being a
member of the HAL 24xy family, the new sensors also offer a high degree
of ESD and EMC protection. With 8 kV (HBM), they outperform most sensor
solutions currently available on the market.
Both the HAL 2425 and the HAL 2420 can be programmed directly via the
bidirectional output pin by varying the supply voltage without the need
for a separate programming pin.
The HAL 24xy sensors are available in the moldable TO92-UT package.
First samples of the HAL 2420 with analog output and somewhat simpler
compensating function have been available since October 2012. The HAL
2425 will see its market launch in the course of November 2012. Start of production is scheduled for the second quarter of 2013.
Micronas will present the HAL 2420 and HAL 2425 sensors from November
13 to 16 at the electronica in Munich (hall A6, booth 215).
This article originally appeared in EE Times Europe.