Date: 7th Jun 2011
3D linear position sensor for automotive
& industrial apps
austriamicrosystems has introduced the 3D linear position
sensor AS5410 to sense absolute position in automotive &
industrial applications provides. This high resolution sensor
solution is being demonstrated during the 2011 edition of
the Sensors Expo & Conference in Rosemont, Illinois,
booth #621 and SENSOR+TEST 2011, June 7-9, 2011 in Nuremberg,
Germany, at Booth #528, Hall 12.
austriamicrosystems says the AS5410 allows absolute position
sensing of a simple two-pole magnet immediately after starting
up the device without the need for a prior reference run
within the application. Position sensing is possible over
large mechanical travel distances even with very small magnets:
a travel distance of 40mm does not pose a problem for a
small, 4 x 4 x 3 mm sized NeFeB magnet, for example, according
to austriamicrosystems.
This sensor's output is not affected by external stray
magnetic fields. austriamicrosystems claims this feature
is a worldwide first and the result of a special differential
measurement technique including several 3D Hall sensor elements.
Programming the internal EEPROM of the AS5410 allows to
convert a wide range of geometries including curved movements,
non-linear scales, and tilted chip/magnet geometries into
a linear output signal. To achieve a perfectly linearized
output (up to 0.5% accuracy), the AS5410 linear position
sensor provides an internal linearization table with 33
base points. The preset basic operating modes are selectable
via SPI. All signal conditioning is on chip, including compensation
for temperature effects.
"The AS5410's unique differential architecture makes
it perfect for use in position sensing applications that
include not only dust, dirt and moisture but also unwanted
magnetic fields," stated Bernd Gessner, Senior VP and
General Manager business unit Automotive at austriamicrosystems.
He continued, "The unique AS54xx family of 3D Hall
magnetic encoder ICs is a fundamental addition to our current
magnetic sensor product portfolio with a focus on both the
automotive and industrial markets."
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