1-Axis and 2-Axis Hall Sensor Microsystems.
Is it possible that a CMOS IC Hall Sensor can measure
magnetic fields parallel to the chip surface like MR Sensors?
Sentron's new Hall Sensor Microsystem makes it possible.
Sentron's new Hall sensors respond to a magnetic field parallel to the
chip surface and not as conventional Hall magnetic sensors to a field
perpendicular to the device surface. They also have much higher
magnetic sensitivity than conventional Hall devices. Therfore Sentron
Hall sensors are similar to magnetoresistive sensors (MR) without
having the drawbacks of the MRs, such as non-linearity, hysteresis,
and insensitivity to the field direction.
Two new unique types, the 1SA single axis and the 2SA two-axis Hall
sensor are available. Both sensors are complete integrated CMOS
sensor systems including Hall elements, biasing circuit, amplifier, and
programming of gain, offset, and temperature coefficient. Due to this
system integration into a single chip new miniaturized applications are
feasible and a much better price- / performance - ratio can be achieved.
The 1SA is a single axis Hall sensor with world record sensitivity of up
to 300 mV/ mT. The element is particularly useful for applications where
magnetic fields are weak or where the distance between a magnet and
the sensor is big. Current sensing and distance sensing are typical
examples.
The 2SA is a two-axis Hall sensor which measures the two magnetic
field components at the same spot with an angular error of less then 1%.
A rotation of a magnetic field produces various phase shifted output
signals. The sinus and cosinus output singals are especially used for
angular position sensing, whereas the 0°, 120°, 240° output signals
are particularly useful for the current commutation in brushless
DC-motors.
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For more information, please contact :-
Sentron AG
March 2002
For more details of this product...
email our HelpDesk quoting Ref. shown below
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