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. _______________________________________________________ For more information, please contact :- Sentron AG March 2002 For more details of this product... email our HelpDesk quoting Ref. shown below Ref: Sentron003
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