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KMT36H 360° Angular Sensor
TDFN outline 2.5x2.5x0.75 mm
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AMR Sensor with 360° capability
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Three 120° phase-shifted signals
Moderate field strength requirements
DESCRIPTION
The KMT36H is a magnetic field sensor utilizing the anisotropic magneto resistance effect. Therefore
the sensor is sensing the magnetic field direction rather than the magnetic field strength. The sensor
contains three Wheatstone bridges rotated by 120°. A rotating magnetic field (typical strength 25 kA/m
in the sensor plane) will result in three sinusoidal output signals with a period of 180°, phase shifted by
60° field angle. By use of a modified atan algorithm the field angle can be calculated with high
accuracy.
As an unique feature, the KMT36H is able to measure full 360° by utilizing an additional magnetic field
which is generated by a planar coil that is integrated on the chip. The 180°/360° determination is done
by a simple sign distinction and may be computed periodically or only once at power up.
FEATURES
APPLICATIONS
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Ideal for harsh environments due to
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Absolute angle measurement
magnetic sensing principle
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Contactless absolute angular measurement
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Potentiometer replacement
over 360°
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Accuracy better than +/- 0.5°
Three bridge signals with 120° phase
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Motor motion control
Camera positioning
difference
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Tiny TDFN-housing 2.5 x 2.5 x 0.8 mm
3
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Robotics
KMT36H Rev 5
www.meas-spec.com
1/6
2013-April
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