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KMZ49 Magnetic field sensor NXP
NXP Semiconductors. NXP
KMZ49 Datasheet PDF : 13 Pages
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Magnetic field sensor
Rev. 1 — 31 October 2011
Product data sheet
1. Product profile
1.1 General description
The KMZ49 is a sensitive magnetic field sensor, employing the magnetoresistive effect of
thin-film permalloy. The sensor contains two galvanic separated Wheatstone bridges, at a
relative angle of 45to each other.
A rotating magnetic field in the x-y plane will produce two independent sinusoidal output
signals, one a function of +cos(2) and the second a function of +sin(2), being the
angle between sensor and field direction (see Figure 2). The KMZ49 is suited to high
precision angle measurement applications under low field conditions (saturation field
strength 25 kA/m).
The sensor can be operated at any frequency between 0 Hz and 1 MHz.
1.2 Features and benefits
Accurate and reliable angle measurement
Mechanical robustness, contactless principle
Wear-free operation
Accuracy independent of mechanical tolerances
Extended temperature range
1.3 Applications
Steering angle and torsion
Headlight adjustment
Motor positioning
Window wipers
Fuel level
Mirror positioning
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