MAGNETIC ANGLE SENSOR
KMT32B
Preliminary
HL PLANARTECHNIK GmbH • Hauert 13 • 44227 Dortmund • Germany • www.hlplanar.de
service@hlplanar.de • phone: +49-(0)231-97400 • fax: +49-(0)231-974020
KMT32B_PreliminaryDataSheet (2007-01-12)-1.doc
Last update 19.01.07
FEATURES
•
Contactless angular position
•
Ideal for harsh environments due to
magnetic sensing
•
Factory optimized linearity
•
Low Cost
•
High Accuracy
•
High rotational speed up to 30,000
rpm
•
Extended operating temperature
range (-40 °C to +150 °C)
•
Low Power
•
RoHS compliant (lead free)
•
SMD package
APPLICATIONS
•
Absolute and incremental angle
•
Angle Measurement
•
Motor motion control
•
Robotics
•
Camera positioning
•
Potentiometer replacement
•
Automotive
PACKAGES
General Description
The KMT32B is a magnetic field sensor based on the anisotropic
magnetoresistance effect. The sensor contains two parallel
supplied Wheatstone bridges, which enclose a sensitive angle of
45 degrees.
A rotating magnetic field in the surface parallel to the chip (x-y
plane) will deliver two independent sinusoidal output signals, one
following a cos(2α) and the second following a sin(2α) function, α
being the angle between sensor and field direction (see Figure
1).
SM8
SO8
TDFN
Die
-15
-10
-5
0
5
10
15
0
45
90
135
180
225
270
315
360
α
[de g]
bridge1 (sin)
bridge2 (cos)
KMT32B
GND1
GND2
+Vo2
+Vo1
-Vo1
-Vo2
+Vcc2
+Vcc1
Figure 1: Characteristic curves for KMT32B
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