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KMI16 データシート(Datasheet) 4 Page - NXP Semiconductors

部品番号. KMI16
部品情報  Integrated rotational speed sensor
ダウンロード  12 Pages
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メーカー  PHILIPS [NXP Semiconductors]
ホームページ  http://www.nxp.com
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 4 page
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2000 Sep 05
4
Philips Semiconductors
Product specification
Integrated rotational speed sensor
KMI16/1
FUNCTIONAL DESCRIPTION
The KMI16/1 sensor is sensitive to the motion of ferrous
gear wheels or reference marks. The functional principle is
shown in Fig.3. Due to the effect of flux bending, the
different directions of magnetic field lines in the
magnetoresistive sensor element will cause an electrical
signal. Because of the chosen sensor orientation and the
direction of ferrite magnetization, the KMI16/1 is sensitive
to movement in the ‘y’ direction in front of the sensor only
(see Fig.2).
The magnetoresistive sensor element signal is amplified,
temperature compensated and passed to a Schmitt trigger
in the conditioning integrated circuit (see Fig.4). The digital
output signal level is independent of the sensing distance
within the measuring range (see Fig.10). A (3-wire) output
current enables safe transfer of the sensor signal to the
detecting circuit (see Fig.5). The integrated circuit housing
is separated from the sensor element housing to optimize
the sensor behaviour at high temperatures.
handbook, halfpage
y
z
xx
IC
sensor
magnet with
direction of
magnetization
MBK767
Fig.2 Component detail of the KMI16/1.
handbook, full pagewidth
gear wheel
magnet
magnetic
field lines
(a)
(b)
(c)
direction
of
motion
(d)
MRA957
sensor
y
z
Fig.3 Functional principle.




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