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參數(shù)資料
| 型號： | KMI18 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 速度傳感器和接近開關 |
| 英文描述： | Integrated rotational speed sensor |
| 封裝： | KMI18/4<SOT477A (SOT477A)|<<http://www.nxp.com/packages/SOT477A.html<1<Always Pb-free,; |
| 文件頁數(shù)： | 5/12頁 |
| 文件大?。?/td> | 76K |
| 代理商： | KMI18 |
2000 Sep 05
5
Philips Semiconductors
Preliminary specification
Integrated rotational speed sensor
KMI18/2
FUNCTIONAL DESCRIPTION
The KMI18/2 is sensitive to the rotation of an active target
wheel with magnetic reference marks. The functional
principle is shown in Fig.8. Because of the sensor layout
and setup of the measuring system, only movements of
reference marks in the y-direction will be sensed
(coordinate system see Fig.2).
The electrical output signal of the sensor is amplified,
temperature compensated and applied to a Schmitt trigger
in the signal conditioning circuit (see Fig.9). An additional
housing separates the conditioning circuitry from the
magnetorestive sensor element, thereby ensuring optimal
sensor performance at high temperatures.
The signal level of the digital output is independent from
the sensing distance within the measuring range. Its
frequency equals that of the reference marks on the target
wheels
(1)
.
An open collector voltage interface ensures accurate
transmission(threewires)ofthedigitalsensorsignaltothe
subsequent signal conditioning electronics.
(1) See relevant application notes for specific target wheel data.
handbook, halfpage
y
z
x
x
IC
sensor
magnet with
direction of
magnetization
MBL227
1
2
3
Fig.2 Component detail and coordinate system.
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