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| 型號： | KMA210 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 振動和傾斜傳感器 |
| 英文描述： | Programmable angle sensor |
| 封裝： | KMA210<SOT1288|<<<1<Always Pb-free,; |
| 文件頁數(shù)： | 15/36頁 |
| 文件大?。?/td> | 563K |
| 代理商： | KMA210 |
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KMA210
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 1 — 30 June 2011
15 of 36
NXP Semiconductors
KMA210
Programmable angle sensor
Equation 2
gives the mathematical description for temperature drift value
temp
:
(2)
with:
T
x
: temperature for maximum
meas
at angle
T
y
: temperature for minimum
meas
at angle
The deviation from the value at room temperature
temp
RT
describes the temperature
drift of the angle, compared to the value, which the sensor provides at room temperature:
(3)
with:
T
RT
: room temperature (25
C)
12.6 Angular error
The angular error
ang
is the error of angle difference measured by the sensor, if the
mechanical angle deviates from
0
to
1
. Here
0
and
1
are arbitrary angles within the
angular range. The angle measurement at
0
is the initially programmed reference angle,
programmed by the customer at room temperature and zero hour upon production. The
angle measurement at
1
is made at any temperature within the ambient temperature
range:
(4)
with:
0
,
1
: arbitrary mechanical angles within the angular range
meas
(
0
, T
RT
): programmed angle at
0
, T
RT
= 25
C and zero hour upon production
meas
(
1
, T
amb
): angle measured by the sensor at
1
and any temperature within T
amb
This error comprises non-linearity and temperature drift related to the room temperature.
Fig 10. Definition of the temperature drift error
001aag816
180
α
(deg)
φ
meas
(deg)
Δφ
temp
T
y
T
x
temp
( )
meas
T
x
(
,
)
meas
T
y
(
,
)
–
=
temp RT
T
amb
,
(
)
meas
T
amb
(
,
)
meas
T
RT
(
,
)
–
=
ang
meas
1
T
amb
(
,
)
meas
0
T
RT
(
,
)
–
1
0
–
–
=
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