MPVZ2202 データシートの表示（PDF） - Freescale Semiconductor
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MPVZ2202
Freescale Semiconductor
MPVZ2202 Datasheet PDF : 7 Pages
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LINEARITY
Linearity refers to how well a transducer's output follows
the equation: Vout = Voff + sensitivity x P over the operating
pressure range. There are two basic methods for calculating
nonlinearity: (1) end point straight line fit (see Figure 2) or (2)
a least squares best line fit. While a least squares fit gives the
“best case” linearity error (lower numerical value), the
calculations required are burdensome.
Conversely, an end point fit will give the “worst case” error
(often more desirable in error budget calculations) and the
calculations are more straightforward for the user.
Freescale's specified pressure sensor linearities are based
on the end point straight line method measured at the
midrange pressure.
Least Squares Fit
Exaggerated
Performance
Curve
Least
Square
Deviation
Straight Line
Deviation
End Point Straight
Line Fit
Offset
0
50
100
Pressure (% Fullscale)
Figure 2. Linearity Specification Comparison
ON-CHIP TEMPERATURE COMPENSATION AND CALIBRATION
Figure 3 shows the output characteristics of the
MPVZ2202 series at 25×C. The output is directly proportional
to the differential pressure and is essentially a straight line.
The effects of temperature on Full Scale Span and Offset
are very small and are shown under Operating
Characteristics.
40
35
30
25
20
15
10
5
0
-5
kPa 0
PSI
VS = 10 Vdc
TA = 25°C
P1 > P2
MAX
TYP
MIN
Span
Range
(TYP)
Offset
25 50 75 100 125 150 175 200
(TYP)
7.25
14.5
21.75
29
Pressure
Figure 3. Output versus Pressure Differential
MPVZ2202
4
Sensors
Freescale Semiconductor
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