MPVZ2202 Motorola Semiconductor, MPVZ2202 Datasheet - Page 4

• Manufacturer Part Number: MPVZ2202
• Description: Temperature Compensated and Calibrated Presure Sensors
• Manufacturer: Motorola Semiconductor

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MPVZ2202
4
the equation: V
pressure range. There are two basic methods for calculating
nonlinearity: (1) end point straight line fit (see
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.
MPVZ2202 series at 25×C. The output is directly proportional
to the differential pressure and is essentially a straight line.
Linearity refers to how well a transducer's output follows
Figure 3
shows the output characteristics of the
out
= V
off
LINEARITY
+ sensitivity x P over the operating
ON-CHIP TEMPERATURE COMPENSATION AND CALIBRATION
PSI
kPa
40
35
30
25
20
15
10
-5
5
0
0
VS = 10 Vdc
TA = 25°C
P1 > P2
Figure 2. Linearity Specification Comparison
Figure 3. Output versus Pressure Differential
Exaggerated
Performance
Curve
Least Squares Fit
25
0
Offset
MAX
Figure
7.25
50
75
2) or (2)
Pressure (% Fullscale)
Pressure
TYP
14.5
100
MIN
End Point Straight
Line Fit
50
125
(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.
are very small and are shown under Operating
Characteristics.
21.75
150
Conversely, an end point fit will give the “worst case” error
The effects of temperature on Full Scale Span and Offset
175
200
29
Straight Line
Deviation
Range
100
Span
(TYP)
Least
Square
Deviation
Offset
(TYP)
Freescale Semiconductor
Sensors