MPX2053D(2007) Просмотр технического описания (PDF) - Freescale Semiconductor
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Компоненты Описание
производитель
MPX2053D
(Rev.:2007)
(Rev.:2007)
Freescale Semiconductor
MPX2053D Datasheet PDF : 13 Pages
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ON-CHIP TEMPERATURE COMPENSATION AND CALIBRATION
40
35
30
25
20
15
10
5
0
–5
kPa 0
PSI
VS = 10 Vdc
TA = 25°C
MPX2053
P1 > P2
MAX
12.5
1.8
TYP
MIN
25
37.5
3.6
5.4
Span
Range
(Typical)
50
Offset
(Typical)
7.25
Figure 2. Output vs. Pressure Differential
Figure 2 shows the output characteristics of the MPX2053/
MPXV2053G 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.
Wire Bond
Silicone
Die Coat
Die
P1
Stainless Steel
Metal Cover
Epoxy
Case
Lead Frame
RTV Die
Bond
P2
Figure 3. Unibody Package: Cross Sectional Diagram (Not to Scale)
Figure 3 illustrates the differential/gauge die in the basic
chip carrier (Case 344). A silicone gel isolates the die surface
and wire bonds from the environment, while allowing the
pressure signal to be transmitted to the silicon diaphragm.
The MPX2053/MPXV2053G series pressure sensor
operating characteristics and internal reliability and
qualification tests are based on use of dry air as the pressure
media. Media other than dry air may have adverse effects on
sensor performance and long term reliability. Contact the
factory for information regarding media compatibility in your
application.
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 4) 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 (% Full Scale)
Figure 4. Linearity Specification Comparison
MPX2053
4
Sensors
Freescale Semiconductor
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