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Motorola Sensor Device Data
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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 5) 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 cal-
culations are more straightforward for the user. Motorola’s
specified pressure sensor linearities are based on the end
point straight line method measured at the midrange pressure.
Figure 4. Linearity Specification Comparison
LEAST
SQUARE
DEVIATION
R
PRESSURE (% FULLSCALE)
0
50
100
END POINT
STRAIGHT LINE FIT
EXAGGERATED
PERFORMANCE
CURVE
LEAST SQUARES FIT
STRAIGHT LINE
DEVIATION
OFFSET
PRESSURE (P1)/VACUUM (P2) SIDE IDENTIFICATION TABLE
Motorola designates the two sides of the pressure sensor
as the Pressure (P1) side and the Vacuum (P2) side. The
Pressure (P1) side is the side containing silicone gel which
isolates the die from the environment. The Motorola MPX
pressure sensor is designed to operate with positive differen-
tial pressure applied, P1 > P2.
The Pressure (P1) side may be identified by using the
table below:
Part Number
Case Type
Pressure (P1) Side Identifier
MPX2010D
344
Stainless Steel Cap
MPX2010DP
344C
Side with Part Marking
MPX2010GP
344B
Side with Port Attached
MPX2010GS
344E
Side with Port Attached
MPX2010GSX
344F
Side with Port Attached
MPXV2010GP
1369
Side with Port Attached
MPXV2010DP
1351
Side with Part Marking
ORDERING INFORMATION — UNIBODY PACKAGE (MPX2010 SERIES)
MPX Series
Device Type
Options
Case Type
Order Number
Device Marking
Basic Element
Differential
344
MPX2010D
MPX2010D
Ported Elements
Differential, Dual Port
344C
MPX2010DP
MPX2010DP
Gauge
344B
MPX2010GP
MPX2010GP
Gauge, Axial
344E
MPX2010GS
MPX2010D
Gauge, Axial PC Mount
344F
MPX2010GSX
MPX2010D
ORDERING INFORMATION — SMALL OUTLINE PACKAGE (MPXV2010G SERIES)
Device Type
Options
Case No.
MPX Series Order No.
Packing Options
Marking
Ported Elements
Gauge, Side Port, SMT
1369
MPXV2010GP
Trays
MPXV2010G
Differential, Dual Port, SMT
1351
MPXV2010DP
Trays
MPXV2010G
F
Freescale Semiconductor, Inc.
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