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MPXV2010GP Datasheet(PDF) 5 Page - Freescale Semiconductor, Inc |
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MPXV2010GP Datasheet(HTML) 5 Page - Freescale Semiconductor, Inc |
5 / 14 page MPX2010 Sensors Freescale Semiconductor 5 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. Figure 4. Linearity Specification Comparison PRESSURE (P1)/VACUUM (P2) SIDE IDENTIFICATION TABLE Freescale 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 Freescale MPX pressure sensor is designed to operate with positive differential pressure applied, P1 > P2. The Pressure (P1) side may be identified by using the following table. Least Square Deviation Pressure (% Full Scale) 0 50 100 End Point Straight Line Fit Exaggerated Performance Curve Least Squares Fit Offset Straight Line Deviation Table 3. Pressure (P1) Side Delineation Part Number Case Type Pressure (P1) Side Identifier MPX2010D 344 Stainless Steep 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 |
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