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MPXV2102G Datasheet(PDF) 4 Page - Freescale Semiconductor, Inc |
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MPXV2102G Datasheet(HTML) 4 Page - Freescale Semiconductor, Inc |
4 / 14 page MPX2102 Sensors 4 Freescale Semiconductor 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. Figure 2. Linearity Specification Comparison ON-CHIP TEMPERATURE COMPENSATION AND CALIBRATION Figure 3 shows the output characteristics of the MPX2102/ MPXV2102G 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. Figure 3. Output vs. Pressure Differential Figure 4. Cross Sectional Diagrams (Not to Scale) Figure 4 illustrates the absolute sensing configuration (right) and the differential or gauge configuration 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 MPX2102/MPXV2102G 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. Least Square Deviation Pressure (% Fullscale) 0 50 100 End Point Straight Line Fit Exaggerated Performance Curve Least Squares Fit Offset Straight Line Deviation VS = 10 VDC TA = 25°C MPX2102 P1 > P2 40 35 30 25 20 15 10 5 0 -5 TYP MAX MIN Span Range (TYP) Offset (TYP) 025 50 75 100 kPa PSI 3.62 7.25 10.88 14.5 Lead Frame Wire Bond Differential/Gauge Die Silcone Gel Die Coat Differential/Gauge P2 Die Bond Epoxy Case Stainless Steel Metal Cover P1 Silicone Gel Die Coat Absolute Die P1 Metal Cover Epoxy Case Absolute Element P2 Lead Frame Wire Bond Die Bond Stainless Steel Element |
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Similar Description - MPXV2102G |
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