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MPMZ2202GS Datasheet(PDF) 4 Page - Freescale Semiconductor, Inc |
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MPMZ2202GS Datasheet(HTML) 4 Page - Freescale Semiconductor, Inc |
4 / 7 page MPMZ2202 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. The specified pressure sensor linearities are based on the end point straight line method measured at the midrange pressure. Operating characteristics, internal reliability and qualification tests are based on use of dry clean air as the pressure media. Media other than dry clean air may have adverse ef fect s on se nsor performance and long term reliability. Contact the factory for information regarding media compatibility in your application. Figure 2. Linearity Specification Comparison ON-CHIP TEMPERATURE COMPENSATION AND CALIBRATION Figure 3 shows the minimum, maximum and typical output characteristics of the MPMZ2202 series at 25 °C. The output is directly proportional to the differential pressure and is es- sentially a straight line. A gel isolates the die surface and wire bonds from the en- vironment, while allowing the pressure signal to be transmit- ted to the silicon diaphragm. Figure 3. Output versus Pressure Differential Pressure(% Fullscale) 050 100 End Point Straight Line Fit Exaggerated Performance Curve Least Squares Fit Least Square Deviation Straight Line Deviation Offset Least Square Deviation kPa PSI 40 35 30 25 15 10 5 0 -5 050 7.25 100 14.5 150 21.75 200 29 20 MAX TYP MIN Offset (TYP) Span Range (TYP) 25 75 125 175 VS = 10 Vdc TA = 25°C |
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Similar Description - MPMZ2202GS |
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