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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPXM2102AS датащи(PDF) 312 Page - Motorola, Inc |
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MPXM2102AS датащи(HTML) 312 Page - Motorola, Inc |
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312 / 670 page  MPXM2102 SERIES 3–166 Motorola Sensor Device Data www.motorola.com/semiconductors 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 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 2. Linearity Specification Comparison LEAST SQUARE DEVIATION PRESSURE (% FULLSCALE) 0 50 100 END POINT STRAIGHT LINE FIT EXAGGERATED PERFORMANCE CURVE LEAST SQUARES FIT STRAIGHT LINE DEVIATION OFFSET ON–CHIP TEMPERATURE COMPENSATION and CALIBRATION Figure 3 shows the minimum, maximum and typical output characteristics of the MPXM2102 series at 25 °C. The output is directly proportional to the differential pressure and is es- sentially a straight line. 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. Figure 3. Output versus Pressure Differential kPa PSI 40 35 30 25 15 10 5 0 –5 025 3.62 50 7.25 75 10.87 100 14.5 SPAN RANGE (TYP) OFFSET (TYP) 20 TYP MIN VS = 10 Vdc TA = 25°C P1 > P2 MAX ORDERING INFORMATION Device Type Options Case Type Device Type Options Case Type MPXM2102D Non–ported 1320 MPXM2102DT1 Non–ported, Tape and Reel 1320 MPXM2102GS Ported 1320A MPXM2102GST1 Ported, Tape and Reel 1320A MPXM2102A Non–ported 1320 MPXM2102AT1 Non–ported, Tape and Reel 1320 MPXM2102AS Ported 1320A MPXM2102AST1 Ported, Tape and Reel 1320A Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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