MPX2100 pressure sensor and its application circuit diagram Ⅰ

Published:2014/3/26 21:37:00 Author:lynne | Keyword: MPX2100 pressure sensor and its application circuit diagram Ⅰ, MPX2100 | From:SeekIC

Works MPX2100 has four pins, between an output pin to ground, 3 feet plus working pressure, 2 feet and 4 feet and differential mode voltage signal proportional to the pressure. MPX2100 is a piezoresistive pressure sensor, made ​​on a silicon substrate diffusion process four equal resistor strain elements constituting the Wheatstone bridge. Bridge has a constant voltage source and a constant current source power supply two power supply. Constant voltage source power supply schematic diagram shown in Fig. When the pressure sensor is subjected to pressure, the resistance value of a bridge arm to increase ΔR, the other arm of the resistance value is reduced ΔR, the change of resistance ΔR proportional to the pressure, i.e. ΔR = KP, the bridge output voltage Uo = E (ΔR / R) = (EK / R) P, i.e., the bridge output voltage proportional to the pressure P.



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