Electric Energy Metering System Simplified (Single-Phase Electric Energy Metering System AD7551) Circuit

Published:2011/5/21 1:39:00 Author:Robert | Keyword: Electric Energy, Metering System, Single-Phase | From:SeekIC

The electric energy metering system simplified circuit is shown in the picture below which is made up by AD7551 and the 89C51 MCU. C1~C4 are +5V power decoupling capacitor. The R-nor port is connected with the UDD through a pull-up resistance R1 to make the R-nor port be 1 and the reset port disabled. The 3.679545MHz crystal and capacitor C5, C6 are made up oscillation circuit to provide the timing signals to AD7751. C7 is the denoising capacitor of Uref(i/o) port.



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