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ADE7763 how to get 0.2% accuracy?

Question asked by NatsK on Oct 27, 2016
Latest reply on Jan 9, 2017 by dlath


We have been working with ADE7763 for energy metering project. At this point we have an accuracy of around 1.5% after doing watt gain and watt offset calibration. The same HW design is used as in ADE7763 datasheet, 0.01ohm shunt is used as a current sensor. Rated current is 5A and voltage is 220V. We have following questions to be answered :

1. What is optimal way of improving accuracy to meet 0.2%? 

2. What would be the required number of half LINECYC for efficient offset calibration?