Hi I'm looking at the datasheet.
I wonder why the accuracy specs(eg,Total Active Energy ) is defined as typical.
Do you have min/max data?
If not, how much percentage of vibration should be considered?
It is specified as a typical because there are so many factors that go into the energy error calculation. I don't have a min/max spec but what is helpful in understanding how much variation to expect can be found in the data sheet.
If you go down to page 14, there are a lot of typical performance plots which show how much variation you can expect in the ADE7880 over temperature, over supply, etc...
This data sheet for the ADE7978 is helpful as well because it has a little more information on variation and it is similar enough to the ADE7880 that accuracy plots can be used to understand the repeatability. On page 29, are repeatability plots for energy linearity down past 1000:1 and the sigma at two different input levels is specified. This can give you a better understanding as to where that 0.1% comes from.
Thanks for your answer!!
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