I have a question about ADE7913's isopower.
What is the Switching Frequency(fosc)?
Accodring to conventioal iso-power device such as ADUM5000,
The datasheet says it's 180MHz
Thanks in advance.
The ADE7913 also has a switching frequency of 180 MHz. Why are you interested in the switching frequency for the application?
If for example it is because of emissions, we have done much testing to characterize the emissions and to show techniques of minimizing these. This information can be found in the application note:
This shows best practices and other helpful information for creating a meter with the ADE7913.
Thanks for your answer.
What I'm concerned about isopower is emission issues.
I had chance to use isopower ADUM5401 and the high peak emission was observed in 180MHz, 360MHz, ......
So I just want to know in advance whether ADE7913 has a similar structure or not.
Thanks for the application note information,
I'm going over it and noticed that the peak emissions at 180MHz and 360MHz are not seen in Fig 25.
Does this result come from the stitching implement?
The figures shown are all with a 4-layer PCB with the stitching capacitor implemented. Figure 25 shows the emissions results with an 84 pF stitching capacitor, while Figure 27 shows the results with a smaller 63 pF stitching capacitor. The switching frequency won't be exactly 180 MHz so the 2nd harmonic in the Figures are actually seen at 380 MHz.
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