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ADE7816 Current Channel Return Path Consolidation

Question asked by jtoddowen on Apr 27, 2018
Latest reply on May 13, 2018 by Gary.Kang.AnalogDevices

The ADE7816 has three current input channels with dedicated "return" paths exposed IAP/IAN, IBP/IBN and ICP/ICN; however, the three remaining current input channels IDP, IEP and IFP share a common return path, simply IN, which internally ties the three channels together.  See Figures 1 and 22 of the datasheet.

 

Is there any reason I cannot (or should not) tie IAN, IBN and ICN together with IN and apply only a single anti-aliasing filter, saving six components (3 resistors and 3 caps)?  Or, since channels A, B and C share a common gain, can they be tied together, but remain separate from IN (saving four components)?

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