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Regarding Current channel sensing through CT in ADE7953

Category: Hardware
Product Number: ADE7953

Hi, my question is regarding center tapped configuration of burden resistor.

Why this configuration is required?

What if I use single burden resistor followed by anti aliasing filter?

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  • This is not correct, the diodes do not fix the common mode correctly the common mode to ground can be a diode drop with your circuit. 

    Here are the 3 recommendations 

    1. ground one side of the burden 

    2. use 2 resistors say 1K across burden and ground the middle. 

    3. use 2 resistors as a burden and ground the middle 

    options 1 and 3 are our usual recommendations. 

    In my 25 years working with these parts option 3 gives the best performance.