Regarding Current channel sensing through CT in ADE7953

You can use a single burden but you will be limited to singled ended amplitudes and worse common mode rejection. Differential allows for a larger swing into the amplifier so better snr and common mode rejection. 

Single ended burden may be fine for your testing. I recommend center taped burden for best performance. 

Dave

Hi dave, thanks for your reply.

For current measurement through CT using single burden but measurement method is same as differential, so how it is related to common mode rejection. Please find below snap for circuit for reference.

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.

Dave

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.

Dave