Getting commun mode voltages on the ADC two cables

[tlichmo]

Hi,
An ADC is connected (at its input) to a pair of cables.
At the output of the ADC, we have the differential mode voltage (quantized).
Is there any ticks to get, separatly, the voltages (commun mode voltages) that the ADC has received on each of the two cables,
Best Regards,

 

[nus_lin]

sum them up

 

[tlichmo]

Thank you for your reply.
But I think I have not well asked my question.
As communly used, the adc gives the quantized differential voltage Vd between two wires w1 and w2. My goal is to have the common mode voltages Vw1 (between w1 and the ground) and Vw2 (between w1 and the ground). My question is: is this information can be provided by the adc?
Thank you in advance,

 

[erikl]

... the adc gives the quantized differential voltage Vd between two wires w1 and w2. My goal is to have the common mode voltages Vw1 (between w1 and the ground) and Vw2 (between w1 and the ground). My question is: is this information can be provided by the adc?

It can; but only if you connect the inputs appropriately (as stated above by you).
You can achieve this by (timely serial) analog multiplexing of the inputs.

 

[tlichmo]

Ok, thank you very much.