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AD7280A current value at Master or Slave

Question asked by moto on Oct 7, 2014
Latest reply on Oct 10, 2014 by moto

Hi

 

3 AD7280As serial daisy chain connection, like Figure 29 of datasheet Rev0 p18/48.

I would like to control the voltage of these 3 cells similarly.

But the current value was different.

Master,bottom,< Slave, top < Slave, mid.

 

1: Why do three devices become a different current value?

2:Can we calculate or measure each device current value when these are communicating?

3: Is the difference of current between Master and Slave the current of communication lines ?

  What is the cause of this difference?

4: How to control the current of these cells similarly.

5: Can we know these current variation? ,min & std div.

 

Regards

moto

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