Can AD5685R use 4.096V or 2.048V external reference ?
My customer would like to use AD5686R for 14bit, 4ch and small package at 4.096V full-scale.
The datasheet says that impedance of REF pin is very low and the internal reference 2.5V is enabled at default setting.
So, I thought that the device may be damaged using external reference except 2.5V.
When I check the thread at EZ I found below as description of above my concern.
( I think that AD5686R and AD5685R is the same reference circuit)
But the external reference circuit of AD5686R evaluation board can input 2.5V and 5V to AD5686R.
Actually can AD568xR series be supplied at 2.048V or 4.096V ?
Please let me know your advice.
Yes you can use 2.048V and 4.096V external references.
Please check these thread, should be applicable to your case too: