how can i apply a DC input in a differential pipeline input ADC

[alimjoco]

guys,

Is anyone knows how to properly bias a pure DC component in a differential input of an ADC? Is there a need such as floating source volateg condition or common mode reference?

 

[dhaval4987]

not sure if understood correctly... you want to provide input to the diffpair? or do you want to bias the diff pair?

for common mode voltage, you can use the AC voltage source and it also has a parameter named 'DC level'. if you specify that DC level, then the AC will be mounted on that DC level...
however, you will need to CMFB circuit to make it work better.

 

[alimjoco]

thanks.Instead of AC, i want to have a dc coupling to the input of adc..I want to supply a DC level on the differential input of the ADC. What is the proper way?