UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

cancel
Showing results for 
Search instead for 
Did you mean: 
Adventurer
Adventurer
642 Views
Registered: ‎10-26-2017

RFSoC RF ADC Full-Scale Range

Jump to solution

Is it possible to adjust the full-scale range of the ADC? PG269 (RFSoC FR Data Converters) details over-range protection methods, as well as programmable amplitude thresholds, but I don't see anything about actually altering the FSR.

-Dan

0 Kudos
1 Solution

Accepted Solutions
Moderator
Moderator
631 Views
Registered: ‎04-18-2011

Re: RFSoC RF ADC Full-Scale Range

Jump to solution
Hi Dan,

ADC analog input range is 1Vpk-pk differential.
This is the full scale of the ADC at which point you get the over range asserted.
You can't adjust the full scale of the ADC internally.
The pg269 document suggests a scheme for using the threshold flags to implement an AGC(automatic gain control) loop to keep your input inside a predefined envelope by controlling the gain of the LNA in the RF line up.
-------------------------------------------------------------------------
Don’t forget to reply, kudo, and accept as solution.
-------------------------------------------------------------------------
1 Reply
Moderator
Moderator
632 Views
Registered: ‎04-18-2011

Re: RFSoC RF ADC Full-Scale Range

Jump to solution
Hi Dan,

ADC analog input range is 1Vpk-pk differential.
This is the full scale of the ADC at which point you get the over range asserted.
You can't adjust the full scale of the ADC internally.
The pg269 document suggests a scheme for using the threshold flags to implement an AGC(automatic gain control) loop to keep your input inside a predefined envelope by controlling the gain of the LNA in the RF line up.
-------------------------------------------------------------------------
Don’t forget to reply, kudo, and accept as solution.
-------------------------------------------------------------------------