gavin23
Junior Member level 3
Hello:
How would I convert LVDS to CML? I've already done a Google search and read appnotes from Maxim & TI about interface conversion (see attached).
My problem is none of the appnotes explain why they do what they do.
Both AC couple when going from CML to LVDS. However, the Maxim appnote has two 5k pull-downs on the receiver side an the TI appnote shows a 10k pull-up and 10k pull-down on the negative leg. I understand in both cases this is for biasing but how did they come up with the solutions and why pick one over the other?
I have a 3.3V CML Clock Buffer and my receiver is LVDS with integrated 100R termination. The receiver doesn't say anything about its internal biasing. Currently I just use 100nF AC coupling caps with no additional biasing on the receiver end.
Any further insight on converting CML to LVDS would be appreciated.
Thanks,
Gavin
How would I convert LVDS to CML? I've already done a Google search and read appnotes from Maxim & TI about interface conversion (see attached).
My problem is none of the appnotes explain why they do what they do.
Both AC couple when going from CML to LVDS. However, the Maxim appnote has two 5k pull-downs on the receiver side an the TI appnote shows a 10k pull-up and 10k pull-down on the negative leg. I understand in both cases this is for biasing but how did they come up with the solutions and why pick one over the other?
I have a 3.3V CML Clock Buffer and my receiver is LVDS with integrated 100R termination. The receiver doesn't say anything about its internal biasing. Currently I just use 100nF AC coupling caps with no additional biasing on the receiver end.
Any further insight on converting CML to LVDS would be appreciated.
Thanks,
Gavin