Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

how to connect analog input directly to FPGA Altera board?

hi; I want to implement Sigma Delta ADC on Altera DE1, i wrote the code and run on QuartusII; now i want to know is it possible to connect the analog input directly to the board? as in my co...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Althoug Cylone II has differential LVDS receivers, they don't have a specified common range that would be well suited for the intended purpose. Thus an external comparator would be the preferred solution. On the other hand, I guess that the X competitor's LVDS inputs don't have a considerable better common mode specification and the said eval board SD ADCs rather depend on typical data than specified behaviour.