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Altera_Forum's avatar
Altera_Forum
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16 years ago

Interfacing to S4/S3 LVDS

Hi All, I would like to interface an ADC that has a Vocm of 820mV at 780Mbps to the S4 LVDS receiver. The S4 data sheet has the Vicm at: 0.05V < VICM < 1.8V for Dmax less than 700Mbps a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

What's the involved ADC type? The Vocm specification seems surprizing, because it doesn't meet the general LVDS specification. Strictly spoken, it shouldn't be designated LVDS. Depending on the transmitter and signal characteristic, there should be ways to perform a level shifting. At wost case, LVDS repeaters can be used.