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Altera_Forum
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10 years ago

1.8V LVDS inputs

Hello, I am using a Cyclone IV EP4CE15 FPGA and I need to accept 1.8V LVDS inputs from an image sensor. (100R termination, 150mV voltage swing, 0.9V common mode voltage). I am unsure how to d...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Are you sure the common mode voltage out of the sensor is 0.9V? Table 1-20 in the Cyclone IV data sheet gives the LVDS specs. If your data rate is < 700Mbps then a common mode voltage (Vicm in the table) of 0.55V to 1.80V is allowed. If your data rate is > 700Mbps then 0.9V is out of range.