Hi Jack,
AFE5809 is 65MSPS. Regarding the LVDS I understand you mean deserializer. I'm not an expert on Altera FPGA's, I use Xilinx. I think you should ask this question on Altera forum. However, take a look at this link:
http://analogdigitallab.org/sites/default/files/xapp866.pdf
Best Regards,
Mariusz