Speed grades and timing analysis models

[DNguy4]

Hi,

I understand that Arria 10 has 3 speed grades (1, 2, and 3) and I am using a -2 part 10AS066H3F34I2SG. However, I see 4 timing models in the Quartus timing analysis tool (fast 900mv 100oC, fast 900mv -40oC, slow 900mv, 100oC and slow 900mv -40oC).

Do you know which model is appropriate for my part above?

Thanks

[AndyN]

All four are applicable to the part. The fast/slow represents the range of silicon that they have bundled as a -2 part and the 0C/100C represents the change in performance (i.e. switching speed) across temperature. In order to be reliable, your design needs to meet timing at all four timing corners.

Hope that helps,

Andy

[DNguy4]

thanks