Forum Discussion

Nicole04's avatar
Nicole04
Icon for Occasional Contributor rankOccasional Contributor
1 year ago

Agilex 5 FPGA Core Supply (Speed Grade)

Good day, I will initially use a -4 speed grade Agilex 5, E-Series, Group B device and then later on transition to a -6 speed grade option. The power supply I want to use can generate a maximum of 7...
Power
RFrac's avatar
RFrac
Icon for New Contributor rankNew Contributor
1 year ago

I think that you are risking some weird calculation bugs by undervolting the device.

Table presented by Fakhrul is for a SmartVID device, so it's not for the device you're using. Also for SmartVID voltage regulator must be capable for outputting 0.7 to 0.9 V as requested by FPGA.

For 4S device you need to have 0.8 V nominal voltage that could drop to 0.776 V minimum. This minimum includes voltage regulator accuracy, voltage ripple and ac transient under load pulse. So even if your regulator could do 0.776 V you will not have any margin for transients and accuracy. See the Power Distribution Network Design Guidelines for Agilex 5.