Forum Discussion
Altera_Forum
Honored Contributor
8 years agoNo it's probably not find but it is very dependent on your application. You need to evaluate the dynamic supply current on each power rail to determine a target impedance and then choose a distribution of capacitors to reach that target impedance over the whole application frequency range.
To find out the dynamic supply currents, if you already have an complete FPGA project compiled in Quartus, you can use the results of the power estimator. If not there is an excel sheet that can give you a power estimation here: https://www.altera.com/support/support-resources/operation-and-testing/power/c10-lp-power-estimator.html Once you have your currents there is a tool that will help you determine what capacitor distribution you should use. Have a look here: https://www.altera.com/support/support-resources/support-centers/signal-power-integrity/power-distribution-network.html