Forum Discussion
Honored ContributorPCB Design Guidelines
I am planning to design a Cyclone III board for a storage system. How do I determine the decoupling capacitor needed to accommodate the core power and IO switching characteristic? By the way, how can I determine the Core and IO current consumption? Is there any recommendation on power supply design, for example like choosing between LDO and switching regulator? I couldn't find any recommended decoupling capacitor in the handbook. Has anyone done any FPGA board design can advise here?
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Altera_ForumAdditionally, if you're in the San Jose region, you can attend Altera's free transceiver workshop:
http://www.altera.com/sjworkshop where you will learn how to design for serial links and use board design tools.- Altera_Forum
Hello
In case of ceramic SMD capacitors use with dielectric X7R or NPO (sometimes called COG). These determines bahavior of capacitor for different temperature, but additionaly these capacitors have higher self resonant frequency which determines when capacitor acts like coil. Below some materials. http://www.murata.com/emc/knowhow/pdfs/te04ea-1/12to16e.pdf Best regards - Altera_Forum
In addition, you can use Altera Early Power Calculator tool to estaimate the current consumption of your design.
- Altera_Forum
Thanks Wizard. That website is really informative.
- Altera_Forum
Try the following link
www.altera.com/board (http://www.altera.com/technology/signal/board-design-guidelines/sgl-bdg-index.html) It has very good general board design guidelines and will provide some insight into the choice of decoupling capacitor Also at the back of the following document there are design guidelines for board layout for a Cyclone III device http://www.altera.com/literature/dp/cyclone3/pcg-01003.pdf Hope this helps
