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Altera_Forum
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18 years ago

Vref power source?

I’m trying to decide if I can get away with a simple voltage divider for my vref pins. Any advice?
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

We've successfully done both styles -- a dedicated vref supply, or a 1K pullup/pulldown on the VREF pins for that bank. This tends to be the individual designer's preference. Altera's Stratix II GX PCI Express dev kit board uses a regulator for generating VTT for a DDR2 interface and this regulator has a VREF output (TPS51100DGQ).