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AD9958 Grounding and Supply Question

Question asked by Engr.for.Radio.Astronomy on Jul 3, 2012
Latest reply on Jul 13, 2012 by JLKeip

Thanks for your help in advance. I have two somewhat related questions:

1. The 9958 has a ground slug on the backside. The data sheet says this must but attached to ground but fails to mention which ground: analog or digital?

2. Previously I saw either an AD application note  or posting on this forum about driving both Analog and Digital supply ports using a single shared supply with reasonably good results. For the life of me I can't find this anymore. Can you direct me to this information?