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Connections to ground on HMC408

Question asked by electrosoni on Jul 12, 2018



HMC408 has no ground pins and the package base has to be connected to ground. Since this device has several N/C pins,

I am wondering if those pins do not have kind of internal connection and I could connect them to the exposed metal ground. 

As far as I see on  the gerbers of the evaluation board, it seems that some of them are used this way (pins 2,4,6,8,12,13 and 15). Is that correct? Could I use those pins to make more easy the connectios to ground? Why not pins 5 and 7?