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您好!对于评估板上供电问题,请参考产品线工程师下面描述。We found the combination below to give the best noise and spurs (on that board).The reason for this may have been that The SDVdd, Vp, DVdd, AVdd do not take a lot of current, whereas the other two do (VVco,Vout). Since power supply noise increases with regulator current draw, We separated these supplies. It was then found that best spurs were found by tying the SDVdd, Vp, DVdd, AVdd to VVco regulator and and not Vout.However, with the new board layout and new regulators, it was found that either combination was fine. |
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