In order to better use ad9694, a small demo board was made according to ad9694-500ebz. But the bottom noise of the board was about-98dbc (without analog clock and empty mining). In the same case, the bottom noise of ADI ad9694-500ebz board was about-115dbc. The power supply voltage is checked to be consistent with the voltage of ad9694-500ebz (the power noise is about 50mV). What is the reason why the bottom noise of the board ad9694 made by ourselves is so high?