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DAC38RF82: 81180 9G模式无法正常输出(81180 9G mode cannot output)

Part Number: DAC38RF82


请问在我自己的板卡上,配置DAC38RF82 81180模式,8G采样率可以输出,但9G无法输出。可否告知我大致分析方向呢?配置如下:

DAC38RF82 81180 9G模式下无法输出。使用内部PLL,输入时钟281.25MHz, N=1,M=8,VCO=9000MHz

DAC38RF82 81180 8G模式下却可以正常输出,使用内部PLL,输入时钟250MHz,N=1,M=8,VCO=8000MHz