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CDCLVD1204: 时钟输出幅值

Part Number: CDCLVD1204
Other Parts Discussed in Thread: TMS320C6678

CDCLVD1204从手册P5看出Vpp为250-450mV,实际测试为200mV多点,测试结果见下图,

原理图见下:

问题:

1. 输出负载端是TMS320C6678,AC耦合,测量TMS320C6678 时钟P/N两端是114Ω,请问该设计有无问题?

2. 输出的幅值为何偏低?