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AD9744 Test questions

Hi all.

I have some questions about AD9744.

1.  Table 2 in the AD9744 datasheet, is the test condition AMPLITUDE 0dBFS?

 

2.  Whether these indicators in Table 2 can be satisfied for both LFCSP packaging and TSSOP, especially when the sampling rate is 210MSPS;

 

3.  Test method problem, the input impedance of the instrument is 50 ohms, the transformer is 1: 1, why the output resistance of AD9744 is two 50 ohms, should it be two 25 ohms?