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question about ADF4355,ADF4356

Question asked by MaYongfeng on Mar 1, 2018
Latest reply on Jun 8, 2018 by kpeker

Inquiry Description:

Here are some questions about ADF4356.

1,When there is no REF clock input, it can also generate a RF output, but the frequency is not correct.

2, The Creg1 pin(pin25) has no voltage output,the Creg2(pin 32) output voltage is 1.89V. But in the datasheet, the norminal voltage is 1.8V.  Is this chip OK? Or is it damaged?

3,In addition, in the other almost identical circuit, the ADF4356 has no Creg1 output either, but it seems that it works well.

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