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Question about ADF4159 Loop Bandwidth

Question asked by on Jul 8, 2014
Latest reply on Aug 12, 2014 by

Hello sir:


I test about ADF4159 EVB, but found a question need your help.

Based on the ADIsimPLL simulation result (the design data loaded from AD4159 EVB CD),
the Loop Filter values should being 230 KHz Loop Bandwidth, which the same as
the schematic of AD4159EVB (refer to the G-383; the Evaluation Board User Guide).

But the Loop Filter is not 152 kHz that I mentioned the in Table1, Page4 of UG-383.
(Please see the attached file.)

Please help take a look and see any mistake in the setting of AD4158/9 PLL Software.

Thank you!