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ADF4112 R Counter output is not square wave

Question asked by huletlab on Jun 12, 2017
Latest reply on Jun 14, 2017 by Brigid.Duggan

Hi,

 

I am using EV-ADF411XSD1Z to test ADF4112. I use the onboard frequency reference(10MHz). When I check the R counter output at MUXOUT port. The signal is some spike waves instead of square wave(like the figue attached). And so as the N counter output. This makes my charge pump output pulse have very small interval. And the width-modulation almost doesn't have any effect. So after the loop filter the voltage is always high. Can anybody help me? I have been working on this project for several weeks... Thank you so much.

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