ADF4350 Not locking to required frequency

Hi,

I've checked your schematic and simulated your loop filter in ADISIMPLL. It looks okay. 

It would be good to check your reference is valid or not. Can you set MUXOUT to R divider output and probe it to see if the output matches with your reference frequency? 

Kudret

HI,

We checked that to.. When Muxout is set to R divider, MUXOUT stays always high.. When we check MUXout to N divider than also it stays high.. When we set MUXOUT to GND than it shows low.. But we didnot exactly understand how to decode MUXOUT output? Datasheet doesnot have any info on reading MUXOUT pin..

Hi,

After setting MUXOUT to R Divider output, can you write to Reg0? You should be able to see R divider output with this? If not, then there is a problem with your reference.

Kudret

Hi,

Do you still have this issue ?

Kudret

Closed out from lack of activity