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…

Hi, 

There are 2 RF outputs for ADF4356. Can the 2 outputs be 2 independent freq or they have to be multiples of each other?

For example, can the 2 freqs be 2.4 and 3.4?

Rgds

I'm using ADF4356, but unfortunately I couldn't get any output signals yet. The phenomena are that: Voltages on the power pins and ground pins are correct, but no output signals on RFout pins. Besides, I set the MUXOUT as DVdd out, but the actual…

 Hi , 

I am trying to use ADF4356 in the following configuration , please let me know if there any mistake . 

As ADF4356 is not able to lock .

RFout=399.9MHz

VCO Div=16

Ref=13.75MHz

Pfd=50kHz

R=275

INT=7998

Thanking you 

With best regards and wishes 

On page 18 of the ADF4356 datasheet: "When the prescaler is set to 4/5, the maximum RF frequency allowed is 7 GHz." So above that frequency the prescaler should be set to 8/9.

However the VCO frequency range for the ADF4356 is only 3.4 to 6…

At present, i want to use your company's phase-locked loop chip ADF4356 to generate a fixed frequency of 137.37MHz, reference frequency is 50MHz.
      When the parameter MOD2 is calculated from the datasheet of the ADF4356: MOD2=fPDF/GCD(fPDF,fCHSP), (datasheet…

Hello
    There is a question about ADF4356.
    In the datasheet of ADF4356,I want to know how to realize much faster lock time than those detailed in the datasheet.

Hi,

I would like to know, if I use ADF4356 as a Clock generator for AD9684 as in below image, is it OK? or do you have any recomendation ?

I am using ADF4356 and want to drop CE at times to reduce power consumption. Having previously programmed all registers, I need to know if the all the internal registered have to be programmed again after raising CE. My tests suggest that the registers…