Other Parts Discussed in Thread: CDCM7005 Hi
I have TI's Excel spreadsheet PLL Calculations.xls to help me calculate Loop filter parameters. When I input the following:
Fc=1.2GHz
P=10 N=12
M=1
Fref = 10 MHz
Ko=70 kHz/V
I get an analyzed…
Dave,
Following screenshot shows the typical 1GHz input and output (LVPECL) signal of CDCM7005. (This is captured in buffer mode only. Input source is a signal generator and not capable to run in PLL mode.) Till 300k the output performance follows the…
Hi
From analysis done before I cam to design with this product I am looking at 420 mA at 3.3V for the part. How much is used by the Analog section. I am trying to size and procure a ferrite bead to clean up the Analog section.
Thanks
Hello Kawai-san,
the CDCM7005 VCXO input does accept very small swings down to 100mV differential.
If you can do AC coupling plus biasing you can connect LVDS directly to VCXO_IN.
Best regards,
Julian
Other Parts Discussed in Thread: CDCM7005 Hi,
The LVPECL output swing of the CDCM7005 is too large. I measure 1.5 V from one branch i.e. differentially 3 Vpp. Standard is 0.8 V. Is there settings which affect the swing? The outputs are AC coupled. Before…
Other Parts Discussed in Thread: CDCM7005-SP
Good morning,
Should the thermal pad on the CDCM7005-sp be soldered to the pad under the part? I see very good guidance for the part assembly for the non-flight version of this part, but haven't seen anything…
I want to switch oscillators due to footprint, but the new oscillator has the differential plus and minus swapped. Would this just invert the output from the 7005?
Thanks,
Todd
Hi
I have the spreadsheet for choosing the loop filter components. I am using the passive loop filter topology.
When I look at the datasheet Word 0 asks for the divider M and N (which I guess is P from the spreadsheet). Is this correct?
My Fref…
Other Parts Discussed in Thread: CDCM7005 , CDCM7005-SP 4111.CDCM7005.zip Hello
I wold like to ask you to review the below
M y cusotmer is testing CDCM7005 and she is facing with PLL Unlock problem and the below are staus for setting values. What…
