AD9558 Jitter Performance

Hi,

I have two questions about AD9558.

  • Is there any tool to estimate jitter performance of AD9558 with custom configuration?
  • If no, could you provide an estimation of clock output rms jitter performance with following configuration?
    • System clock (49.152MHz/ rms jitter = 3ps, Phase jitter (12k - 20M) = 0.3ps
    • Reference Clock 15.36MHz
    • Output Clock Frequency 156.25MHz

Best Regards,

Taiki

Parents
  • +1
    •  Analog Employees 
    on Mar 24, 2021 2:02 PM

    Hi,

    there is no tool to estimate the jitter performance of the AD9558 in a custom configuration.

    You can look at the Typical performance plots in the data sheet to get an idea. For example, the closest figure to your conditions is figure 7, that shows the absolute phase noise plot for a 161.1328125MHz output. You need 156.25MHz, which is pretty close.

    You can assume an AD9558 in your conditions will have this phase noise behavior.

    If this is a new design, I would suggest the AD9542 as the alternative. It should have better phase noise than the AD9558. See below the phase noise of an 155.52MHz output. I recommend using the AD9545 rev B data sheet as the proxy for the AD9542. They are from the same family and the AD9542 data sheet is still at rev 0 stage, while the AD9545 data sheet is at revB.

    Petre

Reply
  • +1
    •  Analog Employees 
    on Mar 24, 2021 2:02 PM

    Hi,

    there is no tool to estimate the jitter performance of the AD9558 in a custom configuration.

    You can look at the Typical performance plots in the data sheet to get an idea. For example, the closest figure to your conditions is figure 7, that shows the absolute phase noise plot for a 161.1328125MHz output. You need 156.25MHz, which is pretty close.

    You can assume an AD9558 in your conditions will have this phase noise behavior.

    If this is a new design, I would suggest the AD9542 as the alternative. It should have better phase noise than the AD9558. See below the phase noise of an 155.52MHz output. I recommend using the AD9545 rev B data sheet as the proxy for the AD9542. They are from the same family and the AD9542 data sheet is still at rev 0 stage, while the AD9545 data sheet is at revB.

    Petre

Children
No Data