Time interleaved AD9213

Hi,

I design a system with 10GHz input bandwidth and I need a 20GSPS ADC. So can I achieve 20GSPS by time-interleaving 2 ADC9213?

Is there any limit with AD9213 that makes it impossible to interleave? For example, the limit input bandwidth of ADC9213 (just 6.5GHz).

Thank you!

  • 0
    •  Analog Employees 
    on Jul 1, 2021 10:35 PM

    Hi,

    Thank you for your interest in AD9213.

    Theoretically I believe that time-interleaving 2 AD9213s is possible. As you mention, the input bandwidth of 6.5GHz would limit the ability to utilize the full Nyquist bandwidth.

    I believe that the input bandwidth of the AD9213 is greater than 6.5GHz. We hope to be able to demonstrate that sometime soon but until we do, the datasheet value of 6.5GHz is what we can count on.

    Thanks,

    Doug

  • I'd be very interested in 'how' an input BW beyond 6.5 GHz is possible. My measurements show that there is quite a large mismatch above 6.5 GHz. If you have anything to share on it, I would be very interested as that would make 2nd Nyq. much more useable.

    Thanks,

    -Sam

  • 0
    •  Analog Employees 
    on Aug 27, 2021 3:18 AM in reply to SamS

    Hi Sam,

    I think mismatch at/by the balun, parasitic loading of the analog input traces (which are quite long on the current evaluation board) and overall mis-matching to the ADC inputs all contribute to the input bandwidth measurement.

    I cannot prove it to you at this moment, but we hope to have some data in the future.

    Thanks,

    Doug