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ADC12DJ4000RF: Lane rate calculation

Noah B
Prodigy 10 points
Part Number: ADC12DJ4000RF

Tool/software:

Hello, I was hoping someone could double check my lane rate calculation. I want to use the ADC12DJ4000RFEVM with an Agilex 5 development kit. So I am limited to 8 JESD204C lanes.

I see table 7-23 in the datasheet specifying N' = 12, M = 4.

So if I were to sample at the max sample rate of 8gsps (single channel),

with lane rate = ((M * N' * Fs) / L ) * 66/44 = ((4 * 12 * 4000000000) / 8) * 66/44 = 24.475 Ghz

Is my assumption correct that sample rate is still 4000Mhz due to it being two interleaved channels?

And that this would not be possible in this setup as the device has a max rate of 17.16Gbps?

Thanks

  • 0
    TI__Expert 6150 points

    Hi Noah,

    In this table there is a serialization factor provided for each JMODE, this is the R parameter which is equal to Fbit/Fclk for that mode. So if we multiply R*Fs we will get the lane rate the JESD lanes will be operating at. In this case it is 3.3*4 = 13.2 Gbps.

    Thanks,

    Eric