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ADC12DJ3200: Max data bandwidth and recommend JESD mode

Lacey Lin
Intellectual 2900 points
Part Number: ADC12DJ3200
Other Parts Discussed in Thread: TSW14J57EVM

Hi team,

According to the table, it means the maximum bandwidth the ADC12DJ3200 is 6.4/2=3.2GHz. Correct?

And my customer want to use the ADC12DJ3200 EVM and TSW14J57 EVM to capture the signal with 2.4G bandwidth and the 6.144Gbps serdes rate,

Which JESD mode is recommended?

Lacey

Thanks a lot!

  • 0
    TI__Mastermind 44680 points
    Hi Lacey
    To achieve 2.4 GHz bandwidth they will need to use JMODE0 or JMODE1. The keep the serial data rate below 6.144 Gbps will require using JMODE1 where the serial rate is equal to 2x the input CLK rate.
    I would recommend using a clock rate of at least 3 GHz. This will give a sample rate of Fs = 6 GSPS and a serial data rate of 6.0 Gbps. The resulting Nyquist bandwidth is 3 GHz, which will give some margin for anti-aliasing filters to block out-of-band signals from interfering.
    The input signal will need to be centered inside one of the following frequency bands:
    DC to Fs/2
    Fs/2 to Fs
    Fs to 3Fs/2
    3Fs/2 to 2Fs
    Some adjustment of Fs can be made to help align the signal frequency range within one of these bands and still ensure that Fs/2 is greater than 2.4 GHz.
    I hope this is helpful.
    Best regards,
    Jim B
  • 0 in reply to Jim Brinkhurst1
    TI__Intellectual 2900 points

    Hi Jim,

    Sorry for my mistake of the information.

    The input signal bandwidth is 2.4G and the 6.144G is the sampling rate.

    So it means the clock need to be 6.144/2 GHz. Right?

    and i can just the JESD mode1 to test with TSW14J57. Right?

    Lacey

  • 0 in reply to Lacey Lin
    TI__Mastermind 44680 points
    Hi Lacey
    That is correct.
    JMODE1 with clock at 6.144/2 GHz will give 6.144 GSPS sample rate.
    TSW14J57EVM supports this mode and sample rate.
    Best regards,
    Jim B