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ADC12DJ3200EVM: Synchronously Sampling 2 Channels at a Wide Bandwidth

Robert Morain
Prodigy 10 points
Part Number: ADC12DJ3200EVM

Hi TI Engineers,

My name is Robert and I am a student at Brigham Young University. My group and I are working on a project where we need to synchronously sample at least two channels. We need to capture all signals from 100 MHz to 6 GHz. We are planning to purchase a couple of your ADC12DJ3200EVM boards to experiment with. 

I was wondering if you thought this was the best ADC to accomplish what we are trying to do or if you would recommend another one.

Another question is what frontend you would recommend for this board.

Thanks!

Robert

  • 0
    TI__Mastermind 44680 points

    Hi Robert

    The ADC12DJ3200EVM can sample at up to 6.4 GSPS in single input mode. The on-board baluns are rated for 500 kHz to 9 GHz. The ADC Full-power input bandwidth in single input mode is DC to 7.9 GHz.

    If you have two boards operating at slightly different sample rates you could capture the entire frequency range you are interested in. Here is one possible scenario:

    Board 1: Fs = 6.4 GSPS. Fin coverage from 100 MHz to 3.1 GHz (allows 100 MHz from upper signals to Nyquist boundary for filter rolloff).

    Board 2: Fs = 6.0 GSPS. Fin coverage from 3.1 GHz to 6.0 GHz (allows 100 MHz from 3 GHz Nyquist boundary to the 3.1 GHz highpass filter cutoff)

    You could use connectorized lowpass and highpass filters along with an RF splitter to route a single RF signal to the INA input terminals of both ADC EVMs.

    You may need to use a low noise amplifier (LNA) to boost your signal to provide better system SNR.

    Best regards,

    Jim B