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TSW54J60 Evaluation Module continuous data capture

Aditya Pandya
Prodigy 30 points

Other Parts Discussed in Thread: TSW54J60EVM

I am wondering if I can use this evaluation module (with TSW14J56EVM ) to continuously stream data to PC. Also, can the sampling rate on the board be set to any rate? My application is at a prototype stage and I need to sample a signal with a sampling rate of atleast 200MHz. 


Alternatively, if this cannot continuously stream data, what would be the maximum limit of data acquisition at full sampling rate (I believe it will be 2 seconds based on the memory limit). If there is another option where I can perform continuous measurements, please let me know. 

  • 0
    TI__Guru* 91947 points

    Aditya,

    The TSW14J56 cannot stream continuously data to a PC. You could increase the capture size to the max and capture 2G of samples then download this to the PC.

    If you plan on using the on-board clocking solution, you are limited in your choices of sample rate due to the frequency range of the internal VCO's and reference clock used by the LMK. If you are to provide an external clock, you can use almost any rate as long as they are within the range of the ADC data sheet. See section 5.1 of the TSW54J60EVM User's Guide regarding this.

    Regards,

    Jim

  • 0 in reply to jim s
    Prodigy 30 points

    Hello Jim, 

    Thanks for the quick reply. To your knowledge, is there any ADC evaluation kit that offers continuous streaming capability of at atleast 200MHz or higher with a bandwidth of DC-200MHz with user controlled sampling rates with a suitably high SNR? I need to continuously sample a photodiode with the aforementioned criteria. 

    Regards, 
    Aditya

  • 0 in reply to Aditya Pandya
    TI__Guru* 91947 points
    Aditya,

    Not that I know of. Could you try sampling your ADC output with a high speed DAC and use a spectrum analyzer to view the performance?

    Regards,

    Jim
  • 0 in reply to jim s
    Prodigy 30 points
    Jim,

    I need to keep the cost at a minimal level since I am still at a proof of concept stage and I need to save the data for post processing. I can do some triggered capture mode and might have some dead-time where I can offload the data from the memory onto a PC. Do you think in this case I can somehow modify the settings/code to get this done without data dropping over sufficiently long time intervals?