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ADS127L18EVM-PDK: ADS127L18

Avner Ezion
Prodigy 120 points
Part Number: ADS127L18EVM-PDK

With 8 channels at maximum simultaneous conversion rate, can the EVM with PHI board continuously transmit, stream the data to USB and to the PC or is there a memory size limit to the burst of sampling? 

Have a nice weekend

Avner

  • 0
    TI__Mastermind 46310 points

    Hello Avner,

    The ADS127L18EVM does not support continuous data streaming.  Data is stored on the PHI board, which has limited memory, and then transferred to the PC over USB at lower speed.  I believe the maximum sample size is 1MB.

    If you need continuous streaming, then an external FPGA or MCU development board that can interface directly to the ADS127L18EVM would be needed that has the necessary resources.

    Regards,
    Keith Nicholas
    Precision ADC Applications

  • 0 in reply to Keith Nicholas
    Prodigy 120 points

    Hello Keith
    Thank you for the enlightening response.

    As I understand it, the limitation is in the amount of memory on the PHI board.

    I assume too, that the mating connector as " a standard pinout " mates with many ADC's and FPGA's.

    Will a TSW1400EVM with 1GB memory be sufficient for grabbing data for at least 5 seconds from ADS127L18EVM?

    Or can you recommend a similar mating bord for such an application?

    Thank you

    Avner

  • 0 in reply to Avner Ezion
    TI__Mastermind 46310 points

    Hello Avner,

    The mating connector is not a standard pinout.  For debugging purposes, you can jumper between the ADS127L18EVM board and a suitable data capture card, but this approach will limit the maximum clock rate due to signal integrity concerns.  For full speed performance, a custom transposer board would need to be designed to go from the ADS127L18EVM PHI connector to whatever connecter is used on the data capture board.  In both cases, full custom firmware/Verilog code would need to be written to get the data capture card working with the ADS127L18EVM.

    Yes, the limitation is the amount of memory on the PHI board.  Something like the TSW1400EVM with 1GB of memory would be sufficient to capture 5 seconds of data at the maximum data rate of the ADS127L18EVM (you would need around 163MB of memory in this case).

    We do not have anything available to capture this much data using the ADS127L18EVM without quite a bit of extra engineering development work.

    Regards,
    Keith