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ADS8681EVM-PDK: Issue with Conversion when Connected to LNA

David Tandri
Expert 1355 points
Part Number: ADS8681EVM-PDK

Hi,

We are using ADS8681EVM-PDK to convert Low Noise Amplifier (LNA) board output to digital input.

The conversion was happening fine for the first 15 mins. However, when we let the software run continuously for around 15 mins, we were not able to see any conversion on the GUI display.

Apart from that, we are also facing intermittent problem. For example, the conversion result was as expected and sometimes the conversion result was not right.

I have attached here the software configuration.

What is the possible cause for this issue?

Any help is much appreciated

Thanks

  • 0
    TI__Mastermind 33020 points

    Hi David,

    Have you seen any error reported by the GUI when you were not able to see any conversion data in the GUI? Did you have to restart the GUI to recover?

    Can you please use the VTH(4V) or VTL(1V) precision DC signal on the J5 for test purpose? make sure your LNA board is disconnected and also one jumper is installed on the pin 7-8 of J5. Also reduce your samples in the time domain page to a small number.

    Best regards,

    Dale