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Original question:

MSPM0-ANALOG-CONFIGURATOR: MSPM0 Analog Configurator - How to ADC with OPAmp?

MSPM0-ANALOG-CONFIGURATOR: About Data GUI plot sampling rate

James NAM
Prodigy 85 points
Part Number: MSPM0-ANALOG-CONFIGURATOR

Tool/software:

Hello Team,

I have some issue while using ADC function in the Analog Configurator.

I'm using LP-MSPMG03507 and set ADC sampling rate to 4SMPS.

And I applied a 30Hz Sawtooth wave and tried to see result on data section in Analog Configurator.

However, I noticed following issues:

1.The graph can display only up to 200 samples at a time.

2. Despite sampling a 30Hz signal at 4SMPS, I am only getting around 50 samples per cycle (which corresponds to 30Hz*50samples = 1500SPS)

3.I also changed ADC sampling rate to 256 SPS, but same 1500SPS in graph.

Could you please advise on how to resolve this?

Thank you!

James Nam

  • +1
    TI__Mastermind 25620 points

    Hi James,

    That is a limitation of the tool, the ADC is sampling that fast but there is no buffer created, the UART isn't going 4MSPS (I believe it is set to 115200). The tool is created to help you get a quick demo but it does have limitations. UART is not a peripheral that can go fast enough to send data at 16Mbps.

    Regards,
    Luke