This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ADS8860EVM-PDK: DAC9881EVM

Part Number: ADS8860EVM-PDK
Other Parts Discussed in Thread: DAC9881EVM, ADS8860, DAC9881

Subject: Communication, Data Logging, and DAC-ADC Sweep Evaluation for DAC9881EVM & ADS8860EVM

Dear Team,

I am evaluating two TI boards:

1. DAC9881EVM – I want to know whether this board can be directly communicated with using a standard I²C/SPI adapter (such as Aardvark or similar) If yes, could you please share any documentation or examples for the required connections and protocol details?

2. ADS8860EVM – This comes with the PHI controller board.

Can I connect the PHI board to a PC via USB and use the TI GUI for configuration and data capture?

Is it possible to export the captured ADC sample data from the GUI into Excel, or alternatively, access the converted data directly using Python (for example, through an API or by reading a data log file generated by the GUI)?

The ADS8860 datasheet shows SPI pins such as SCLK, CONVST, etc. Does this device support communication with a standard SPI master (without the PHI board) if I want to directly interface it with another microcontroller or SPI adapter?

3. Evaluation plan – DAC to ADC sweep

I would like to perform a linear voltage sweep test where:

The DAC9881 generates a step voltage output.

The ADS8860 samples the DAC output at each step.

After the ADC captures the value, there is a short wait/delay before the DAC increases to the next step

This process repeats so that ADC digital outputs correspond to each DAC step.

Could you please suggest how to set up communication and proper timing control for this synchronized DAC-to-ADC measurement, preferably using the provided EVMs and available TI tools?

Thanks in advance for your clarification. 

  • Hi Saikumar,

    1. looping in the DAC team
    2. Yes, the ADC GUI make be used for configuration and data capture. You can right click the plot and export to csv.
      1. You may use this device with other MCUs. You may refer to section 9.4.1.3 of the ADC datasheet.
    3. If you take a large number of samples when capturing ADC data, you should be able to see a few DAC steps. As the GUI does not facilitate true continuous capture, you will need to take a number of captures.

    Best regards,

    Samiha

  • Hi Saikumar,

    1. Yes. I do not have additional documentation beyond the DAC datasheet and EVM user's guide. The user's guide (page 20) has a schematic that shows the pinout of the EVM where you would want to connect the external controller SPI signals to the EVM. The protocol details are in the device datasheet. 

    Best,

    Katlynne Jones