external ADC interfacing with MSP430F6736

Discussion in 'Analog & Mixed-Signal Design' started by keval.desai, Jul 12, 2018.

  1. keval.desai

    Thread Starter New Member

    Jun 1, 2018
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    I want to interface an external ADC (ADS1231 24-bit) with MSP430F6736 to read analog data and display it on a screen (monitor).
    I have a MSP-FET (Flash Emulation Tool) and a MSP-TS430PZ100B 100 pin target board.
    I want to read analog data (voltage) and display it on the screen.
    What steps do I need to follow?

    Thank you.
     
  2. danadak

    Well-Known Member

    Mar 10, 2018
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    Just a thought, but there are parts out there, UPs, that have hi res onchip
    A/D (20 bit) + Reference + ARM core + lots of other stuff like LCD interface -

    upload_2018-7-13_7-47-38.png


    Note A/D has differential input to handle bridge sensors.

    Regards, Dana.
     
  3. danadak

    Well-Known Member

    Mar 10, 2018
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    What is the screen ? PC or LCD ?

    In general your processor has to implement the two wire interface to A/D,
    and then if PC is display device some code, like Python, to display the
    data. If specifc LCD incorporate a library in code base to handle it.

    Regards, Dana.
     
  4. keval.desai

    Thread Starter New Member

    Jun 1, 2018
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    Hey Dana,
    The screen is a PC.
    Will I be able to generate a text file or an excel file to record the data using C?
     
  5. MrChips

    Moderator

    Oct 2, 2009
    16,730
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    The MSP430F6736 already has an 8-channel 10-bit 200ksps ADC and a 24-bit sigma-delta ADC.
    Why do you need an external ADC?
     
  6. keval.desai

    Thread Starter New Member

    Jun 1, 2018
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    this is an experiment and I want to try interfacing an external ADC.
     
  7. danadak

    Well-Known Member

    Mar 10, 2018
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  8. danadak

    Well-Known Member

    Mar 10, 2018
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    Look at all vendors very carefully at end to end signal path errors,
    not all A/Ds and G elements are equal in their inaccuracy specs.

    PSRR, T, Power, Noise, non linearity.......

    Attached a basic ap note on error sources, Analog Devices has many
    other sources of discussion on this topic.

    Regards, Dana.
     
  9. keval.desai

    Thread Starter New Member

    Jun 1, 2018
    15
    0
    Thanks Dana.
    I'll look into the material and get back to you if I've any further doubts.

    Thanks again.
     
  10. keval.desai

    Thread Starter New Member

    Jun 1, 2018
    15
    0
    Hi Dana,

    I have moved on from interfacing external ADCs to using the internal ADCs for conversion process.
    I have finished the coding for it but I am stuck on storing/exporting the data to an excel sheet.

    Could you help me out with a way to export the data into an excel sheet?

    Thanks,
    Keval
     
  11. danadak

    Well-Known Member

    Mar 10, 2018
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