Volts to SDI-12

Discussion in 'Electronics Resources' started by ChinaBuck, Mar 18, 2013.

  1. ChinaBuck

    Thread Starter New Member

    Mar 11, 2013
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    Is the an IC that reads volts and transmits SDI-12?
     
  2. Papabravo

    Expert

    Feb 24, 2006
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    Maybe. Tell us what SDI-12 refers to. I think you're talking about an Analog to Digital Converter with an interface to a microcontroller. If that is true, then we need more details, like what kind of voltage range, and how many bits, and what kind of frequency components are we talking about.
     
  3. ChinaBuck

    Thread Starter New Member

    Mar 11, 2013
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    SDI-12 is Serial Data Interface at 1200 baud. The sensor outputs 0-5 VDC, have a 5VDC power source.
    Does this help? Frequencies less than 1Hz
     
  4. Papabravo

    Expert

    Feb 24, 2006
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    So you need an A/D Converter that has a 0 to 5 Volt range. Any microcontroller can do serial data transfer at 1200 bit/second. If the highest frequency component in the input is 1 Hz. then the minimum sampling rate wout be twice per second or every 500 milliseconds.

    I'm pretty sure there are no standalone A/D converters that will handle the serial interface directly.
     
  5. ChinaBuck

    Thread Starter New Member

    Mar 11, 2013
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    Thanks for coming back.
    I found the MCP3202-CI/P that claims 12 bit dual channel serial output.
    I will look at this one.
     
  6. Papabravo

    Expert

    Feb 24, 2006
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    That chip is an A/D converter, but it has an "SPI" interface. That is a bit of a different animal than you asked for in your original post (SDI-12). If SPI is what you want then fine, but if your original posts lack the necessary precision you should not be surprised at the hit or miss quality of the responses.
     
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