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Explorer II
January 19, 2024
Question

DAC in MCP2221

  • January 19, 2024
  • 1 reply
  • 1028 views

Hi to all!

I am trying to generate an analog signal using a DAC that is built into the MCP2221 controller. The problem is how do I control the output current? Maybe there are some schemes or built-in capabilities in the MCP2221 controller? Is it enough to simply put a current-limiting resistor?

I will be grateful for the answer!

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    1 reply

    Super User
    January 19, 2024

    Voltage is provided, current is taken. What you connect to the DAC dictates how much current is drawn.

    Typically, the voltage source has the capability of providing enough current to satisfy the needs of the load, whatever it is. A current limiting resistor can be helpful in some cases, like with powering an LED.

    The correct solution will depend on what you have connected as a load.

    Explorer II
    January 19, 2024

    Thank you for the answer!