The MCP4725 Digital to Analogue converter

Often we need analogue signal levels or synthetically produced (program controlled) signals to drive external devices. The Digital to Analogue Converter (DAC) is a device that accepts a digital value and converts it to an analogue signal level and the MCP4725 is such a device accepting a 12 bit digital data word and converting it to a signal level between 0V and Vcc.

This is how it physically looks like:

Since this device has an I2C interface it is easily programmable from the Raspberry Pi. In addition there is a nice description on how to use it on the Raspberry Pi. Since they use Python for their code we will have to convert their Python code into C.

-- Uli Raich - 2017-09-27

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