adafruit_mcp4725 - MCP4725 digital to analog converter

CircuitPython module for the MCP4725 digital to analog converter. See examples/ for a demo of the usage.

  • Author(s): Tony DiCola, Carter Nelson

Implementation Notes


Software and Dependencies:

class adafruit_mcp4725.MCP4725(i2c, *, address=98)[source]

MCP4725 12-bit digital to analog converter. This class has a similar interface as the CircuitPython AnalogOut class and can be used in place of that module.

  • i2c (I2C) – The I2C bus.

  • address (int) – The address of the device if set differently from the default.

property normalized_value

The DAC value as a floating point number in the range 0.0 to 1.0.

property raw_value

The DAC value as a 12-bit unsigned value. This is the the true resolution of the DAC and will never peform scaling or run into quantization error.


Store the current DAC value in EEPROM.

property value

The DAC value as a 16-bit unsigned value compatible with the AnalogOut class.

Note that the MCP4725 is still just a 12-bit device so quantization will occur. If you’d like to instead deal with the raw 12-bit value use the raw_value property, or the normalized_value property to deal with a 0…1 float value.