MCP2221A - USB to GPIO ADC I2C - Stemma QT / Qwiic - Adafruit 4471

The module is based on the MCP2221A system, equipped with GPIO ports, ADC analog inputs and I2C interface, to which access is possible via the USB type C connector. On the converter board you can also find one Qwiic / Stemma QT connector, which allows for quick and easy connection of I2C modules with the same connector. The built-in regulator allows you to operate modules operating with 3 V logic. Logic voltage can be changed to 5 V by cutting the 3 V jumper and soldering with 5 V on the bottom of the board.

* 3.3 V or 5 V selectable with a jumper.

** same DAC output on both pins.

The board with the MCP2221 chip can be connected to the computer via the USB type C connector and operate the LEDs , motor drivers and other modules and sensors via GPIO, 10-bit analog input (ADC), 5-bit DAC output and I2C and UART interface. The pins of the board work with a voltage of 3 V or 5 V, selected with a jumper on the bottom of the board. The module can be programmed in Python.

• Chip: MCP221
• Communication with the computer: USB type C connector
• Supported interfaces:
  • GPIO
  • I2C
  • UART
  • 10-bit analog input (ADC)
  • 5-bit output (DAC)
• Logic: 3 V / 5 V - selected with a jumper on the bottom of the board
• Conclusions:
  • 2.54 mm goldpin connectors - the goldpin strip is included in the kit for self-soldering
  • Stemma QT / Qwiic connector
• Dimensions: 27 x 17.7 x 5 mm
• Weight: 2.2 g

• 1x MCP2221A - USB to GPIO, ADC, I2C converter - Stemma QT / Qwiic - Adafruit 4471
• 1x goldpin strip, 1x 12-pin, 2.54 mm pitch

• The website of the manufacturer: Adafruit 4471
• User Guide
• Documentation of the MCP2221 system
• EagleCAD files on GitHub
• The Fritzing facility in the Adafruit Fritzing library
• The scheme of the board
• Dimensions and Fab Print
• Description of the pins of the board