MCP4725 Breakout Board - 12-Bit DAC w/I2C Interface

This breakout board adds a DAC (Digital-to-Analog Converter) to your microcontroller setup, offering the MCP4725 12-bit DAC for precise and easy analog output. Control it via I2C, sending it a value, and the VOUT pin will output the corresponding voltage. This is perfect for audio and analog projects where you need a clean sine wave or adjustable bias point but can't use PWM.

You can connect two MCP4725 DACs to a single I2C bus by controlling the ADDR/A0 pin—just tie one high (or close the jumper on the back) to avoid conflicts. The board comes with a 6-pin header, ideal for breadboard use, and supports both 3.3V and 5V logic.

Notable features:

• The chip supports up to 200kHz output updates, even though Arduino boards typically don't support the 3.4Mbps Fast Mode I2C.
• It includes an EEPROM, allowing you to store the output voltage so that it persists across power cycles.
• The output is rail-to-rail, meaning it matches the power supply range—0-3.3V if powered at 3.3V, or 0-5V if powered at 5V.
• The board also features four mounting holes for easy attachment, and an optional 3.5mm terminal block spot (not included) for soldering if desired.

For quick integration, the board is built in the STEMMA QT form factor, making it easy to interface with. It has STEMMA QT connectors on both sides, which are compatible with SparkFun Qwiic I2C connectors. This allows you to connect the MCP4725 to your development board without soldering, and you can even chain it with other compatible sensors and accessories using a suitable cable (sold separately).

Technical details:

• I2C address options: 0x62 or 0x63.
• A custom-made PCB with updated silkscreen for clarity.
• STEMMA QT compatibility for plug-and-play use with I2C-compatible devices.
• The board includes Fritzing and EagleCAD files, as well as a datasheet in the product tutorial.

With this board, you'll have easy-to-use functionality for generating analog signals with any microcontroller that supports I2C.