This MCP4725 I2C DAC breakout module is a compact digital-to-analog conversion solution designed for microcontroller and single-board computer projects that need a controllable analog voltage output without using PWM filtering. Based on the MCP4725, it provides 12-bit resolution output control over a simple two-wire I2C bus, making it a practical choice for Arduino, STM32, and Raspberry Pi systems where GPIO resources are limited and repeatable analog setpoints are required. The board size is specified as 15 x 15 mm, making it easy to mount in space-constrained builds, test jigs, and portable instruments.
This MCP4725 I2C DAC breakout module is a compact digital-to-analog conversion solution designed for microcontroller and single-board computer projects that need a controllable analog voltage output without using PWM filtering. Based on the MCP4725, it provides 12-bit resolution output control over a simple two-wire I2C bus, making it a practical choice for Arduino, STM32, and Raspberry Pi systems where GPIO resources are limited and repeatable analog setpoints are required. The board size is specified as 15 x 15 mm, making it easy to mount in space-constrained builds, test jigs, and portable instruments.
The MCP4725 is a single-channel, voltage-output DAC with an I2C-compatible interface. Your controller writes a digital code (0 to 4095 for 12-bit) and the DAC converts it into an analog voltage proportional to the device reference configuration. In typical use, the output is ratiometric to the supply/reference arrangement described in the MCP4725 datasheet, so the maximum output level and scaling depend on how the module is powered and configured. Because this is an I2C device, the output can be updated via register writes; update rate and settling behavior depend on bus speed, code path, and the specific operating mode used.
A key advantage of the MCP4725 family is onboard non-volatile EEPROM. This allows storing a selected DAC code so the module can recall a defined output after reset or power cycling. This is useful for “power-up default” analog levels such as bias voltages, calibration offsets, or setpoints in control loops. EEPROM write timing, endurance, and exact power-up behavior should be verified against the MCP4725 datasheet and your chosen library implementation.
Use this module anywhere you need a programmable analog voltage:
Connect VCC and GND to your system supply and ground, and connect SDA/SCL to the I2C bus. Ensure pull-up resistors are present on SDA/SCL (often provided on the host board; some module revisions may include onboard pull-ups—verify visually or with a meter). Keep I2C wiring short for reliability, especially at higher bus speeds. For best analog performance, use a clean supply, add local decoupling near the module if needed, and consider output filtering if your application is sensitive to step changes or digital noise. Always confirm logic-level compatibility between the module supply and your controller I2C pins, and consult the MCP4725 datasheet for absolute maximum ratings, recommended operating conditions, and typical application circuits.
MCP4725 I2C DAC breakout module x1
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