The DFRobot Gravity 12-Bit I2C DAC Module is a compact digital-to-analogue converter based on the MCP4725 chip. It accurately converts digital values to precise analogue voltage signals, providing far cleaner output than PWM-based approaches from microcontrollers.

With on-board EEPROM, the module retains its last DAC setting during power-off and automatically resumes output on power-up. An I2C address selection switch allows two modules to operate on the same bus (0x60 and 0x61). The included library supports generating sine, triangular, and arbitrary waveforms with just a few parameters.

Key Features

• 12-Bit Resolution – Accurate analogue output from 0 V to VCC
• On-Board EEPROM – Retains DAC value during power-off for seamless resume
• Wide Voltage Support – Compatible with both 3.3 V and 5 V controllers
• Gravity I2C Interface – Plug-and-play connector with XH2.54 4-pin header for expansion
• Dual Address Selection – Switch between 0x60 and 0x61 for cascading two modules
• Waveform Generation – Built-in library functions for sine, triangular, and arbitrary waveforms
• Ultra-Low Power – Working current under 0.2 mA

Specifications

• DAC Chip – MCP4725
• Input Voltage (VCC) – 3.3–5.0 V
• Output Voltage – 0 V to VCC
• Resolution – 12-bit
• Working Current – <0.2 mA
• Interface – Gravity I2C (logic level: 0–3.3 V)
• I2C Addresses – 0x60, 0x61 (selectable via switch)
• Dimensions – 27 × 22 mm
• Weight – 13.8 g

Ideal For

• Sensor calibration and testing
• Automatic control systems
• Function and waveform generation
• Precise voltage reference applications
• Arduino and Raspberry Pi projects requiring clean analogue output

Resources

• Product Wiki & Documentation