The MCP4728 has four 12-bit DACs in a small package to meet any of your voltage setting needs. In addition, it has the ability to store the 's settings into the internal EEPROM. Once saved to the internal non-volatile memory, the settings are loaded by default when the is powered up. All via I2C! Further, the MCP4728 allows you to choose between two reference voltage sources: the input voltage used to power it on the VCC pin, or the internal 2.048V reference voltage. If you use the internal reference voltage (Vref in the ), you can select either 1X or 2X output gain, resulting in a voltage range of 0V to 2.048 or 0V to 4.096V, depending on your application requirements. By default, you use the input voltage as the Vref, allowing you to adjust the voltage over a range of 0V to 3.3V or 5V depending on the input voltage. Alternatively, use 2.048V Vref for approximately 3.3V use and 4.096 Vref for approximately 5V use. Specifications: 12-Bit Voltage Output with Four Buffered Outputs On-board non-volatile memory (EEPROM) for code and I2C address bits Internal or external reference voltage selection Output voltage range: 1. Use internal VREF (2.048V): 0.000V to 2.048V, gain setting = 1 0.000V to 4.096V, gain setting = 2 2. Using external VREF (): 0.000V to 0.2 Least Significant Bit (LSB) Differential Nonlinearity (DNL) (typical) Fast stabilisation time: 6 s (typical) Single supply operation: 2.7V to 5.5V Default I2C address 0x60 Material:PCB Due to different product batches, the appearance , which does not affect the use Package Contents: 1 * MCP4728 Quad Output Module kit