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 DAC's settings into the internal EEPROM. Once saved to the internal non-volatile memory, the settings are loaded by default when the DAC 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 DAC), 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 will 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 DAC with Four Buffered Outputs On-board non-volatile memory (EEPROM) for DAC 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 (VDD): 0.000V to VDD ±0.2 Least Significant Bit (LSB) Differential Nonlinearity (DNL) (typical) Fast stabilisation time: 6 μs (typical) Single supply operation: 2.7V to 5.5V Default I2C address 0x60 Colour:As shown Material:PCB Due to different product batches, the appearance may vary, which does not affect the use Package Contents: 1 * MCP4728 Quad DAC Output Module kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.