The MCP4922 is a 12-bit, high accuracy, low noise performance, buffered voltage output Digital-to-Analog Converter (DAC). This is an SPI-compatible Serial Peripheral Interface device with a 2.7V to 5.5V supply.
MCP4725 IC from Microchip Technology, is a Single Channel, 12-Bit Digital-to-Analog Converter with integrated EEPROM and an I2C Compatible Serial Interface which is compact in size and has a small footprint. MCP4725 basically converts digital value into analog output voltage.