Digital to analog conversion (D/A) is often performed by the microcontroller in practice. This chips accepts digital value by SPI and output analog voltage. It can also generate analog voltage in 12-bit resolution on its output pin.
For Datasheet and other details visit Microchip part# MCP4921-E/P
Device provides very high accuracy and low noise performance, and is suitable for consumer and industrial applications, such as set point control, offset adjustment and sensor calibration applications.