Digital to Analog Converter (DAC) is a device that transforms digital data into an analog signal. According to the Nyquist-Shannon sampling theorem, any sampled data can be reconstructed perfectly with bandwidth and Nyquist criteria.

A DAC can reconstruct sampled data into an analog signal with precision. The digital data may be produced from a microprocessor, Application Specific Integrated Circuit (ASIC), or Field Programmable Gate Array (FPGA), but ultimately the data requires the conversion to an analog signal in order to interact with the real world.

DACs are used in many digital signal processing applications and many more applications. Some of the important applications are discussed below.

• Audio Amplifier
• Video Encoder
• Display Electronics
• Data Acquisition Systems
• Calibration
• Motor Control
• Data Distribution System
• Software Radio