A digital-to-analog converter is an electronic device that converts a discrete-time signal into a continuous-time analog signal, allowing for the conversion of digital data into a format that can be easily read by analog devices. This process typically involves taking a series of digital values and mapping them to corresponding analog voltages or currents, which are then transmitted as a continuous waveform. Digital-to-analog converters are commonly used in applications such as audio equipment, medical devices, and telecommunications systems, where the need to interface between digital and analog signals is crucial.