Explanation: An Analog-to-Digital Converter (ADC) is an integrated circuit specifically designed to convert a continuous analog electrical signal into a discrete digital representation. This process involves sampling the analog signal at regular intervals and then quantizing each sample into a binary value. This conversion is crucial in modern radio systems, allowing analog signals like voice or RF waveforms to be processed, stored, or transmitted using digital techniques (e.g., DSP). A DAC (Digital-to-Analog Converter), conversely, performs the opposite function: converting a digital signal back into an analog waveform. DCC and CDC are not standard acronyms for integrated circuit devices that perform analog-to-digital conversion.