A digital-to-analog converter is a circuit that converts an analog signal into a digital signal, typically used in conjunction with an ADC. In the given product description, the term "Analog-to-Digital Converter" (ADC) refers to a type of electronic device that is used to convert an analog signal into a digital signal. The described 12-bit ADC has one input and utilizes a successive approximation register (SAR) architecture, which is commonly employed in low-power applications due to its efficiency. This particular model features an 8-pin miniature surface mount package (MSOP).