What device is responsible for converting analogue data into digital form?

An analogue to digital converter (ADC) is the device that transforms analogue data—which is continuous and can take on any value—into a digital format, which is discrete and consists of binary numbers (0s and 1s). This conversion process is essential in digital electronics and computing, where information must be processed in a digital form for further manipulation, storage, or transmission. The ADC samples the analogue signal at defined intervals and quantizes it, providing a digital representation that can be used by computers and digital systems.

Other types of devices mentioned serve different functions. For instance, a digital to analogue converter (DAC) performs the opposite function, converting digital data back into analogue signals. Input devices are used to collect data or commands from the user, while output devices are responsible for presenting the processed data to the user in a human-readable format. Thus, the analogue to digital converter specifically fulfills the role of transforming analogue signals into digital, making it the correct choice in this context.