Which device converts an analog signal into binary data?

• A. DAC
• B. Transducer
• C. ADC
• D. Plant

Answer: (C)

The device that converts an analog signal into binary data is an Analog-to-Digital Converter (ADC). This process enables the translation of continuous signals, which can represent real-world phenomena like temperature, sound, or light, into a digital format that computers and other digital systems can process and understand.

ADCs function by sampling the analog signal at regular intervals and then quantizing the sampled values into discrete levels. Each of these levels corresponds to a binary number, allowing the continuous analog signal to be represented as a series of binary digits (bits). This conversion is fundamental in modern electronics, as it allows for the integration of analog inputs into digital systems, enabling everything from audio processing to sensor data interpretation in computer systems.

In contrast, a Digital-to-Analog Converter (DAC) performs the opposite function by converting binary data back into an analog signal. A transducer generally refers to a device that converts one form of energy to another, such as mechanical to electrical energy, but it does not inherently convert signals into binary data. The term "plant" typically relates to industrial processes or operations involving systems, and it does not pertain to signal conversion. Thus, the ADC is specifically designed for the purpose of converting analog signals to binary, making it the correct answer.