AutoQuiz: What Device Is Used to Change an Analog Signal to a Digital Signal?

AutoQuiz is edited by Joel Don, ISA's community manager.

This automation industry quiz question comes from the ISA Certified Control Systems Technician (CCST) program. Certified Control System Technicians calibrate, document, troubleshoot, and repair/replace instrumentation for systems that measure and control level, temperature, pressure, flow, and other process variables. Click this link for information about the CCST program. This question comes from the Level I study guide, Domain 3, Troubleshooting. Level I represents a professional who has a five-year total of education, training, and/or experience.

A device used to change an analog signal to a digital signal is most often called a:  

a) transducer
b) signal conditioner
c) transmitter
d) converter
e) none of the above

In electronics, a digital-to-analog converter (DAC, D/A, D–A, D2A, or D-to-A) is a function that converts digital data (usually binary) into an analog signal (current, voltage, or electric charge). An analog-to-digital converter (ADC) performs the reverse function.

The correct answer is D.