This device takes a discrete sequence of digital codes and outputs a proportional analog signal. The conversion process relies on networks of switched resistors or current sources driven by a reference voltage. Performance is defined by resolution in bits, sampling rate, and dynamic range, making them essential for audio playback, video generation, and motor control.
We need a 16-bit digital-to-analog converter to get the noise floor low enough for this audio output.
A common beginner mistake is forgetting to add an analog low-pass reconstruction filter to the output, which leaves high-frequency switching noise in the signal.
Also heard as
- DAC
- D-to-A
Do not mix it up with
- Analog-to-digital converter: A DAC turns data into physical signals, while an ADC turns physical signals into data.
Related terms
Analog-to-digital converter
A mixed-signal circuit component that translates continuous physical voltages into discrete digital numbers.
Quantize
The process of mapping a continuous range of analog signal values to a finite set of discrete digital levels.
Signal processing
The mathematical manipulation of physical data streams to filter, compress, or extract information.