Digital to analogue converters, or DACs, are signal conversion devices designed to convert digital signals into analogue waveforms ideal for a wide range of audio-video industrial applications. They trigger the digital signal conversion by accepting binary codes or numbers into physical forms like pressure, voltage, or quantity. These physical outputs are then recognised and picked up by devices. Additionally, they work reverse to analogue to digital converters (ADCs).
Where are DACs used, and how do they work?
DACs are primarily found in AV (audio-video) industrial applications and numerous other devices. Audio DACs are responsible for capturing and transforming high-standard digital signals into analogue signal outputs. This could be best explained by taking an MP3 or CD as an example, where digitally stored audio is transformed into an analogue to be heard or played through speakers.
Video DACs operate by converting digital video signals into analogue waveforms with low- to medium-resolution and high-frequency applications. They are also suitable for older TVs and monitor models.
What are the types of digital to analogue converters?
DACs are classified into the following types with given configurations.
- Binary Ladder DACs (R-2R)
These binary converters employ cascade repeating resistor values R and 2R for precise and enhanced accuracy.
These select various current sources depending on digital input signals.
These capacitors are comprised of a capacitor network in parallel configurations.
These resistors are configured in a parallel system where digital signal-dependent resistors are bypassed.
What are the applications of digital to analogue converters?
DACs are the core devices in a wide variety of industrial applications, such as:
- Digital Music Systems
- Mobile Phones
- Music Players
- PC Sound Cards
- Telecommunications
- Telephone Calls
- Televisions.
