Digital-to-analog converters produce voltage from codes.
DACs create analogue voltages from digital words: R-2R ladder, weighted resistor, sigma-delta. Specs: resolution, settling time, monotonicity. A reconstruction filter removes images. Used in audio, waveform generators and control.
An audio codec has a 24-bit DAC.
DACs convert digital codes into voltages or currents, so they drive audio outputs, actuators and set-point signals.
Digital-to-analog converters produce voltage from codes.
DACs convert digital codes into voltages or currents, so they drive audio outputs, actuators and set-point signals.
It converts the digital code into a proportional analogue voltage or current, often through a resistor ladder or a current network.
The stepped output contains high-frequency images of the signal, which are removed with a low-pass filter.
Typical applications include generating an analogue control voltage for a motor driver from firmware, producing an audio tone from a digital waveform and setting the reference voltage of a comparator under software control.
Study "ADC" first (topic 49 of 104 in Electronics & Embedded). It covers the groundwork this topic builds on.
Zero-order hold. Glitch energy. PWM plus filter as cheap DAC.
An audio codec has a 24-bit DAC.
The next topic is "Sampling theorem", which builds directly on this one.
It is classed as Intermediate in Electronics & Embedded (topic 50 of 104). It is an intermediate topic. Work through the beginner topics in Electronics & Embedded first.
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