# A look at digital to analog conversions

If I wanted to create an analog output wave with frequency components from 0 to 11 kHz, what is the slowest rate at which I could output to the DAC? Proving the Nyquist Theorem mathematically is beyond the scope of this course, but we can present a couple examples to support the basic idea of the Nyquist Theorem: Introduction to Digital-Analog Conversion Chapter 13 - Digital-Analog Conversion Connecting digital circuitry to sensor devices is simple if the sensor devices are inherently digital themselves. However, when analog devices are involved, interfacing becomes much more complex.

What is needed is a way to electronically translate analog signals into digital binary quantities, and vice versa. An analog-to-digital converteror ADC, performs the former task while a digital-to-analog converter, or DAC, performs the latter.

An ADC inputs an analog electrical signal such as voltage or current and outputs a binary number. In block diagram form, it can be represented as such: A DAC, on the other hand, inputs a binary number and outputs an analog voltage or current signal. In block diagram form, it looks like this: Together, they are often used in digital systems to provide complete interface with analog sensors and output devices for control systems such as those used in automotive engine controls: It is much easier to convert a digital signal into an analog signal than it is to do the reverse.Using an analog oscilloscope, Matt Mayfield proves that digital audio is an accurate, smooth representation of the analog waveform.

The anti-aliasing filter in the analog-to-digital converter and. In electronics, a digital-to-analog converter (DAC, D/A, D2A, or D-to-A) is a system that converts a digital signal into an analog signal.

An analog-to-digital converter (ADC) performs the reverse function. Because analog video is displayed via a series of scans and digital video is displayed via light and color intensity on fixed dots (pixels), conversions produce signal loss and errors. Ideally a video signal would be analog or digital from one end to the other. Analog to digital conversions are dependant on the system voltage. Because we predominantly use the bit ADC of the Arduino on a 5V system, we can simplify this equation slightly: If your system is V, you simply change 5V out with V in .

Analog to Digital Converters (ADC) translate analog electrical signals for data processing purposes. With products matching performance, power, cost, and size needs, Analog Devices offers the industry’s largest A/D converter portfolio. In electronics, a digital-to-analog converter (DAC, D/A, D2A, or D-to-A) is a system that converts a digital signal into an analog signal.

An analog-to-digital converter (ADC) performs the reverse function.

Introduction to Digital-Analog Conversion | Digital-Analog Conversion | Electronics Textbook