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Introduction and basic principle of analog-to-digital converter

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The circuit that converts analog signals into digital signals is called an analog-to-digital converter (abbreviated as A/D converter or ADC, Analog to Digital Converter). The function of A/D conversion is to convert analog signals with continuous-time and continuous amplitude. It is converted into a digital signal with discrete-time and discrete amplitude. Therefore, A/D conversion generally involves four processes of sampling, holding, quantizing, and encoding. In actual circuits, some of these processes are combined. For example, sampling and holding, quantization, and coding are often implemented at the same time during the conversion process.

Basic principle

The basic principle of this kind of converter is to sample the input analog signal at a specified time interval and compare it with a series of standard digital signals. The digital signals converge successively until the two signals are equal. Then the binary number representing this signal is displayed. There are many kinds of analog-to-digital converters, such as direct, indirect, high-speed and high-precision, ultra-high-speed, etc. Each has many forms. The function opposite to the analog-digital converter is called “digital-analog converter”, also known as “decoder”. It is a device that converts digital quantities into continuously changing analog quantities, and there are many kinds and many forms.

More detailed information about the analog-to-digital converter AD7701BNZ.

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