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How Does an Algorithmic ADC Work?

April 26, 2017ADC algorithmic

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How Does an Algorithmic ADC Work?

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An algorithmic ADC is used in high-resolution and low-power applications. It operates based on comparisons between the ADC’s reference voltage and the input signal. In this architecture, the reference is constant. The input signal changes in the range of zero to the reference voltage. In this method, the input signal is doubled and compared to the reference. As long as the input signal is less than the reference, the output is set to zero. The input signal is multiplied by 2 and is compared to the reference until it exceeds the reference. Then the output is set to 1 and the reference is subtracted from the input signal. The process can be repeated to achieve higher resolution.