The A\/D converter in a multimeter is an electronic component used to convert an analog signal to a digital signal. It usually consists of an analog input and a digital output. A\/D converters may vary in appearance from model to model, but usually have a display and some control buttons or knobs for selecting measurement ranges, units, and other parameters.
Inside, the A\/D converter contains an analog circuit that converts the input signal into digital form and displays the result on the screen via a digital processor. This converter plays a key role in multimeters, enabling users to accurately measure and read various electrical parameters.
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The A-D converter in the multimeter is a piece of analog-to-digital conversion Ic chip. Nothing special.