What is analog to digital converter ADC using LM324 IC

The process of converting an analog voltage into an equivalent digital signal is known as Analog to Digital Conversion, abbreviated as ADC. An ADC is an electronic circuit which converts its analog input to corresponding binary value. The output depends up on the coding scheme followed in the ADC circuit. For example Analog value may convert to Gra

y code, excess 3 code and so on. Analog to Digital converter ICs are also available to do this operation. Which reduce the circuit complexity such that a single IC capable of doing Analog to Digital Conversion. The circuit below shows a 2 bit ADC circuit using LM324 comparator IC. A potential divider network and some combinational circuits are used for making this simple ADC. LM324 best suited for Analog to Digital Converters because it has four embedded op amps, it require Vcc (5V) and ground only. No need of -Vcc like 741 op amp. To represent 4 states in binary, only 2 bits are needed, so we are using a digital combinational code converter circuit with 3 logic gates. Thus it is possible to get binary outputs like 00, 01, 10, and 11. The term Resolution is used to describe the accuracy of ADC, resolution means the number of distinct values that ADC can generate over the range of analog values.

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