What is an IC?
Analog And Digital Integrated Circuits
Analog integrated circuits work with signals that are constantly changing in time. External components are necessary for analogue integrated circuits. They're used to build electronic circuits like amplifiers and voltage comparators, among other things.
Because they work with binary or discontinuous signals, digital circuits are non-linear. Digital circuits feature only two potential input and output voltages (binary high or low), with no intermediate levels.
Digital integrated circuits are full working blocks that do not require any extra components to function. The output is logic 0 or 1 and can be achieved by applying input.