An operational amplifier (op-amp) is an electronic component designed for voltage gain amplification. Op-amps most often include a differential input (Vin±), inputs for power supply (Vs±), and a single output (Vout). For an ideal op-amp there are two laws determining its main properties:
Using the two laws, a number of configurations for different purposes can be obtained by creating circuits with op-amps and other components, often resistors. The most common configuations are available as built-in modes on SAM L21 as presented in Built-in Modes.