PGA (Programmable Gain Amplifier)
PGA (Programmable Gain Amplifier) is an electronic amplifier (often an op amp), of which the gain can be controlled by external analog or digital signals. These gains can be set from under 1V/V to over 100V/V. Examples for external digital signals can be SPI and I²C. The latest programmable gain amplifiers can also be programmed for offset voltage trimming and for use as active output filters.