SPI Programmable-Gain Amplifier with Input VOS Trim and Output OPAMP

14 March, 2022

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The project presented here is an SPI programable Gain Amplifier using MAX9939. The MAX9939 is a general-purpose, differential-input programmable-gain amplifier (PGA) that is ideal for conditioning a variety of wide dynamic range signals such as those found in motor current-sense, medical instrumentation, and sonar data acquisition applications. It features SPI-programmable differential gains from 0.2V/V to 157V/V, input offset-voltage compensation, and an output amplifier that can be configured either as a high-order active filter or to provide a differential output.

SPI Programmable-Gain Amplifier with Input VOS Trim and Output OPAMP – [Link]

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