1.1 Troubleshooting Tips: Op Amps - Offset Voltage

Understanding how to verify datasheet specifications such as input voltage offset is critical to the application troubleshooting and debugging process. In this training the false summing junction circuit is utilized to demonstrate how to determine the input offset voltage of a linear amplifier. At the system level an offset voltage anomaly may result in the following signatures:

• Increased or decreased output voltage compared to the nominal

• Anomalous reading observed by ADC

• Unexpected sensor reading