Analog signal chain calibration

Tuesday, June 7, 2016

Analog signal chains are prone to gain and offset errors that can propagate through the signal chain and reduce accuracy. Even a simple signal chain, such as one consisting of a sensor whose weak analog signal is first amplified and then fed to ADC before being converted to a digital value, can be negatively impacted by these types of errors. This whitepaper will show how to use calibration to eliminate these errors from the entire signal chain using a calibrated delta sigma ADC and an on-chip EEPROM. An implementation using a PSoC® 3/PSoC 5 SoC with programmable gain amplifier will provide a detailed example developers can use as a launching point for use in their own designs.  Read more...