SBAS925A August 2018 – November 2018 ADS1119
Figure 46 shows the measurement results for the voltage measurement on AIN3. The measurements are taken at TA = 25°C. The black curve shows the measurement error in mV without any offset and gain calibration. The red curve shows the measurement error after offset and gain calibration. The gain calibration removes both the gain error and the error introduced by the initial inaccuracy of the internal voltage reference.