Vibro-meter 200-560-000-016 200-560-101-015 Analog card

The offset errors and gain errors of the entire signal chain can be fine tuned, which leads to an overall improved system accuracy. The offset error can be adjusted by performing offset calibration or zero-scale calibration, whereas the gain error implements a gain calibration or a full-scale calibration.The gain error of an ADC is the maximum voltage error from the ideal; it is the error at the maximum and minimum input voltage, which is shown in Figure 2.

In general, after an analog to digital conversion

the result shows how much error the conversion has. Perform a calibration to ensure that any errors are adjusted. Calibration can be implemented using predefined software on a microcontroller unit (MCU) where the calibration factors are stored in the MCU memory. These calibration factors scale the overall ADC conversion result to remove the gain and offset errors. When this technique is used there is a time penalty, which means that the ADC conversion needs postprocessing on the MCU to ensure the correct value is obtained.

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