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ADuC845 Calibration Logic

From the ADuC845 datasheet,

                      The result of the zero-scale calibration conversion is stored in the offset calibration registers for the appropriate ADC. The result of the full-scale calibration conversion is stored in the gain calibration registers for the appropriate ADC. With these readings, the calibration logic can calculate the offset and the gain slope for the input-to-output transfer function of the converter.

What is the Calibration logic used here?

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  • Hi,

    The typical procedure to perform system calibration is first to apply a differential voltage of 0V to the analog input, then a full-scale differential voltage. There is an example of the system calibration in the datasheet (Rev.D Page 35 of 110).

    The input voltage range for the AIN+ and AIN- pins are -0.3V to AVdd+0.3V.

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