Design Support

ADC Offset in MSC12xx Devices (Rev. B)

The offset parameter plays a significant role in analog-to-digital (A/D) conversion, especially in the high-resolution delta-sigma A/D converter (ADC) implemented in the MSC1210, MSC1211 and MSC1212 devices. This application report discusses the following points: a) The main sources of ADC offset in these devices; b) Compensating the offset by using either hardware or software; c) The Null_Offset program, which gives the user an opportunity to try different kinds of offset compensation. The information contained in this bulletin also applies to the ADS1216, ADS1217 and ADS1218 devices.



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