Hi, 1) Do you have anymore information of the ADS1278-HT errors over the entire temperature range [CY] The datasheet's Electrical Characteristics Table has two groups of specs, the right most of which show values expected at 210C. So the typical degradation expected from 25C to 210C can be inferred by comparing values in the typical columns of each group of specs. Also, the typical characteristic plots show several parameters measured over the full temperature range from -55C to 210C. No additional information is available. 2) Do you have any calibration suggestions to mitigate these errors [CY]Footnote (1) in the Elecrical Characteristics Table states that the values shown in the table can be reduced by using the calibration functions of the device. Page 18 of the datasheet describes the different calibration functions available. 3)I've seen in other TI app notes for uP ADCs that the channel to channel differences is very low. for the ADS1278-HT could i use 2 x unused channels tied to a reference and ground to create gain an offset values for the other channels connected to my sensors? [CY]Yes, if I understand you correctly, this is analogous to cold junction temp compensation where an identical parallel ADC path is used to sense ADC temperature and offset remote temperature sensing. Thanks Christian
↧