Hi Brijesh Yadav, [quote userid="569738" url="~/support/data-converters-group/data-converters/f/data-converters-forum/1356613/ads1263-to-measure-1ua-to-15a-dc-current-using-ads1263/5176991#5176991"]1. -Vref for full-scale differential input voltage is managed by ADS1263, i.e. we don't need to provide it externally.[/quote] Did you mean to add the "-" sign in front of "Vref"? If so, do you think you need a negative reference for this board? If not, the ADS1263 has an internal 2.5V reference. The ADS1263 also has external reference inputs if the performance of the integrated VREF is insufficient for your application [quote userid="569738" url="~/support/data-converters-group/data-converters/f/data-converters-forum/1356613/ads1263-to-measure-1ua-to-15a-dc-current-using-ads1263/5176991#5176991"]2. As our application is battery profiling, and ADS1263 has a Full-scale differential input voltage range of –VREF / Gain to VREF / Gain , ADS1263 will be suitable for measuring bidirectional current.[/quote] This depends on the absolute voltage of your input signals. If VREF = 2.5V and G = 1, then you can measure from -2.5V to +2.5V differentially . That means the differential voltage between the AINP and AINN pins (VIN = AINP - AINN) is between those two voltages But the absolute voltage on any pin must be within the range provided in the Recommended Operating Conditions. So if your absolute voltages are AINP = 20V and AINN = 17.5 V, then that is way outside the range of the ADC. But the differential voltage is 20-17.5V = 2.5V. So you need to be careful about the absolute voltages as well as the differential voltages. You will need to read the entire datasheet to really understand how this ADC behaves. -Bryan
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