To calculate TL103WA current sense application accuracy/tolerance, is there any excel calculation tool could share with?
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Thanks for your question. Unfortunately, I am not aware of any such tool that we may have for this part. Have you seen one before?
The application error or accuracy is going to depend on the current-sense topology in place. Several of these are covered in the TI Amplifier Circuit Cookbook, although only the Single-Supply, Low-Side, Unidirectional Current-Sensing circuit (page 53 of current version) seems to calculate the full-scale range error.
Please let me know if you have any follow up questions.