Hi Vignesh, Looking forward to the testing results from your new PCB! I am not familiar with deriving the respiration rate from the leads. This video at 5:24 gives a brief overview of the respiration feature of the "R" devices: training.ti.com/how-measure-ecg-ads129x-product-family This app note gives a more in depth explanation of how the respiration rate is measured: www.ti.com/.../sbaa181.pdf
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