Hi Keith, I have updated calculation formula and results doesnt look right. I have applied 250mV differential sine wave 250HZ V offset = 2.5V DC to AIN0 channel, I am getting relatively large DC bias from 0, as well amplitude doesnt seem right. Please see bellow schematic of the input stage: Please review and advise if something doesnt look right. Thank you for your support. Regards, Iouri
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