Part Number: ADS1246EVM-PDK
Hi,
Our customer is curious about the input common-mode range of ADS1246 and ADS124S08. Since for ADS1246, AVSS + 0.1V + [|VINMAX| • (Gain) / 2] < VAIN1, while for ADS124S08, AVSS + 0.15V + [|VINMAX| • (Gain − 1) / 2] < VAIN1. Why for ADS124S08, it should be gain-1, while for ADS1246, it's just gain?
ADS124S08:
Besides, is it calculated by the equation shown as the picture below? Does it mean that the output of the first-stage amplifier of the INA should be within the input common-mode voltage range of the INA? I'm quite confused.
Thank you so much for your help.
Best regards,
Dustin