Hey, I am currently using DC427B evaluation board which uses LTC1968. I have a differential opamp that outputs sine wave signal with a DC Offset. I plan on using a 1uF capacitor for AC coupling.
I have read the document guideline of DC427B, and I am sort of confused if I need to put 10kohm between the AC coupling capacitor and the input. Per the paragraph below, it say to put 10kohm between the input and the signal when AC coupling but at the end of the paragraph, it says that R6/R8 can be replaced with a capacitor to provide AC Coupling.
Please tell me if I need to put 10Kohm or not between the AC coupling capacitor and the input IN1; it sort of make sense to put 10kohm infront of the caps to reduce power consumption and noise but I am not entirely sure.
Corrected few mistakes
[edited by: shurp at 5:50 AM (GMT -4) on 26 Aug 2021]