Dear analog engineers,

I was looking in the datasheet of ADA4897.

There is an example of a low noise gain selectable amplifier with an extra switch in the datasheet.

In this example you placed an balance resistor, to get a more constant offset voltage.

I was looking at the circuit and I was wondering, Is it correct that the balance resistor is on the S2A line?

My feeling says it should be on the S2B line.

Can anyone of you give me a better explanation of how this compensation resistor lowers the offset voltage.

With kind regards,