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One of the reasons to follow the advice of your instructor is that page 17 of the datasheet identifies the need for ground return paths for input bias currents. Your initial setup may or may not wo...
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#1: Initial revision
by
DSI
·
2023-03-11T07:28:22Z (over 1 year ago)
One of the reasons to follow the advice of your instructor is that page 17 of the datasheet identifies the need for ground return paths for input bias currents. Your initial setup may or may not work depending on the specific function generator and its output settings, because there is no current flow into the AD620 In+ pin. The setup proposed by your instructor allows the current to flow from the function generator through R1>R2>R3>ground.