I have 3pcs of AD633 chips, and the accuracy should be ±1% (typical), ±2% (max) according to datasheet.
I wired it like this:
I tried several input voltages, but it seems, that output is still way out of tolerance. For example:
IN1=7.008V IN2=2.003V OUT=1.4537V
Output should be precisely 1.4037V. But it's 3.5% out. All 3 my chips are out of tolerance (up to 5%).
I don't know if there is problem in my circuit? Or problem is that all of those chips are out of tolerance? (bought from China)