The AD532 should be connected as the following figure for operation as a multiplier. We can fed the input differentially to the X and Y inputs, or single ended by simply grounding the unused input. Connect the inputs according to the desired polarity in the output. To close the feedback loop around the op amp, the Z terminal is tied to the output. The offset adjust Vos is optional and is adjusted when both inputs are zero volts to obtain zero out, or to buck out other system offsets.
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