The AMC3302 is a fully differential, precision, isolated amplifier with an integrated DC/DC converter that can supply the device from a single 3.3-V or 5-V voltage supply on the low-side. The input stage of the device consists of a fully differential amplifier that drives a second-order, delta-sigma (ΔΣ) modulator. The modulator converts the analog input signal into a digital bitstream that is transferred across the isolation barrier that separates the highside from the low-side. On the low-side, the received bitstream is processed by a fourth-order analog filter that outputs a differential signal at the OUTP and OUTN pins that is proportional to the input signal.

The signal path is isolated by a double capacitive silicon dioxide (SiO₂) insuation barrier, whereas power isolation uses an on-chip transformer separated by a thin-film polymer as the insulating material.