AMC1211x-Q1 Isolated Amplifier Texas Instruments AMC1211x-Q1 Isolated Amplifier is a precision, isolated amplifier with an output separated from the input circuitry by an isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide basic galvanic isolation of up to 4.25kVPEAK according to VDE V 0884-11 and UL1577. Used in conjunction with isolated power supplies, this isolated amplifier separates parts of the system that operate on different common-mode voltage levels and protects lower-voltage parts from damage.