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For simplicity, many systems are designed to operate from asingle external power supply. In battery powered systemssuch as aircraft and automotive, it’s often a requirement.Isolation amplifiers such as the ISO120 and ISO122 can beeasily modified for input side single-supply operation withthe addition of an INA105 difference amplifier. With ISOamps, it’s the isolated input side power supply which mostoften needs to be single supply. The output side of the ISOamp uses a split ±15V power supply, allowing a full ±10Voutput swing.
