Isolation

Single-Supply Operation of Isolation Amplifiers

 

For simplicity, many systems are designed to operate from a single external power supply. In battery powered systems such as aircraft and automotive, it's often a requirement. Isolation amplifiers such as the ISO120 and ISO122 can be easily modified for input side single-supply operation with the addition of an INA105 difference amplifier. With ISO amps, it's the isolated input side power supply which most often needs to be single supply. The output side of the ISO amp uses a split ±15V power supply, allowing a full ±10V output swing.