9.2 Typical Application

Isolated amplifiers are often used for data acquisition in industrial applications to safely separate the low-voltage portion of the system from the high common-mode voltage input of the system. The input structure of the ISO224 is optimized for isolated voltage sensing in this kind of application.

Figure 47 shows a typical operation of the device for voltage sensing as used in power line monitoring systems. The phase voltage amplitude is reduced with a resistive divider to match the input voltage range of the ISO224. The high input voltage range and the high common-mode transient immunity of the device ensure reliable and accurate operation even in high-noise environments.

Figure 47. Using the ISO224 for AC Voltage Sensing