CMOS-Based Galvanic Digital Isolator

Galvanic isolation is a principle of isolating electrical systems wherein it blocks the DC current flow (i.e. there is no direct conduction path). Isolation is the ability to couple one circuit to another without the use of direct wire connections. This technique is commonly used in two or more electric circuits that must communicate, but their grounds are at different potentials. It is an effective method to prevent unwanted current from flowing two units sharing a conductor. Its purpose is for safety by preventing accidental currents from reaching ground through a person’s body. This design features Silicon Labs' SI8642 CMOS digital isolator, which is a low cost, high performance, low power, and reliable isolated circuit. Read more