Many applications have multiple paths to ground across the system. However, these ground paths can be the source of interference. The interference (called ground loop interference or a ground loop) is created when two or more devices in the same circuit have different ground potentials with respect to one another. Ground loop interference and shifting grounds can cause a variety of issues such as errors in data transmission or signal loss. The interference can even create a risk of electrical shock that can be hazardous to people or damage equipment in high-voltage applications.
Audio applications are particularly susceptible to small interferences in the audible range that can be caused by low-cost and unbalanced power solutions in computers and interfaces. TI's Isolation solutions feature best in class-isolation that can be used to remove these ground loops. For more information, please see USB Audio Isolation with Isolated USB 2.0 Redriver.
