USB ISOLATOR USING LTM2884

[Music] hello my name is Jeff Marvin I'm the design center manager at linear technologies Burlington Design Center today we're headed into the lab where I'll demonstrate rugged USB isolation using the LTM to edit for isolated USB transceiver with isolated power USB or universal serial bus is a four wire interface to four differential signaling D plus and D - and - for power V bus which is 5 volts and ground this figure illustrates the simplicity of isolating the USB port now before we exercise this device let's take a brief look at what's inside the LTM - 8 8 4 micro module includes two USB transceivers each facing the outside pins D plus and D - while internally communicating across a pair of galvanic Lea isolated signal inductors the top section of the diagram shows an integrated regulated 2.5 watt flyback DC to DC converter complete with an isolation transformer output diodes and cap