![]() So I did, and I wanted to share my design here. Also I wanted a dedicated, low noise, linear power supply on the peripheral side. There is of course a EVAL board for it for about 50 bucks which is a very good price, but I decided I could even beat that price by designing a 4 layer PCB since PCB's are so cheap these days, and I had all the passives and linear regulators, etc. This hasn't even been released yet as of today and is still in preview, but could be ordered directly from TI. But after a googling this a few months ago, I came across an ASIC from Texas called ISOUSB211. Looking at the market, there aren't many buy options with a reasonable price to get high speed USB isolation. My USB audio interface (MOTU M4) refused to startup if the USB port was not capable of running at 480Mbps. Long story short, after trying different USB isolators on eBay based on ADUM3160, none of them seemed to work. So I decided it's best to isolate the USB interface to the PC. ![]() A transformer in the analog signal path wasn't an option because of increased distortion. It seemed I had to find a way to isolate the analog audio ground from my PC's power supply ground somehow, while maintaining the audio fidelity of my sound card. Tried PCIe interfaces, USB, different outlets for speakers, mains filter, nothing seemed to help. ![]() Whenever I moved a window on the PC for example, I would hear this faint buzzing noise in my studio monitors. Hey guys, I had been suffering with common mode noise and ground loops in my home studio set up for as long as I remember.
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