#Audio ground loop isolator schematic pro
#Audio ground loop isolator schematic Pc
#Audio ground loop isolator schematic free

4 channels at 24 bits per sample at 48 kHz sampling rate. I do believe four channels is the maximum that existing S/PDIF optical audio stuff supports, i.e. Comments, suggestions, welcome.īut not sufficient bandwidth for multichannel audio. You can drag these to any EasyEDA projects.

The design json files are attached at the end of this post.

#Audio ground loop isolator schematic pro

Since I'm by no means a pro hardware designer, I have shared this here for the community to perhaps improve it or use it in other ways as you see fit. So if you want to order this PCB, make sure to use this exact stackup, called JLC7628. These were calculated to be 90 Ohm differential impedance using JLCPCB's calculator ( ). The PCB was manufactured with JLCPCB's 7628 stackup to get controlled impedance on the high speed traces. It cuts off power in case of over-voltage, under-voltage, and over-current in the matter of nanoseconds. Here are my design files so far: What it looks like after building it: To protect my audio interface from the power supply misbehaving, I added a voltage supervisor and protection IC (LTC4361).

#Audio ground loop isolator schematic free

So if you find things that are odd or can be improved, please feel free to let me know. Please note that I'm not an EE by trade, I only do this as more or less a hobby. All ground noise has been totally removed from my set up. After assembling it, I've run it for about two months now, and it really works amazingly. I designed the circuit in EasyEDA and manufactured it with JLCPCB. 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.

#Audio ground loop isolator schematic Pc

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.