Hello,
Seems to be a commercial product.
https://www.aliexpress.com/item/3256805577652364.html
Stef.
Seems to be a commercial product.
https://www.aliexpress.com/item/3256805577652364.html
Stef.
My product is also commercial, but I can share schematic 🙂
It is with 3165/66, but for 4165/66 it will be the same (just the crystal position).
Attachments
It's interesting and the price is small considering also the metal case.
However it seems that not all implementations sound the same and furthermore I don’t understand the 2 clocks in this one.
I've (a commercial) one that is on a PCB that is as small as a third of this and that I modified to attach it directly into the USB socket without using any cable.
I find that eliminating the cable (as short as it is) and 1 connector is just as an effective thing to (try to) improve the sound, at least here.
In my system 4166 sounds great, far better than 3160 and 4160 to my ears.
3160/4160 - are not High Speed, just Full Speed. (Difference between 3xxx and 4xxx - isolation voltage only).
For listening 44/16 is doesn't matter, however, HS interfaces inside the DACs are usually better then FS (UAC2 mode, async. transfer, etc.).
There are not many cheap ADUM4166 on the market yet.
Cheaper with ADUM4166 (or supposedly using the ADUM4166), I found:
https://hifimediy.com/product/hifime-high-speed-usb-isolator-v2/
https://www.aliexpress.com/item/1005001933476089.html
https://www.aliexpress.com/item/1005001379930133.html
Afterwards we jump to more than 100€ (Topping, Intona, etc.).
Stef.
Cheaper with ADUM4166 (or supposedly using the ADUM4166), I found:
https://hifimediy.com/product/hifime-high-speed-usb-isolator-v2/
https://www.aliexpress.com/item/1005001933476089.html
https://www.aliexpress.com/item/1005001379930133.html
Afterwards we jump to more than 100€ (Topping, Intona, etc.).
Stef.
Just forgot to add that I also modified it to power it separately with a linear power supply and that I don’t use the PC, but a Digital Transport as source.
By the way, I think that (only my opinion) eliminating the PC from listening to your favorite music is itself a good step forward in the search for your own "better" sound.
Just sayin'...
Hello!
The two last are made on discretes components.
Schematics are pretty the same. FPGA - transformer - FPGA - USB hub. Hub always run at hi speed (480 mbps) so this is simple to communicate with it via isolator.
With best regards.
Attachments
Hellо!
I have a problem with this USB isolator. I found it necessary to install the copper radiator plates on the FPGA-driver, but due to the mechanical removal of the marking, the surface of the chips was very uneven. I tried to sand the surface and broke one chip.
Maybe you know where I can buy such an FPGA chip, even with erased markings, so that I can replace it?
Attachments
Hello OP111op,
The isolator you showed us is no longer available at the address you gave us.
Do you know of another place I could find it?
Whether it's fully wired or just the PCB.
I should point out that I'm only looking for an isolator with version 4166 of the ADuM.
Thank you in advance.
Alain
Why exactly 4166 and not 4165?
Or 3165/3166?
Alex.
P.S. It was discussion about x165 or x166, but as I remember - w/o conclusion
I understood, but it is interesting 2 things:
1) why 41 and not 31? 3750 Vt isolation is not enough, you need 5700 V? Chips are the same.
2) why 66 and not 65?
Both have 24MHz clock.
Alex.
You're right Altor
I hadn't read the datasheets properly.
65 vs. 66, 24MHz clock is either upstream or downstream.
It seemed to me that a downstream clock was ultimately more favorable, but I didn't have a scientific reason to give.
31 vs. 41, indeed, 3,7kV of insulation is quite sufficient, I don't need 5.7kV.
I hadn't read the datasheets properly.
65 vs. 66, 24MHz clock is either upstream or downstream.
It seemed to me that a downstream clock was ultimately more favorable, but I didn't have a scientific reason to give.
31 vs. 41, indeed, 3,7kV of insulation is quite sufficient, I don't need 5.7kV.
I'm interested with this isolator. It turns out that the 66 differs from 65 in that peripheral side with clock can be powered from clean supply. In 65 chip we can also do it, but then we need additional isolated 5V source for PC side to cut VBUS from PC. But it mentioned in DS that "When isolating a downstream facing USB port for a USB host, choose the ADuM3165 rather than ADuM3166 to have the clock source on the controller side". Why ?
As I said, it was a discussion of this, w/o conclusion.
I made a universal PCB that can accept either 65 or 66, and used both. I didn't notice much of a difference.
P.S. But to be honest, I only used the AD3165/66 for a short time when the Texas 211 chip was temporarily unavailable.
Alex,