If you can make you own pcb and use an AD1877. (maybe use a DIP to SOIC adaptor)?
https://www.analog.com/media/en/technical-documentation/data-sheets/AD1877.pdf
Where have you said what spec and performance you want?
Channels, sample rate, output format, ADC type etc.
if you need a kit, you must have limited skills otherwise you would be able to design your own.
So I suggest an old chip so you can experiment. The package is large enough for diy soldering. The latest ADCs are almost impossible.
Yeah, that's what it seems.
Anyway, It's somewhat puzzling that there are so little options out there, regarding DIY in that area.
I mean DIY projects that mainly focused in digital audio recordings (not measurements).
From audio sources like vinyl, which has made its comeback for example.
There's plethora of nice DAC projects, like the 'AD1862 almost THT' approach I was reading earlier, lots of brilliant NOS stuff and even extravagant DIY offers the likes of Audio Note (for the few that can afford them unfortunately).
But, none for the opposite route, employing a similar philoshophy for ADCs.
Oh, I see, you did mix up me with somebody else 😉 BTW, I believe that nothing is impossible.
It is a really nice effort and I am sure it is a great product, but as it happens, this is not a DIY-friendly module.
In fact, it can barely be called DIY, since there is not much to solder and boards come prefabricated.
Like I mentioned in a previous post of mine, Uwe Beis went the prefabricated, all-SMD route as well.
So now, how will it be possible for anyone interested to experiment with PIO coupling capacitors, or polysterene caps for decoupling?
Or roll a few DIP8 opamps to find the one that is better suited to his ears?
I know well there are people that ridicule these notions (I was one before I did my own experimenting), but hey, it is a hobby!
What I mean is, that while SMD is fine for anyone looking for that sort of stuff, it is not for the average DIYer that wants to meddle with things.
To learn and experiment with different audio signature of components.
In my opinion, that is one reason (among other things) why projects that use THT parts as much as possible, are still sought after.
yeah, my bad. Cosmos ADC is just an instrument to measure THD+N <-123db i.e. 1.5 times better than AP SYS2722 or to record up to 180kHz and AES17 DR down to 129db(A). Lowest grade-C PCBA(without the housing) $100. For sure, nobody needs such junk )
If you dedicate your project to people doing measurements, so be it!
I'm sure lots of people love to do exactly that.
And I am not sure to what project you are referring to when mentioning the grade-C PCBA.
In any case, there are also people that just want to record music and experiment.
I don't see anything wrong with that.
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I was so bad that also released LNA+Notch unit to record vinyl directly from MM/CM with digital RIAA implemented in the built-in DSP(ES9822Pro has the DSP core).
That is really excellent.
But I think you misunderstood.
In my posts I'm referring to ADC DIY modules with THT components.
The classic, solder-it-yourself kind of stuff.
If anyone is looking for a prefabricated, all-SMD (with the exception of what it seems to be some input electrolytic caps) product, then I am sure yours is a great offer.
But I think you misunderstood.
In my posts I'm referring to ADC DIY modules with THT components.
The classic, solder-it-yourself kind of stuff.
If anyone is looking for a prefabricated, all-SMD (with the exception of what it seems to be some input electrolytic caps) product, then I am sure yours is a great offer.
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unfortunately, even THT parts are critical in such top-performance ADC. You can't replace anything without affecting the distortions or noise.
This topic is very interesting to me. I am looking for a DIY solution for getting single-ended stereo into the Pi's I2S input, and it needs to be just a bare PCB that I can fit into the case of my RPi-based active Xover + amplifier. I found this project which is pretty much exactly what I need, but the chip used (WM8731) doesn't have very good DNR (90dB).
Uwe Beis and Nihtila.com ADCs look good, but part availability is a dealbreaker for both.
If anyone can point me to other options, that would be appreciated.
I am wondering how many people are interested in something similar to the WM8731 RPi hat above, but based around the ES9820 (114dB DNR for only a couple more $ than WM8731)? It would be SMD, but using easy-to-solder parts (0805 and bigger). For op-amps and any critical caps, I would be sure to allow the option of using DIP components. If people really wanted a standalone version, I could make an add-on power-supply board.
The intention here is just to make a pretty good stereo ADC for as cheap as possible.
Is there any reason that this is a terrible idea? (Apart from the fact that it will probably require writing a driver).
Uwe Beis and Nihtila.com ADCs look good, but part availability is a dealbreaker for both.
If anyone can point me to other options, that would be appreciated.
I am wondering how many people are interested in something similar to the WM8731 RPi hat above, but based around the ES9820 (114dB DNR for only a couple more $ than WM8731)? It would be SMD, but using easy-to-solder parts (0805 and bigger). For op-amps and any critical caps, I would be sure to allow the option of using DIP components. If people really wanted a standalone version, I could make an add-on power-supply board.
The intention here is just to make a pretty good stereo ADC for as cheap as possible.
Is there any reason that this is a terrible idea? (Apart from the fact that it will probably require writing a driver).
Why choose ES9820? ES9822PRO brings you 125dB DNR for only 4$ more with same layout. I've built some ADCs using it and it really delivers. But seems a bit fragile.
What do you need that high DNR for?
Audio recordings or measurements?
For audio recording from analog sources, these high figures are pretty much nonsensical.
Good promo material for marketing purposes.
In high precision measurements, that is another story.
Maybe they matter then.
For example, if one is recording an audio signal from vinyl source he's dealing with a media which is inherently noisy (rather high noise floor).
In my experience, even with better vinyl record examples, they'll rarely exhibit a signal to noise ratio of more than ~35dB.
Maybe I'm off in the exact figure, but in any case noise Is part of the parcel and I have no problem with that.
I suppose the rest of the analogue sources should be not far from that.
Maybe tapes fair better?
I am not sure what the case with those.
Anyway, I think you get the point i am trying to convey.
And, then, the traditional fun of solder-it-yourlef DIY doesn't apply.
Plus, you can't tweak the sound signature to taste.
Also, think about an uber-IC from ESS, incorporated to a design that is all SMD and you can't even replace/bypass the electrolytic input capacitors.
It might measure great in the lab, but how will it sound?
Audio recordings or measurements?
For audio recording from analog sources, these high figures are pretty much nonsensical.
Good promo material for marketing purposes.
In high precision measurements, that is another story.
Maybe they matter then.
For example, if one is recording an audio signal from vinyl source he's dealing with a media which is inherently noisy (rather high noise floor).
In my experience, even with better vinyl record examples, they'll rarely exhibit a signal to noise ratio of more than ~35dB.
Maybe I'm off in the exact figure, but in any case noise Is part of the parcel and I have no problem with that.
I suppose the rest of the analogue sources should be not far from that.
Maybe tapes fair better?
I am not sure what the case with those.
Anyway, I think you get the point i am trying to convey.
Problem is, that we are stuck with all-SMD stuff.
And, then, the traditional fun of solder-it-yourlef DIY doesn't apply.
Plus, you can't tweak the sound signature to taste.
Also, think about an uber-IC from ESS, incorporated to a design that is all SMD and you can't even replace/bypass the electrolytic input capacitors.
It might measure great in the lab, but how will it sound?
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