I now have a set of Grzegorz' (aka piglet11) PCBs. Excellent work! Thank you! My buildout plans vary a little, mostly in my choice of supporting parts, so having a ready-made PCB available is going to save me a lot of headaches designing and making my one one-off. The real problem seems to be locating the 4499 chip itself these days. Hopefully that will be resolved sooner than later. I plan to post pics of my progress.
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AK4499EQ | Audio D/A Converters | PRODUCTS | Asahi Kasei Microdevices (AKM) - marked as EOL. Old stock or equipment pull are really your only options and they will get worse over time.
It also says:
NOTICE
AK4498EQ, AK4499EQ: The redevelopment plan of Flagship DAC products will be available soon.
NOTICE
AK4498EQ, AK4499EQ: The redevelopment plan of Flagship DAC products will be available soon.
Does someone will be able to offer me the eagle brd and sch files? So not to start from scratch ����.
Yes the datasheet is available but if anyone have the time and necessary skills is it great for many of us at diyaudio.
Nice! Its too bad the AK4499 chip supply dried up. I am still hoping AKM starts producing this and the 4497 again. I have PCBs and DAC projects that came to a halt and are dead otherwise.
Finally driver for DAC is finished, hardware part 🙂
No I am working on software 🙂
OLED test 1 - YouTube
No I am working on software 🙂
OLED test 1 - YouTube
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My question too, where do you get the AK4499's ?
PS. Tak pozatym to fajne fotki - troche zakuzone
I bought in Digikey in 2019, now the only source is ebay/aliexpress.
Dzięki 🙂, muszę wrzucić do myjki ultradzwiekowej 🙂
Dzięki 🙂, muszę wrzucić do myjki ultradzwiekowej 🙂
I see that some members did some nice dacss with ak4499eq.
They surely know it better than I that I just modify them.
I have dac that is dual mono ak4499.
1.) can be put to voltage moude out, because it plays ok in just followed srpp output stage... you can swap dac board to ak4497 and ak4490 and es9038pro and all are followed with the same output stage with firmware updates of course.
2.) can be all IOUTP and all IOUTN summed prior I/V stage... i read in datasheet that all IOUT pins should not be connected. I have problems with clipping on IOUTP of VOUTP and VOUTN outputs. or in picture below DAC P OUT and DAC N OUT. So on scope upper part of sine wave is cut at 3/4 value.
Cipping is present at 0db out but not visible at -10db.
If this is not ok how will be best connection for dual mono out without I/V opamp stage?
They surely know it better than I that I just modify them.
I have dac that is dual mono ak4499.
1.) can be put to voltage moude out, because it plays ok in just followed srpp output stage... you can swap dac board to ak4497 and ak4490 and es9038pro and all are followed with the same output stage with firmware updates of course.
2.) can be all IOUTP and all IOUTN summed prior I/V stage... i read in datasheet that all IOUT pins should not be connected. I have problems with clipping on IOUTP of VOUTP and VOUTN outputs. or in picture below DAC P OUT and DAC N OUT. So on scope upper part of sine wave is cut at 3/4 value.
Cipping is present at 0db out but not visible at -10db.
If this is not ok how will be best connection for dual mono out without I/V opamp stage?
Attachments
Its not designed to be used in voltage out mode. Its also not designed to parallel outputs before the I/V stages. If you want to use it in a way it wasn't designed for, then you are pretty much on your own. We could talk about ways that would try to use it more like it was designed for. After all, it should sound pretty good used as designed. If it doesn't sound good that way, then you may have some other problem.