The last mention of the ES9018 datasheet in this thread indicated that you still had to sign a non-disclosure agreement... good to see this is not needed anymore!
I asked for two weeks ago datasheet directly to ESS - support. No any answer ever...
I just got it today at once that datasheet following Takaji usefully advice/info. Nice!
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Hi Russ
I can see in the old manual of Buffalo this:
"AVCC should be in the range of 3.3V +/- 5%. Voltage outside this range may result in damage the DAC."
I can see in the new manual of Buffalo 3 the follow:
"You might note that we use an AVCC voltage that is slightly
higher than 3.3VDC. This helps us achieve slightly better dynamic range."
In "Technical Details of the Sabre Audio DAC" I can find this:
"The Sabre DAC operates from nominally 3.3v for its analog section and
nominally 1.2v for its digital section. The analog section
power supply is flexible: it will operate from 4.0v down to1.8v
with little performance degradation.
.................................................................................
"This configuration allows >132dB of DNR to be typically
reached. NOTE: With 4.0V power supply greater than 133dB can be achieved."
Is destructive more than 3,3v AVCC or not? The DAC can in fact tolerate up to 4v on AVCC? What could be a safe level in your opinion?
Can you comment a little, and maybe precise exactly what is the AVCC level you have set up in the Buffalo 3?
Thanks.
I can see in the old manual of Buffalo this:
"AVCC should be in the range of 3.3V +/- 5%. Voltage outside this range may result in damage the DAC."
I can see in the new manual of Buffalo 3 the follow:
"You might note that we use an AVCC voltage that is slightly
higher than 3.3VDC. This helps us achieve slightly better dynamic range."
In "Technical Details of the Sabre Audio DAC" I can find this:
"The Sabre DAC operates from nominally 3.3v for its analog section and
nominally 1.2v for its digital section. The analog section
power supply is flexible: it will operate from 4.0v down to1.8v
with little performance degradation.
.................................................................................
"This configuration allows >132dB of DNR to be typically
reached. NOTE: With 4.0V power supply greater than 133dB can be achieved."
Is destructive more than 3,3v AVCC or not? The DAC can in fact tolerate up to 4v on AVCC? What could be a safe level in your opinion?
Can you comment a little, and maybe precise exactly what is the AVCC level you have set up in the Buffalo 3?
Thanks.
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This just reflects a progression of knowledge passed on to me from ESS since that Buffalo manual nothing more. Early data sheets said that AVCC should be 3.3V. What we found with Buffalo II and III was that 3.4 to 3.6V was a sweet spot, lower or higher gave mixed results. Certainly up to 4V is safe , but such voltage will require some tweaking of output stages to compensate. Really if your questions are about the chip itself, they should be directed to ESS.
Really if your questions are about the chip itself, they should be directed to ESS.
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This just reflects a progression of knowledge passed on to me from ESS since that Buffalo manual nothing more. Early data sheets said that AVCC should be 3.3V. What we found with Buffalo II and III was that 3.4 to 3.6V was a sweet spot, lower or higher gave mixed results. Certainly up to 4V is safe , but such voltage will require some tweaking of output stages to compensate.
Thanks again for your comment. In fact, in the meantime waiting my Buffalo coming, I really try to understand better (in details) how the things works... I have no intention to come out on the market with another DAC based on this chip (or another one...).
I was not worried over that, only trying to explain that my knowledge of the chip has its limits as well. I regularly have the ask ESS questions myself.
Stacking two BII or BIII board
I received multiple BIII board kits and looked at bare boards with neither pin headers nor terminal blocks. This looks very flat.
The impression gave me a such idea of "Stacking two BIII boards in a vertical direction and making DAC chip +, - outputs in parallel for a simple stereo configuration with just one I/V module."
This combination would bring 8 DAC output sections for each L/R channel.
Has anyone experimented this configuration and compared with a conventional dual mono?
I received multiple BIII board kits and looked at bare boards with neither pin headers nor terminal blocks. This looks very flat.
The impression gave me a such idea of "Stacking two BIII boards in a vertical direction and making DAC chip +, - outputs in parallel for a simple stereo configuration with just one I/V module."
This combination would bring 8 DAC output sections for each L/R channel.
Has anyone experimented this configuration and compared with a conventional dual mono?
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It should work just fine (though i have not tried it exactly like you say). This would not be dual mono, but would be stereo with 8 DACs in parallel.
I am not sure I would feel compelled to do so.
You will also need to think about DAC addresses etc, you would want special firmware for that.
I would say give it try if you feel like it.
Just keep in mind power requirements and the fact that your I/V stage will have double the output swing unless you adjust it.
I am not sure I would feel compelled to do so.
You will also need to think about DAC addresses etc, you would want special firmware for that.
I would say give it try if you feel like it.
Just keep in mind power requirements and the fact that your I/V stage will have double the output swing unless you adjust it.
Bunpei,
Take a look at this thread about using 2 BII's with a single Legato. This should work the same for 2 BIII's with a single Legato, with the only new issue being the proposed stacking.
http://www.diyaudio.com/forums/twisted-pear/175807-buffallo-dual-mono-1-legato.html
Mark
Take a look at this thread about using 2 BII's with a single Legato. This should work the same for 2 BIII's with a single Legato, with the only new issue being the proposed stacking.
http://www.diyaudio.com/forums/twisted-pear/175807-buffallo-dual-mono-1-legato.html
Mark
It should work just fine (though i have not tried it exactly like you say). This would not be dual mono, but would be stereo with 8 DACs in parallel.
...
Would variations in the AVCC module be an issue?
Hello, Brian. Can you tell me when a single S/PDIF module will be available? Thank you.
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We are still evaluating that clock. Even if we were ready to use them Crystek is not making them in the quantity we need yet. Plus those modules are already built. So the short answer is no.
In the next month or so. I am planning on ordering them soon, then we just need to give them a quick test.
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