Build thread for Diyinhk ES9018 DAC on Ebay - Page 22 - diyAudio
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Old 26th January 2013, 12:27 PM   #211
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I forgot to mention the PCM1795, easier to implement DSD as it shares pins with PCM and supports 32bits, probably up to 384KHz even if not mentioned in the data sheet.
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Old 26th January 2013, 02:42 PM   #212
glt is offline glt  United States
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Quote:
Originally Posted by KlipschKid View Post
Great job, as always GLT !

What do you guys think of the ADP7104 ?

BTW, diyinhk is selling two more DIY DAC boards, and I've always wanted to try the AKM AK4399.
Thanks...

The ADP1704 looks very good too, especially in the noise department for higher voltages. The pin arrangement is also the same as the LT1963, so you could do the flipping trick.

Perhaps diyinhk can figure out a way to support several footprints for different regulators...
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Old 26th January 2013, 02:49 PM   #213
glt is offline glt  United States
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Originally Posted by Jackal29a View Post
I forgot to mention the PCM1795, easier to implement DSD as it shares pins with PCM and supports 32bits, probably up to 384KHz even if not mentioned in the data sheet.
Yeah, it is possible it can support the higher sample rates. I've tested the PCM1798 in the Musiland to 352K and it is not specified to support those frequencies...
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Old 26th January 2013, 06:53 PM   #214
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I found the same with my ES9023 based DAC, it plays both 352K.8 and 384K though its data sheet says 192K max.


PS. Did you test Direct/Native DSD?
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Old 27th January 2013, 05:41 AM   #215
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Hi,

Is there a pin-for-pin upgrade for the pcm1794a ? It seems it's as good as it gets for Ti ?

Here's a photo of the start of casing my ES9018. The large case for the DAC is 150mm x 146mm x 70mm, and the small case for the transformer is 115mm x 77mm x 48mm. I got them from my local shop - WECL. I plan to make a 5-core shielded cable to connect them.

L150*Aluminium Casing (146x150x70mm) - WECL Online

Click the image to open in full size.

Last edited by KlipschKid; 27th January 2013 at 06:02 AM.
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Old 27th January 2013, 08:29 AM   #216
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Quote:
Originally Posted by KlipschKid View Post
Hi,

Is there a pin-for-pin upgrade for the pcm1794a ? It seems it's as good as it gets for Ti ?
Nope, the 1794 is TI's top of the range performance wise. It can be set up for mono opreration using 2 chips though. DSD1794 has same specs but adds DSD but using different input pins than PCM so implementation requires extra circuitry.
Over the above the PCM1795 adds DSD on same pins as PCM plus 32bit (Vs 24) but it is less performing:

PCM1794 ($13) / PCM1795 ($8):

Dynamic Range: in stereo mode up to 129 / 123 dB or in mono mode 132 / 126 dB
THD+N: 0.0004 / 0.0005%
Stop Band Attenuation: -130dB / -98 dB
Passband Ripple: 0.00001 / 0.0002 dB
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Old 27th January 2013, 10:59 AM   #217
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Thanks. I think the AK4399 is the better choice of these two, and not so expensive I could get one just to try out... too many DACs, not enough time :-(
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Old 27th January 2013, 11:19 AM   #218
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The only thing I don't like about the AK4399 is the max clock speeds specified in its data sheet (33.8688/36.8640 ->192fs). Maybe it can also work reliably with 45.xxx/49.xxx just like the ES9023 or the PCM1795/6 do 352.8/384K and neither is spec'ed for it. It'll be very interesting if Diyinhk could confirm this.
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Old 29th January 2013, 05:22 AM   #219
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Progress has slowed... this is all I have for an update. The transformer box / cable is done.

Click the image to open in full size.
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Old 29th January 2013, 06:24 AM   #220
qusp is offline qusp  Australia
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Quote:
Originally Posted by Jackal29a View Post
The only thing I don't like about the AK4399 is the max clock speeds specified in its data sheet (33.8688/36.8640 ->192fs). Maybe it can also work reliably with 45.xxx/49.xxx just like the ES9023 or the PCM1795/6 do 352.8/384K and neither is spec'ed for it. It'll be very interesting if Diyinhk could confirm this.
its already confirmed to work at 384khz

the AKM
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