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Old 28th June 2005, 04:52 PM   #1
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Default Ultra Analog D20400 datasheet?

I am looking for an Ultra Analog D20400 datasheet.

I am also looking to purchase the parts.
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Old 28th June 2005, 05:52 PM   #2
kevinkr is offline kevinkr  United States
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I am not sure whether or not this part is even available these days, its quite an old design as well. (10+ yrs old) I have an old Ultralink II that uses D20400-A and it does sound very good. I have not been able to get the data sheets. UltraAnalog was acquired a while ago by Wadia, they may or may not be able to help.

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Old 28th June 2005, 08:47 PM   #3
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I cannot remember where I got it from but this could help.

Cheers George
Attached Files
File Type: txt ultra analog chip pin out.txt (620 Bytes, 790 views)
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Old 20th November 2005, 09:27 AM   #4
PeterSt is offline PeterSt  Denmark
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I have unused UltraAnalog devices for sale as well as complete technical descriptions and diagrams.

The stuff for sale is:
1 pcs UltraAnalog AES20 AES/EBU
ultra-low jitter Input Receiver

1 pcs UltraAnalog AES21 AES/EBU
ultra-low jitter Input Receiver (trafo-koblet indgang)

2 pcs UltraAnalog D20400A (Dual channel reference DAC)

Additionally I have digital filters including HDCD decoder
2 pcs Pacific Microsonics PMD100

Please contact me on audiofreak@jubii.dk and let me know which devices you are looking for.

BR Peter
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Old 14th July 2008, 09:20 PM   #5
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I am also looking to purchase UltraAnalog D20400A
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Old 15th July 2008, 12:08 AM   #6
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Ultra Analog D20400 datasheet :
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Old 23rd December 2008, 11:31 AM   #7
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I am also looking to purchase UltraAnalog D20400A
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Old 23rd December 2008, 03:02 PM   #8
JC951t is offline JC951t  Taiwan
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Nice that others are sharing the same santiments as me.
I have a spare SFD2 dac board with a dead input receiver.
Strangely so, I've seen quite a few dead receiver & have been informed that it's not so reliable. My board has a NPC instead
of the PDM100 decoder. Looking at the specs, it seems that
the PDM 100 is pin compatable to the NPC chip.
Can anyone confirm if it is a drop in replacement ?
If it is a drop in replacement, I will try I2S connection to my
CD pro using a Hexinvertor as suggested by Guido Tent.

Thanks in advance
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Old 28th December 2008, 04:00 PM   #9
lowry is offline lowry  Germany
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Default Parasound AES21

Hello !

Last year I bought a used Parasond DAC 2000.
The input receiver AES 21 is defektive and Im trying to repair this receiver. It took me a long time to shorn of its epoxy resin casing.
So far I found a lot of bad solder connections, but this seems not to be the main problem.
Does anyone have a schematic of this device or have anyone repaired this receiver ?

Thanks !

Stefan Winter
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Old 14th January 2009, 12:59 PM   #10
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Hello. Buy a used Sonic Frontiers Jitterbug via ebay. They are cheap and use Input Receiver AES21.De-solder the chip an repair your DAC. Good luck. Wolfgang Graf
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