Information wanted about Accuphase DP-70 DAC: 4 pices Intersil's 4-bit ICL 8019ACPD

tiefbassuebertr · 19th March 2010, 04:43 PM

4 pices Intersil's 4-bit ICL 8019 forms a 16-bit discrete and very fine sounded digital to analog converter by Accuphase's DP70.
For this integrated circuit I need datasheets and replacement parts. Only suppliers I find some on the web, but no data sheets or other helpful informations.
Here URLs from Italian forums:
Integrato ICL 8019 cercasi...
COSTRUIRE HIFI • Leggi argomento - Urge trovare un ICL 8019 !!!
I don't understand, why there are no pdf datasheets about alldatasheets, digchip and datasheetarchive. Perhaps because ICL 8019ACPD" was custom made version?

Please note, the attached 20 bit DAC block diagram is from DP70V instead of DP70, but also discrete version and basicly very similare

SoNic_real_one · 19th March 2010, 06:45 PM

I had the same problem with a PCM1745E (DAC made by BurrBrown). I even asked TI for a datasheet but they politely deined to provide one, saying that was a special order .

tiefbassuebertr · 19th March 2010, 09:20 PM

Quote:

Originally Posted by SoNic_real_one

I had the same problem with a PCM1745E (DAC made by BurrBrown). I even asked TI for a datasheet but they politely deined to provide one, saying that was a special order .

Which CD/DVD/BD Accuphase model uses this type? I think, this type is close to that one of PCM1742 or PCM1748 with slightly different internal low pass filter characteristic

First commonly informations regarded 4-bit D/A converter like ICL8018-8019-8020 I have found here:
http://www.analog.com/static/importe...als/MT-015.pdf

amc184 · 20th March 2010, 04:35 AM

I had a look at making a similar thing to this (a discrete DAC), but somewhat simpler. I think the part you are looking at is probably a shift register that de-serialises the digital signal.

There is such thing as a 4019 4-bit shift register, four of those stacked would make a 16-bit shift register, which fits together with what I would expect to see. A lot of these sort of ICs are no longer available, mainly due to the current prevalence of CPLDs and FPGAs.

If you post some more details, such as the surrounding circuit and some photos of the IC in question, I may be able to suggest a replacement.

tiefbassuebertr · 20th March 2010, 09:22 AM

here I find several informations:
Patent EP0063878
and the same with high resolution text but without showed figures:
(WO/1982/003490) METHOD AND APPARATUS FOR PROCESSING AND PACKAGING DIGITAL DATA

aparatusonitus · 20th March 2010, 11:45 AM

ICL8019A datasheet and Application Note, Data Sheet, Circuit, PDF, Pinout | Datasheet Archive

Bernhard · 20th March 2010, 12:02 PM

It is a 4 bit current switch.
I have 4 x ICL 8018 C in completely gold plated ceramic package, not soldered.
No idea if there is a difference to "A" version.

Email me if you need some. 10 EUR per piece + shipping.

20th March 2010, 11:45 AM	#6
aparatusonitus diyAudio Member Join Date: Jan 2004 Location: Split, Croatia	ICL8019A datasheet and Application Note, Data Sheet, Circuit, PDF, Pinout \| Datasheet Archive __________________ Non é mai abbastanza...

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19th March 2010, 06:45 PM	#2
SoNic_real_one diyAudio Member Join Date: Jan 2008 Location: Virginia	I had the same problem with a PCM1745E (DAC made by BurrBrown). I even asked TI for a datasheet but they politely deined to provide one, saying that was a special order .

20th March 2010, 04:35 AM	#4
amc184 diyAudio Member Join Date: May 2007 Location: Christchurch	I had a look at making a similar thing to this (a discrete DAC), but somewhat simpler. I think the part you are looking at is probably a shift register that de-serialises the digital signal. There is such thing as a 4019 4-bit shift register, four of those stacked would make a 16-bit shift register, which fits together with what I would expect to see. A lot of these sort of ICs are no longer available, mainly due to the current prevalence of CPLDs and FPGAs. If you post some more details, such as the surrounding circuit and some photos of the IC in question, I may be able to suggest a replacement.

20th March 2010, 09:22 AM	#5
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	here I find several informations: Patent EP0063878 and the same with high resolution text but without showed figures: (WO/1982/003490) METHOD AND APPARATUS FOR PROCESSING AND PACKAGING DIGITAL DATA

20th March 2010, 12:02 PM	#7
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	It is a 4 bit current switch. I have 4 x ICL 8018 C in completely gold plated ceramic package, not soldered. No idea if there is a difference to "A" version. Email me if you need some. 10 EUR per piece + shipping.

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