24 bit 356 kHz DA converter

martioz · 13th March 2003, 01:30 AM

Please explain to me, which DAC chip provides performance up to 24 bit 356 kHz DA as quoted by CEC?

rfbrw · 13th March 2003, 03:09 AM

Any dac intended to be connected to a 24bit 8x oversampling filter fed with 44k1 datastream .i.e PCM1704 and any of the delta-sigma dacs that have an optional 8x input e.g the CS4397

ray.

scraggles · 13th March 2003, 03:20 AM

Could you make recomendations of a quality design that acheives this? Ideally one with pcb layouts, but not really necessary.

Also what modification would be appropriate to light an LED on the front panel to show the sample frequency? My current teac dac does this, and I'm planning gutting it and replacing with a better more modern design.

TIA
Scraggles

rfbrw · 13th March 2003, 08:28 PM

I only know of two relevant designs on the net. For the first I cannot remember the title of the thread but do a search under
'pquadrat and PCM1704'. The second is Dave Broadhurst's dac which you will find at
http://www.geocities.com/capecanaver.../24bitdac.html
You display the frequency information using a LED by decoding the information provided by the input receiver or if there is no receiver you can use a small microcontroller. The receiver datasheets and application notes will have examples as to how to decode the frequency information.

ray.

martioz · 14th March 2003, 01:27 AM

Done a search, link here:

http://www.diyvideo.com/forums/showt...light=pquadrat

but can’t view the schematics

Are this schematics build able?

Can anyone direct me to a correct link?

rfbrw · 14th March 2003, 02:17 AM

Try here.
http://www.diyaudio.com/forums/showt...655#post126655
and here
Upsampling DIY DAC with AD1896

scraggles · 14th March 2003, 04:06 AM

excellent, thanks for the links Ray.
Pquadrat's build looks a real goer. I think I'll hang on and wait for the buyers of the "seven boards" to post some feedback. I'm really interested to hear some reports on how it sounds and what, if any, improvements could be made.

Hopefully Pquadrat will produce some more boards or/and post his gerber files.

All I need then is to add frequency display and RC5 controled input switching to integrate it fully into the rest of my system.

scraggles · 20th March 2003, 04:21 AM

Can anybody point me in the direction of a supplier of the PCM1704U-K

??

The only on I can find is Digikey, who quote an estimated delivery date of 26th May

I'm in UK BTW

rfbrw · 20th March 2003, 04:55 AM

Try , http://www.viewcom.force9.co.uk/index.htm. The higher grade devices may prove to be special order items though.
Alternatively, there is the long list of sales distributors on the TI website e.g. http://www.abacus.co.uk/products.html

tube-lover · 13th December 2004, 04:47 AM

Dear scraggles ,

If U like to get the CS8412 (laterest version with date code 0204) 8414, 8420.

Oscillator 11.2896 & 24.5760M 30ppm made in japan.
DF 1704, 1706.
AD1853 or standard PCM1704.

pls ask to me.

I can offer a good price to Diyers.

thanks

thomas

13th March 2003, 01:30 AM	#1
martioz diyAudio Member Join Date: May 2002 Location: Melbourne	24 bit 356 kHz DA converter Please explain to me, which DAC chip provides performance up to 24 bit 356 kHz DA as quoted by CEC?

13th March 2003, 03:20 AM	#3
scraggles diyAudio Member Join Date: Mar 2003 Location: Hampshire	can someone suggest a good design/kit Could you make recomendations of a quality design that acheives this? Ideally one with pcb layouts, but not really necessary. Also what modification would be appropriate to light an LED on the front panel to show the sample frequency? My current teac dac does this, and I'm planning gutting it and replacing with a better more modern design. TIA Scraggles

20th March 2003, 04:21 AM	#8
scraggles diyAudio Member Join Date: Mar 2003 Location: Hampshire	source of PCM1704U-K ?? Can anybody point me in the direction of a supplier of the PCM1704U-K ?? The only on I can find is Digikey, who quote an estimated delivery date of 26th May I'm in UK BTW

13th December 2004, 04:47 AM	#10
tube-lover diyAudio Member Join Date: Jul 2004 Location: Hong Kong	24 bit 356 kHz DA converter Dear scraggles , If U like to get the CS8412 (laterest version with date code 0204) 8414, 8420. Oscillator 11.2896 & 24.5760M 30ppm made in japan. DF 1704, 1706. AD1853 or standard PCM1704. pls ask to me. I can offer a good price to Diyers. thanks thomas

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13th March 2003, 03:09 AM	#2
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	Any dac intended to be connected to a 24bit 8x oversampling filter fed with 44k1 datastream .i.e PCM1704 and any of the delta-sigma dacs that have an optional 8x input e.g the CS4397 ray.

13th March 2003, 08:28 PM	#4
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	I only know of two relevant designs on the net. For the first I cannot remember the title of the thread but do a search under 'pquadrat and PCM1704'. The second is Dave Broadhurst's dac which you will find at http://www.geocities.com/capecanaver.../24bitdac.html You display the frequency information using a LED by decoding the information provided by the input receiver or if there is no receiver you can use a small microcontroller. The receiver datasheets and application notes will have examples as to how to decode the frequency information. ray.

14th March 2003, 01:27 AM	#5
martioz diyAudio Member Join Date: May 2002 Location: Melbourne	Done a search, link here: http://www.diyvideo.com/forums/showt...light=pquadrat but can’t view the schematics Are this schematics build able? Can anyone direct me to a correct link?

14th March 2003, 02:17 AM	#6
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	Try here. http://www.diyaudio.com/forums/showt...655#post126655 and here Upsampling DIY DAC with AD1896

14th March 2003, 04:06 AM	#7
scraggles diyAudio Member Join Date: Mar 2003 Location: Hampshire	excellent, thanks for the links Ray. Pquadrat's build looks a real goer. I think I'll hang on and wait for the buyers of the "seven boards" to post some feedback. I'm really interested to hear some reports on how it sounds and what, if any, improvements could be made. Hopefully Pquadrat will produce some more boards or/and post his gerber files. All I need then is to add frequency display and RC5 controled input switching to integrate it fully into the rest of my system.

20th March 2003, 04:55 AM	#9
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	Try , http://www.viewcom.force9.co.uk/index.htm. The higher grade devices may prove to be special order items though. Alternatively, there is the long list of sales distributors on the TI website e.g. http://www.abacus.co.uk/products.html

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