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Old 13th March 2003, 12:30 AM   #1
martioz is offline martioz  Australia
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Default 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?
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Old 13th March 2003, 02:09 AM   #2
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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.
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Old 13th March 2003, 02:20 AM   #3
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Default 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
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Old 13th March 2003, 07:28 PM   #4
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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.
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Old 14th March 2003, 12:27 AM   #5
martioz is offline martioz  Australia
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Done a search, link here:

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

but canít view the schematics
Are this schematics build able?


Can anyone direct me to a correct link?
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Old 14th March 2003, 01:17 AM   #6
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Try here.
http://www.diyaudio.com/forums/showt...655#post126655
and here
Upsampling DIY DAC with AD1896
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Old 14th March 2003, 03:06 AM   #7
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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.
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Old 20th March 2003, 03:21 AM   #8
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Default 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
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Old 20th March 2003, 03:55 AM   #9
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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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Old 13th December 2004, 03:47 AM   #10
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Default 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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