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Old 18th March 2013, 06:46 PM   #1
jtktam is offline jtktam  Canada
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Default cDAC+

cDAC+ prototype board

our first custom product!

ESS Sabre ES9023 DAC chip
Tenor TE7022 USB interface chip.
usb galvanic isolation
line level analog output

pricing / availability soon!

-joe
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Old 18th March 2013, 07:07 PM   #2
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Looks like ODAC with galvanic isolation :P Any chance to measurements?
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Old 18th March 2013, 07:22 PM   #3
jtktam is offline jtktam  Canada
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unfortunately i don't have the equipment or the expertise to do the measurement tests.

yes.. it is a like an odac with galvanic isolation

-joe
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Old 30th March 2013, 02:41 PM   #4
jtktam is offline jtktam  Canada
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Boards are at the assembler.. things are coming along

cDAC+ is built around three components

Tenor TE7022L UAC1 engine
ESS Technology ES9023 24 bit DAC
Analog Devices ADUM4160 usb digital isolator

the footprint is designed to fit inside Hammond 1551KTBU (translucent blue) or 1551KBK/1551KGY (black/grey) enclosure.

due to the size of the enclosure, rca jacks can not be hard mounted to the enclosure. I envision the box to be built as part of a usb <-> rca cable, making this a true cable dac.

I don't have the equipment to do the measurements. I have sent the prototype board out to my existing odac customers and the feedback has been very good.

---

the first 100 units will be sold as kits with a standard 5v wall wart, the 1551KTBU case, pricing will be posted as soon as I get the final landing costs for the first shipment.

I will be working on a "reference" design with regulated power supply, that is meant for those who will built it into a larger enclosure and wants to get the last bit of performance out of the dac.
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Old 1st May 2013, 09:28 PM   #5
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Awesome job! Very excited about this. Was going to try to mod an ODAC like this.

With the DC in, I assume it would benefit from a linear regulated psu?

For your reference are you simply going to build the linear regulated psu onto the board?

Any idea on how sensitive this might be to interference? I'd like to mount one inside and amp case.
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Old 3rd May 2013, 04:27 PM   #6
jtktam is offline jtktam  Canada
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Quote:
Originally Posted by fraggler View Post
Awesome job! Very excited about this. Was going to try to mod an ODAC like this.

With the DC in, I assume it would benefit from a linear regulated psu?

For your reference are you simply going to build the linear regulated psu onto the board?

Any idea on how sensitive this might be to interference? I'd like to mount one inside and amp case.
I am not building the linear regulated psu onto the board..

the standard build will use a wall wart..

the reference build will be using a tracking linear all discrete power supply in a desktop case (possibliy with buffer output)

I would definitely mount this inside a small metal case before putting into an amp case..

-joe
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Old 31st May 2013, 01:24 PM   #7
jtktam is offline jtktam  Canada
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Reviews from buyers have been very positive.. get yours today!
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Old 21st July 2013, 08:54 PM   #8
JZatopa is offline JZatopa  United States
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Will the usb galvonic isolation prevent ground loops? I think that is what took out my odac.
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Old 13th August 2013, 07:17 PM   #9
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Hello! I have a question for you.

I have a B-Board buffer and psu almost done, and I would like to use this as an output for a dac. Could I use your cDac and power it from the B-Board Z-Reg outputs? They supposedly put out a regulated 11vdc. If so it would be awesome, everything go nicely together in a GX248 chassis I have leftover...


Kenneth
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Old 20th August 2013, 10:50 PM   #10
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Do not apply more than 5vdc to cDAC+. The AdUM3160 is only rated for 5vdc supply.

George
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