USB SPDIF TOS Conversion IC wanted

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Wookie

Posted: Fri Feb 02, 2007 10:07 am

Guest

Folks,

I'm looking for an IC which can convert a USB audio stream to SPDIF
(TOS). Texas Instruments Burr Brown has the PCM2704, which does the
job ->
<http://www.datasheetcatalog.com/datasheets_pdf/P/C/M/2/PCM2704.shtml>

My problem: the USB part needs to act as USB host, but the PCM2704 is
a USB client only.

I need either
a) something like the PCM2704, but with USB host capabilities or
b) USB client, but cheaper than the PCM2704

I could also live without the analogue output which the PCM2704
provides. All I need is USB to SPDIF.

Best,
André

Roger Hamlett

Posted: Fri Feb 02, 2007 5:29 pm

Guest

Quote:

I'm looking for an IC which can convert a USB audio stream to SPDIF
(TOS). Texas Instruments Burr Brown has the PCM2704, which does the
job -
http://www.datasheetcatalog.com/datasheets_pdf/P/C/M/2/PCM2704.shtml

My problem: the USB part needs to act as USB host, but the PCM2704 is
a USB client only.

I need either
a) something like the PCM2704, but with USB host capabilities or
b) USB client, but cheaper than the PCM2704

I could also live without the analogue output which the PCM2704
provides. All I need is USB to SPDIF.
The problem here is that a 'USB host', needs a specific driver for every

device it is to talk to. There is no 'standard' for different audio
devices regarding the format that the data is sent over USB, so the driver
would need to be custom written to talk to whatever client device you
intended to ge the data from. Generating the SPDIF stream, would be
relatively easy for any processor. What you want could be done by the FTDI
Vinculum core, but would need a very significant amount of programming to
handle the USB...

Best Wishes

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