PCM2707 Analogue Audio Out Confusion - diyAudio
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Old 11th September 2010, 11:16 AM   #1
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Location: Truro, Cornwall, UK
Default PCM2707 Analogue Audio Out Confusion

I've been playing with a PCM2707, and I know from other threads that others on this board have too!

I've configured it as USB powered, because I figured there was less chance of blowing stuff up!

The thing I'm confused by is that I only get analogue audio out when FSEL (9) is tied high. According to the datasheet FSEL decides weather the data output is SPDIF (high) or I2S (low). Can anyone shed any light on this?

Tony
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Old 13th September 2010, 05:46 AM   #2
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That means your DAC is working fine.

Its supposed to disable audio out when I2S output is enabled (because presumably you would want to use another better DAC for the actual digi-analog conversion if you were in I2S mode).

It says that somewhere in the datasheet...
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Old 16th September 2010, 09:30 PM   #3
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...but that contradicts the example circuit on page 30 of the datasheet!
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Old 16th September 2010, 11:24 PM   #4
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There a set up configuration that lets you have both i2s and audio. I cant remember what pins but why worry about it you've got a working DAC
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Old 21st May 2012, 09:53 AM   #5
artur36 is offline artur36  Portugal
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Quote:
Originally Posted by wiredcharlie View Post
I've been playing with a PCM2707, and I know from other threads that others on this board have too!

I've configured it as USB powered, because I figured there was less chance of blowing stuff up!

The thing I'm confused by is that I only get analogue audio out when FSEL (9) is tied high. According to the datasheet FSEL decides weather the data output is SPDIF (high) or I2S (low). Can anyone shed any light on this?

Tony
Hi was planning to have a pcm2707 chip outputting analogue line to an external amplifier, is this your setup? Can you please show me the schematics or the pcb design, so i can make one similar to you
Thanks
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Old 22nd May 2012, 10:10 PM   #6
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Join Date: Nov 2006
Location: Lyon
Hi artur36
Have a look there :
The GrubDAC
You could use Analog output.
Easy and cheap

Last edited by korben69; 22nd May 2012 at 10:15 PM.
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