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Old 16th November 2005, 04:28 PM   #1
wongmb is offline wongmb  Canada
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Join Date: Nov 2005
Default Opamp affects digital out ??

I am a newbie and I have the following question regarding opamp ?
If I use the digital out on my CDP only, does changing the opamp makes a difference ? Of is it used only on the analog stage ?
I am looking to swap the OPA2604 to OPA627.

Thanks
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Old 16th November 2005, 05:48 PM   #2
bocka is offline bocka  Germany
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Join Date: Jul 2003
Location: Hannover
Quote:
If I use the digital out on my CDP only, does changing the opamp makes a difference ?
No, because it's not inside the signal path.

Quote:
I am looking to swap the OPA2604 to OPA627.
That's only a waste of money. Better go for a good dinner!
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Old 17th November 2005, 01:41 PM   #3
Jay is offline Jay  Indonesia
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Join Date: Feb 2003
Location: Jakarta
Hi wongmb,

The OPA2604 is dual op-amp (OPA627 is single). In general you should replace op-amps with the same type. For example, OPA2604 with OPA2134.

If you use the digital out on your CDP, then this digital signal will be converted to analog signal somewhere (eg. in your DAC box). Right after this DAC, you will probably find an op-amp. There you can replace with your OPA627 if it were single op-amp.
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