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Old 3rd October 2011, 10:59 AM   #1
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Default Voltage level of DAC output

I am a newbie and reading the spec of DACs makes me very confused.

Some DACs output 5Vrms (balanced) and some output 2V peak to peak (balanced). Some claim the output impedance is 100ohms and some claims 2ohms. That means the difference is big. Is there any international standard to govern the DAC output?

Thanks for reading.
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Old 3rd October 2011, 11:58 AM   #2
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Quote:
Originally Posted by mrbear View Post
I am a newbie and reading the spec of DACs makes me very confused.

Some DACs output 5Vrms (balanced) and some output 2V peak to peak (balanced). Some claim the output impedance is 100ohms and some claims 2ohms. That means the difference is big. Is there any international standard to govern the DAC output?

Thanks for reading.
I'm not aware of any international standard output. While there is a very common single-ended output level of 2Vrms, that is not a standards based requirement. There's nothing resembling a standard output impedance. DAC output impedance can and does vary greatly, just as it does for active preamp output impedance. Output signal level and impedance are usually non-consequential unless one will be using a passive preamp.
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Last edited by Ken Newton; 3rd October 2011 at 12:07 PM.
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Old 3rd October 2011, 03:20 PM   #3
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Thank you for the reply.
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