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Old 29th September 2011, 11:06 AM   #1
merlin el mago is offline merlin el mago
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Question Legato for PCM1704

Wich be the right input voltage for Legato driving unbalanced BB PCM1704?
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Old 30th September 2011, 11:40 AM   #2
Russ White is offline Russ White  United States
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The the input bias to 0V (or close).

Which version of legato?
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Old 30th September 2011, 12:06 PM   #3
merlin el mago is offline merlin el mago
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Sorry I forgot, Version 1.0.3
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Old 30th September 2011, 12:43 PM   #4
Russ White is offline Russ White  United States
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Will you be using balanced output or single ended only?
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Old 30th September 2011, 02:11 PM   #5
merlin el mago is offline merlin el mago
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PCM1704 is single ended
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Old 30th September 2011, 02:53 PM   #6
Russ White is offline Russ White  United States
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Ahh, I see. Well you could still use Legato, but the BAL/SE stage you would want to completely omit.
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Old 30th September 2011, 02:58 PM   #7
merlin el mago is offline merlin el mago
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Only it's necessary the input bias to 0V (or close)?

It's not necessary ground the input - (cold)?

No need to change some resistor CCS & I/V?

Last edited by merlin el mago; 30th September 2011 at 03:10 PM.
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Old 30th September 2011, 03:22 PM   #8
Russ White is offline Russ White  United States
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I would have to look at the datasheet. I simply don't have time at the moment. If you grounded one end (-end is fine) then it should work, but it would definitely not be ideal. Your going to have to research this yourself for the moment.
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Old 30th September 2011, 03:35 PM   #9
merlin el mago is offline merlin el mago
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Thank you, only one question more: wich are CCS Rs (R6-R8) & I/V Rs (R21-R24)?
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Old 1st October 2011, 02:43 PM   #10
Russ White is offline Russ White  United States
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Quote:
Originally Posted by merlin el mago View Post
Thank you, only one question more: wich are CCS Rs (R6-R8) & I/V Rs (R21-R24)?
R20,R21 R23,R24 are CCS

R1-R4 are I/V
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