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3rd December 2004, 07:12 AM
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#1 |
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diyAudio Member
Join Date: Mar 2004
Location: Leuven
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dac output behaviour
Hi
I'm trying to find a way to describe how the current outputs of a dac behave (e.g. TDA1541 or even TDA1547). I'm pretty sure they're not perfect current sources...  So how would you approximate them? A8
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6th December 2004, 03:47 PM
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#3 |
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diyAudio Member
Join Date: Mar 2004
Location: Leuven
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I Think they're more perfect current sources (AC and DC for offsets) with a parallel resistor...
After all they are a bunch of switched capacitors, which store charge and deliver current into a load (=I/V resistor) Unfortunately I have no idea how to check this (measure it). Got some info on how TDA1541 is supposed to look like, used a similar model for the 1547 dac outputs and the results seem to match the datasheets after some tweaking.  A8
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