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I/V - op amp offset influence on DAC performance ?

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jan.didden

jan.didden

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Joined 2002
linearaudio.nl
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Bernhard said:
Hi,

most op amps including OPA627 have significant offset.
Does that degrade linearity of DAC chips like TDA1541 or other multibit chips ?
It should degrade R-2R DAC.
Click to expand...


Bernhard,

Significant offset? Surely not more then a couple of mV? I know DACs don't like offset at their current output (therefore one must be carefull using just an I/V resistor), but a few mV wouldn't matter I would think.

Jan Didden
 
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