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Old 9th June 2004, 06:40 AM   #1
ergo is offline ergo  Estonia
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Default How to measure the output impedance of the DAC chip

I'd like to know the output impedance of AK4393 DAC chip for correct filter and analog stage simulation.

It is a differential voltage output DAC.

How to measure this?

Also while at the subject what about current output DACs like PCM1704. How to determine their output impedance?

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Ergo
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Old 9th June 2004, 07:59 AM   #2
hjelm is offline hjelm  Sweden
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Do you mean that you want the full Z(freq) impedance?
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Old 9th June 2004, 08:07 AM   #3
ergo is offline ergo  Estonia
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No, basicly I want the value of a resistor I should put in series with either a voltage or current source respectively in simulation...

I know that for an amp one could inject a sine wave of known voltage into the powered amps output through a known resistor and that way determine the output impedance.

I'm not sure if I can do it for DAC chip. Is it sure that I can't damage it? I do not know how they do the output circuit in component level inside the IC.

Ergo
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