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-   -   what's the output impedance of a LM6171? (http://www.diyaudio.com/forums/digital-source/9459-whats-output-impedance-lm6171.html)

deskmate88 4th January 2003 06:48 PM

what's the output impedance of a LM6171?
 
From the data sheet, the open loop output impedance is around 15ohm.

However, how does this change when the LM6171 is use as a simple inverting amplifier with a 1K2 feedback resistor?

(Used after the DAC current output to do the I/V conversion and amplify the voltage.)

Thanks

hitsware 4th January 2003 08:54 PM

for practical purposes 0 ohm as long as you don't try to draw too much current.......

deskmate88 5th January 2003 04:38 AM

thanks
 
As I am designing a passive filter after the opamp, can I assume the output impedance is zero? Because the filter compoments' values do depends on this output impedance.


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