New one from AD AD5780 R2R 18bit - diyAudio
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Old 25th July 2012, 04:02 AM   #1
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Default New one from AD AD5780 R2R 18bit

Any good??

http://www.analog.com/static/importe...ets/AD5780.pdf

Cheers George
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Old 26th July 2012, 08:44 PM   #2
Shinja is offline Shinja  Japan
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they have excellent INL/DNL and noise performance, indeed.
but their THD / SFDR may not be as good as.
I found SFDR/THD spec on AD5781/5791's datasheet.

Spurious Free Dynamic Range:100dB @1 kHz tone, 10 kHz sample rate
Total Harmonic Distortion:97dB @1 kHz tone, 10 kHz sample rate

This is not better than old PCM58P...

These spec may improve with deglitching and so on technics.
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Old 26th July 2012, 09:34 PM   #3
jcx is online now jcx  United States
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odd test spec - maybe inadequate anti-image filter for 10 KHz sample rate?

for a "1 usec settling" DAC 100-200 KHz should be fine, hard to imagine what dynamic errors would show up 100x below rated settling time
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Old 27th July 2012, 03:30 AM   #4
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The dac is very clearly an instumentation/industrial purpose chip, hence measured & optimised for a bit different set of specs. Don't think one could say if it would be good or bad for audio without trying it.
If UltraAnalog were still in business, they would likely take this chip & seal it up in epoxy with some peripheral circuits & call it a $200 hybrid dac module.;-)
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