|
Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
|
|
|
Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
|
In Reply to: RE: Thankfully the board in question comes with choice of... posted by Tony Lauck on September 9, 2015 at 20:06:29:
>" I would never say anything good about a NOS DAC that runs at 44 kHz."
Agree with the 44kHz sample rate, but I need more experience with NOS and ladder dacs. Your opinion is duly noted.
>" The photos show a "perfect" square wave, which is not a correct analog signal that can be encoded in a digital format."
That's something I've never heard anyone say before, but I've thought something along those lines for a long time. That testing a dac's or amplifiers performance using odd order harmonics probably is not the best way to do it.
>" If you had a waveform for a sine wave at high frequency shown over multiple cycles you would see a wavy envelop caused by beating between the true signal and the image."
This sounds like a better way to test dac's and amplifiers. If I ever posted any of this on the SET forum there would be an awful blood (mine) bath.
Today I looked for the resistor tolerance specs in the AD 5791 datasheet, but I couldn't find it. I did find the following;
>"The six MSBs of the 20-bit data-word are decoded to drive 63 switches, E0 to E62. Each of these switches connects one of 63 matched resistors to either the VREFP or VREFN voltage. The remaining 14 bits of the data-word drive the S0 to S13 switched of a 14-bit voltage mode R-2R ladder network."
That sounds to me like it's only 14 bits of R2R not the 20 bits advertised. Am I wrong on this, or is that the standard way?
Thanks.
---------------------------------------------------------------
Big speakers and little amps blew my mind!
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: Thankfully the board in question comes with choice of... - Mr_Steady 16:06:40 09/10/15 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
