|
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: Why is PCM1792A 2X more expensive tha PCM1795? posted by dave789 on May 4, 2017 at 16:00:34:
As one poster pointed out, the PCM1795 chip is "32-bit" only in the sense that the input buffer will accept 32-bit data. That theoretically correlates to a 192 dB S/N ratio, which is obviously just a marketing gimmick and not even close to possible in the real world.
Of greater importance is that the '1792A outputs twice as much current as the '1795. This is because there are twice as many current sources in the output stage (or the same number but that are twice the size). The result is ~6 dB better S/N ratio (all else being equal), or the equivalent of one more bit of true resolution (not marketing resolution). Twice the number (or size) of current sources requires twice the space on the silicon wafer for each die. That means each wafer yields roughly 2x as many '1795 dice as '1792A dice, so TI needs to charge twice as much for the '1792A.
Hope this helps.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Because the die is twice as large in the PCM1792A - Charles Hansen 22:45:51 05/06/17 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
