Baron Slater
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- Feb 27, 2020
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"They typically haven't had very good execution...leading to very poor measured results."
So a PCM1704 has poor measured results?!?
So a PCM1704 has poor measured results?!?
"They typically haven't had very good execution...leading to very poor measured results."
So a PCM1704 has poor measured results?!?
So a PCM1704 has poor measured results?!?
What is so difficult to understand?
That's where you're mistaken. Resistor trimming alone can only take you so far. You then have to account for the remaining mismatch, drift, temperature gradients, etc. A couple of designs have managed to achieve very low distortion figures through (presumably individual) calibration and digital compensation. This takes a huge amount of engineering effort, and the resulting product is very expensive to make. Why do things the hard way?A 24 bit ladder has a native resolution of 24 bit (proving the resistors can be trimmed precisely enough). No feedback or signal processing is present.
Same performance cheaper is a very reasonable definition of better. The ES9038PRO costs $75 for samples which means it can probably be had for about $35 in 1k quantities. The Moolah-Moolah DAC has three ADI Sharc DSPs that cost about $20 each plus a bunch of other expensive parts.Exactly what I intended with my original post. DS is cheaper. Not "better" as was implicated throughout the thread.
I am unaware of pricing but apparently a top notch DS like ESS sabre is apparently not exactly cheap.
The resistor ladder in these has a native resolution of 256 possible values or steps. The rest is apparent resolution through the use of signal processing and feedback.
"A couple of designs have managed to achieve very low distortion figures through (presumably individual) calibration and digital compensation."
Interesting. Which designs are that?
There is no mention of digital signal processing in the datasheet.
Don't drink and drive.No automotive or wine analogies ?
Of course I didn't. If whatever requirement you have is met by several options, the cheaper alternative is generally considered better.I sure hope you didn't mean "better sounding" ..? When starting this discussion. Or are you simply comparing the techniques.
I guess you don't understand how amplifiers work either.As an analogy:
If an amplifier with 0.01% THD can be built with transistors that are linear enough not require feedback i would prefer that over less linear transistors and lots of feedback.
I fail to see how using less linear transistors and a lot of feedback is better.
From a technical point of view I would prefer the first option as being more elegant and less complex.
Whether they sound the same I dunno but I'd sleep better