SV: Re: SV: Re: SV: Re: [sdiy] Good 16 bits A/D choice for mono audio recording

[karl dalen]

Exactly what i thought to, and i would be supriced if even
16bits (in a harsh environment)could be approached.

Reg
KD

--- Eric Brombaugh <ebrombaugh at earthlink.net> skrev:

> Karl,
> 
> Good question. Studying the datasheet I see that they're quoting 
> +/-15ppm INL which is closer to 16-bit resolution than 24. A bit more 
> digging suggests that the part is really only accurate to 18 bits.
> 
> So the answer is no - some of those 24 bits are worthless. Audio rate 
> codecs aren't much better - 24-bit ADC/DAC combinations are pretty cheap 
> these days, but unless you're picking the parts carefully and 
> surrounding them with high-quality drivers & supplies you'll never get 
> the kind of accuracy that simply counting bits would suggest.
> 
> Eric
> 
> karl dalen wrote:
> > Yes i know, but my question was can these 24 bits be used in practice?
> > CMOS process and all kind of internal switching noise?!
> > 
> > KD
> > 
> > --- Eric Brombaugh <ebrombaugh at earthlink.net> skrev:
> > 
> >> Karl,
> >>
> >> That's true. the ADUC824 has a 24-bit Sigma-Delta ADC on-chip, along 
> >> with an 8051 core and a 12-bit DAC. Unfortunately, the sample rate of 
> >> the ADC is only about 20Hz at higher resolutions. Useful for precision 
> >> instrumentation measurements, but not nearly fast enough for J-P's audio 
> >> digitizing application.
> >>
> >> Eric
> >>
> >> karl dalen wrote:
> >>> Ad has the Aduc series of MCU's some have 24bit sigma-
> >>> delta AD but can these 24 bits in practice be realized? 
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