Re: [sdiy] Re: Re: [sdiy] presets & patching > co mbining 2 replie s

[Roman]

recently introduced ADS1271 from TI.
According to marketing bullshit it combines audio converter speed with industrial converter accuracy. Here are some claimed parameters:
INL 15ppm
offset error 150uV
gain error 0.1%
all temp. drifts about 2uV/C
SNR 106dB
sample rate up to 105kHz
price not known yet

But anyway you could use common audio converters and implement correcttion coefficients in firmware for each gain and offset errors. That's only one 'add' and one 'multiply' more per converter. We don't care what is numeric representation of the signal, we only want output matching input.

Roman

---- Wiadomość Oryginalna ----
Od: Colin f <colinf at nildram.co.uk>
Do: synth-diy at dropmix.xs4all.nl
Data: Tue, 16 Nov 2004 9:30:38 +0100
Temat: Re: [sdiy] Re:  Re: [sdiy] presets & patching > co mbining 2 replie  s

>> And now something that may kick me out of this forum:
>> Make an array of 10ADCs and 10DACs. Say any 24/192 depending on your
>choice. Feed them all into DSP and make matrix in firmware.
>> That's cheaper and way smaller than 100VCAs and 100CVs to controll them,
>not to mentiom the crosspoints in themselves.
>
>That's an idea I considered a while back, when I saw the prices some of the
>multi-IO sound card and multichannel ADC/DACs were falling to.
>But I'm told it's prohibitively expensive to get convertors with good DC
>performance of the sort you'd need to handle CVs as well as audio signals.
>
>Cheers,
>Colin f
>
>
>
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