On 12 Mar 2014, at 15:53, Theo Verelst <theo...@theover.org> wrote: > A DA converter with 20 bits (actual) accuracy, pretty low noise, and a > settling time of 1 microsecond, driven by more or less standard 3 wire > interface: > http://www.analog.com/en/digital-to-analog-converters/da-converters/ad5791/products/product.html > (eval board: http://www.analog.com/en/evaluation/eval-ad5791/eb.html )
That doesn’t mean it has a usable sample rate up to 1 MHz. After 1 us, the glitch is over and you can turn on your S/H stage to take over the value. Without a S/H stage, you have a nice noise floor from the glitches. IMO, for 100 or 200 kHz, it might be workable, but not 1 MHz. > > And an AD converter with 2.5 MS/S and 24 bits accuracy sigma delta which > should be great for measurements and undisputably great sampling behavior for > perfect delay lines, etc.: > > http://www.analog.com/en/analog-to-digital-converters/ad-converters/ad7760/products/product.html > (eval board: http://www.analog.com/en/evaluation/eval-ad7760/eb.html ) > Sure, but no antialiasing filters up front. How about clocking the whole show, etc. Take this one: http://www.analog.com/en/codec-afe/audio-codecs/ad1939/products/product.html Group delay can go down to 0.5 ms.That’s about 17 cm audio thru air …. Best, Steffan -- dupswapdrop -- the music-dsp mailing list and website: subscription info, FAQ, source code archive, list archive, book reviews, dsp links http://music.columbia.edu/cmc/music-dsp http://music.columbia.edu/mailman/listinfo/music-dsp
