Hi! I'm looking for a high resolution (ideally 24 bit) DAC to use in a low drift DC voltage source. I don't believe a sigma-delta converter is appropriate for this job (although perhaps someone could convince me otherwise). Does anyone have any suggestions? I've checked with my usual suspects (Analog, TI/Burr-Brown, Maxim), and haven't seen anything that looks appropriate.
I don't think you're going to find anything but sigma-delta ADCs at this resolution (for any sort of reasonable price anyway). Look at ADI again. They have 24-bit ADCs made for measuring DC all the way up to multi-megahertz sampling ones.
Marc
but sigma-delta ADCs at
My bad... I read the original post too fast and took DAC for ADC. ADI probably still has what you're looking for, but I am less familiar with their DAC offerings.
Mea culpa, Marc
This is 1 part in 16.7 million! Do you actually need that resolution, or that accuracy? If you need the accuracy, then you are going to find this assignment real difficult. Everything in the main signal chain is going to have to be stable to that level. If this were a 10 V max power supply, then the output would have to be stable, or accurate, to half of a microvolt! You won't even be able to breath on the thing without inducing thermoelectric voltages that swamp that by an order of magnitude.
Jon
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