We just had a visit from a manufacturer's rep for a device with claimed 20-bit A/D performance. He had a board in-hand, and I could see no A/D chip. I couldn't get a good enough look at the markings on the main chip to identify it.
I wasn't aware of micros that incorporated 20-bit/24-bit A/D (probably sigma-delta?). If y'all know of any, pop out a few examples. Thanks.
(Of course, when we look at something cool we immediately think "well, WE could do that" with a bit of reverse-engineering...)