I'm looking for an < $100 USB analog to digital converter device with
16 or more bits of voltage resolution that provides its digitized data to computer at periodic timed intervals. My fastest rate would be 10 Hz. One channel is enough, +/- 1 volt input range is ok.A hardware clocked device, perhaps with some small on-board memory buffer would be ideal. This would avoid the missed sample periods that can result from software timed clocked schemes that are subject to missed periods when other large application are opened, the user drags a scrolbar around, etc. There are several inexpensive delta-sigma adc's available for example. Does say a microcontroller design exist which incorporates a hardware clock to provide periodic timed conversions ? Software dll, ActiveX, or LabVIEW driver needed.