Are there any PCI bus interface cards available that employ Wilkinson type ADCs for low DNL ? I'm relating a histogram of the acquired adc binary output code from tens of thousand of measurements to a physical parameter. Performing this on a test triangle wave that spans the entire input range produces a histogram having 10% fluctuations (noise) with periodic spikes larger than that. Apparently due to DNL issues from successive approximation converters (SAR). I'm not looking for one with on-board multi-channel scaling capability.
Steve
