Olin Lathrop wrote: > Note that a full 16 bits implies 96dB signal to noise ratio. > Try finding an A/D that can do that. 24-bit delta-sigma converters, both low-speed ones and those intended for audio applications, regularly achieve 110-120 dB SNR or even more. -- Dave Tweed -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.