The SP574B/674B/1674B/774B (SPx74B) Series are complete 12bit successiveapproximation A/D converters integrated on a single die with tri-state output latches, an internal reference, clock and a samplehold. The new "BSeries" features true Nyquist sampling while maintaining compatibility with prior versions. They are dropin replacements for the older 574A/ 674A/1674A/774A type devices.