U U LTC1594/LTC1598 4- and 8-Channel, Micropower .
LTC1594 - 4- and 8-Channel/ Micropower Sampling 12-Bit Serial I/O A/D Converters
LTC1594L - 4- and 8-Channel/ 3V Micropower Sampling 12-Bit Serial I/O A/D Converters