The LTC1448CS8#PBF is a dual rail-to-rail voltage output 12-bit Digital-to-analog Converter (DAC) includes rail-to-rail output buffer amplifiers and an easy-to-use 3-wire serial interface. The LTC1448 has an external reference input pin (REF) and its outputs swing from 0V to REF. The REF input can be tied to VCC providing rail-to-rail operation from supplies of 2.7 to 5.5V.
Schmitt trigger on clock input allows direct optocoupler interface
