The LTC1655LIS8#PBF is a rail-to-rail voltage output 16-bit Digital-to-analog Converter includes an output buffer and a reference. The 3-wire serial interface is compatible with SPI/QSPI and MICROWIRE? protocols. The CLK input has a Schmitt trigger that allows direct optocoupler interface. The LTC1655 has an on board 2.048V reference that can be overdriven to a higher voltage. The output swings from 0 to 4.096V when using the internal reference. The typical power dissipation is 3mW on a single 5V supply. The LTC1655L has an on board 1.25V reference that can be overdriven to a higher voltage. The output swings from 0 to 2.5V when using the internal reference. The typical power dissipation is 1.8mW on a single 3V supply. It is pin compatible with Linear Technology 12-bit VOUT DAC family allowing an easy upgrade path.