The AD5339 are dual 12-bit buffered voltage output DACs, respectively. Each part is housed in an 8-lead MSOP package and operates from a single 2.5V to 5.5V supply, consuming 250uA at 3V. On-chip output amplifiers allow rail-to-rail output swing with a slew rate of 0.7V/us. A 2-wire serial interface operates at clock rates up to 400kHz. This interface is SMBus compatible at VDD <3.6V. Multiple devices can be placed on the same bus.

The references for the two DACs are derived from one reference pin. The outputs of all DACs can be updated simultaneously using the software LDAC function. The parts incorporate a power-on reset circuit to ensure that the DAC outputs power up to 0V and remain there until a valid write to the device takes place. A software clear function resets all input and DAC registers to 0V. A power-down feature reduces the current consumption of the devices to 200nA at 5V (80nA at 3V).