The AD5641， a member of the nanoDAC? family， is a single， 14-bit， buffered， voltage-out DAC that operates from a single 2.7 V to 5.5 V supply， typically consuming 75 μA at 5 V. The part comes in tiny LFCSP and SC70 packages. Its on-chip precision output amplifier allows rail-to-rail output swing to be achieved. The AD5641 uses a versatile 3-wire serial interface that operates at clock rates up to 30 MHz and is compatible with SPI?， QSPI?， MICROWIRE?， and DSP interface standards. The reference for AD5641 is derived from the power supply inputs and， therefore， gives the widest dynamic output range. The part incorporates a power-on reset circuit， which ensures that the DAC output powers up to 0 V and remains there until a valid write to the device takes place. The AD5641 contains a power-down feature that reduces current consumption typically to 0.2 μA at 3 V， and provides software-selectable output loads while in power-down mode. The part is put into power-down mode over the serial interface. The low power consumption of the part in normal operation makes it ideally suited to portable battery-operated equipment. The combination of small package and low power makes this nanoDAC device ideal for level-setting requirements such as generating bias or control voltages in space-constrained and power-sensitive applications