AD5311

The AD5301/AD5311/AD5321 are single 8-, 10- and 12-bitbuffered voltage-output DACs that operate from a single +2.5 Vto +5.5 V supply consuming 120 mA at 3 V. The on-chip outputamplifier allows rail-to-rail output swing with a slew rate of0.7 V/ms. It uses a 2-wire (I2C compatible) serial interface thatoperates at clock rates up to 400 kHz. Multiple devices canshare the same bus.

The reference for the DAC AD5301/AD5311/AD5321 is derived from the power supplyinputs and thus gives the widest dynamic output range. Theseparts incorporate a power-on-reset circuit, which ensures thatthe DAC output powers-up to zero volts and remains there untila validwrite takes place. The parts contain a power-down featurewhich reduces the current consumption of the device to 50 nAat 3 V and provides software-selectable output loads while inpower-down mode.

The low power consumption in normal operation make theseDACs AD5301/AD5311/AD5321 ideally suited to portable battery-operated equipment.The power consumption is 0.75 mW at 5 V, 0.36 mW at 3 Vreducing to 1 mW in all power-down modes.