AD5302

The AD5302/AD5312/AD5322 are dual 8-, 10- and 12-bit bufferedvoltage output DACs in a 10-lead mSOIC package thatoperate from a single +2.5 V to +5.5 V supply consuming230 mA at 3 V. Their on-chip output amplifiers allow the outputsto swing rail-to-rail with a slew rate of 0.7 V/ms.heAD5302/AD5312/AD5322 utilize a versatile 3-wire serial interface whichoperates at clock rates up to 30 MHz and is compatible withstandard SPI™, QSPI™, MICROWIRE™ and DSP interfacestandards.

The references for the two DACs AD5302 are derived from two referencepins (one per DAC). The reference inputs may be configured asbuffered or unbuffered inputs. The outputs of both DACs maybe updated simultaneously using the asynchronous LDAC input.Theparts incorporate a power-on-reset circuit that ensuresthat the DAC outputs power-up to 0 V and remain there until avalid write takesplace to the device. The parts contain a powerdownfeature that reduces the current consumption of thedevices to 200 nA at 5 V (50 nA at 3 V) and provides softwareselectableoutput loads while in power-down mode.

The low power consumption of these parts AD5302 in normal operationmake them ideally suited to portable battery operated equipment.The power consumption is 1.5 mW at 5 V, 0.7 mW at3 V, reducing to 1 mW in power-down mode.