AD5320*

Single 12-Bit DAC6-Lead SOT-23 and 8-Lead SOIC PackagesMicropower Operation: 140A @ 5 VPower-Down to 200 nA @ 5 V, 50 nA @ 3 V+2.7 V to +5.5 V Power SupplyGuaranteed Monotonic by DesignReference Derived from Power SupplyPower-On-Reset to Zero VoltsThree Power-Down FunctionsLow Power Serial Interface with Schmitt-TriggeredInputsOn-Chip Output Buffer Amplifier, Rail-to-Rail OperationSYNC Interrupt Facility

The AD5320 is a single, 12-bit buffered voltage out DAC thatoperates from a single +2.7 V to +5.5 V supply consuming115 A at 3 V. Its on-chip precision output amplifier allowsrail-to-rail output swing to be achieved. The AD5320 utilizes aversatile three-wire serial interface that operates at clock rates upto 30 MHz and is compatible with standard SPI™, QSPI™,MICROWIRE™ and DSP interface standards.

The reference for AD5320 is derived from the power supplyinputs and thus gives the widest dynamic output range. The partincorporates a power-on-reset circuit that ensures that the DACoutput powers up to zero volts and remains there until a validwrite takes place to the device. The part contains a power-downfeature that reduces the current consumption of the device to200 nA at 5 V and provides software selectable output loadswhile in power-down mode. The part is put into power-downmode over the serial interface.

The low power consumption of this part AD5320 in normal operationmakes it ideally suited to portable battery operated equipment.The power consumption is 0.7 mW at 5 V reducing to 1 W inpower-down mode.

The AD5320 is one of a family of pin-compatible DACs. TheAD5300 is the 8-bit version and the AD5310 is the 10-bitversion. The AD5300/AD5310/AD5320 are available in 6-leadSOT-23 packages and 8-lead SOIC packages.