5 V 18-Bit DAC in a SOT-23

The AD5680, a member of the nanoDAC family, is a single, 18-bit buffered voltage-out digital-to-analog converter (DAC) that operates from a single 4.5 V to 5.5 V supply and is 18-bit monotonic.

The AD5680 requires an external reference voltage to set the output range of the DAC. The part incorporates a power-on reset circuit that ensures the DAC output powers up to 0 V (AD5680-1) or to midscale (AD5680-2) and remains there until a valid write takes place.

The low power consumption of this part in normal operation makes it ideally suited to portable battery-operated equipment. The power consumption is 1.6 mW at 5 V.

The AD5680 on-chip precision output amplifier allows rail-to-rail output swing to be achieved. For remote sensing applications, the output amplifier’s inverting input is available to the user.

The AD5680 uses a versatile 3-wire serial interface that operates at clock rates up to 30 MHz, and is compatible with standard SPI®, QSPI™, MICROWIRE™, and DSP interface standards.

Applications

* Closed-loop process control

* Low bandwidth data acquisition systems

* Portable battery-powered instruments

* Gain and offset adjustment

* Precision setpoint control

* Single 18-bit nanoDAC

* 18-bit monotonic

* 12-bit accuracy guaranteed

* Tiny 8-lead SOT-23 package

* Power-on reset to zero scale/midscale

* 4.5 V to 5.5 V power supply

* Serial interface

* Rail-to-rail operation

* SYNC interrupt facility

* Temperature range: −40°C to +105°C