ADI AD5666BRUZ-2

The AD5666 is a low power, quad, 16-bit, buffered voltage-output DAC. The part operates from a single 2.7V to 5.5V supply and is guaranteed monotonic by design. The AD5666 has an on-chip reference with an internal gain of 2. The AD5666-1 has a 1.25V 5ppm/°C reference, giving a full-scale output of 2.5V; the AD5666-2 has a 2.5V 5ppm/°C reference, giving a full-scale output of 5V. The on-board reference is off at power-up, allowing the use of an external reference. The internal reference is turned on by writing to the DAC. The part incorporates a power-on reset circuit that ensures that the DAC output powers up to 0V (POR pin low) or to midscale (POR pin high) and remains powered up at this level until a valid write takes place. The part contains a power-down feature that reduces the current consumption of the device to 400nA at 5V and provides software-selectable output loads while in power-down mode for any or all DAC channels. The outputs of all DACs can be updated simultaneously using the LDAC function, with the added functionality of user-selectable DAC channels to simultaneously update. There is also an asynchronous CLR that clears all DACs to a software-selectable code - 0V, midscale, or full scale. The AD5666 utilizes a versatile 3-wire serial interface that operates at clock rates of up to 50 MHz and is compatible with standard SPI, QSPI, MICROWIRE, and DSP interface standards. The on-chip precision output amplifier enables rail-to-rail output swing.

• Low power quad 16-bit DAC
• 14-lead TSSOP
• On-chip 1.25 V/2.5 V, 5 ppm/°C reference
• Power down to 400 nA @ 5 V, 200 nA @ 3 V
• 2.7 V to 5.5 V power supply
• Guaranteed monotonic by design
• Power-on reset to zero scale or midscale
• 3 power-down functions
• Hardware LDAC with LDAC override function
• CLR function to programmable code
• SDO daisy-chaining option
• Rail-to-rail operation

• PROCESS control
• Data acquisition systems
• Portable battery-powered instruments
• Digital gain and offset adjustment
• Programmable voltage and current sources
• Programmable attenuators