ADI AD5678BRUZ-1

The AD5678 is a low power, octal, buffered voltage-output DAC with four 12-bit DACs and four 16-bit DACs in a single package. All devices operate from a single 2.7 V to 5.5 V supply and are guaranteed monotonic by design. The AD5678 has an on-chip reference with an internal gain of 2. The AD5678-1 has a 1.25 V 5 ppm/°C reference, giving a fullscale output of 2.5 V; the AD5678-2 has a 2.5 V 5 ppm/°C reference, giving a full-scale output of 5 V. The on-board reference is off at power-up, allowing the use of an external reference. The internal reference is enabled via a software write. The part incorporates a power-on reset circuit that ensures that the DAC output powers up to 0V 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 400 nA at 5 V 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 userselectable DAC channels to simultaneously update. There is also an asynchronous CLR that clears all DACs to a softwareselectable code— 0 V, midscale, or full scale. The AD5678 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 railto-rail output swing.

• Low power octal DAC with Four 16-bit DACs Four 12-bit DACs
• 14-lead/16-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
• 3 power-down functions
• Hardware LDAC and LDAC override function
• CLR function to programmable code
• Rail-to-rail operation

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