Features and Benefits
- 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
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 full-scale 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 0 V 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 user-selectable DAC channels to simultaneously update. There is also an asynchronous CLR that clears all DACs to a software-selectable 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 rail-to-rail output swing.
- Octal DAC (four 12-bit DACs and four 16-bit DACs).
- On-chip 1.25 V/2.5 V, 5 ppm/°C reference.
- Available in 14-lead/16-lead TSSOP.
- Power-on reset to 0 V.
- Power-down capability. When powered down, the DAC typically consumes 200 nA at 3 V and 400 nA at 5 V
- Process control
- Data acquisition systems
- Portable battery-powered instruments
- Digital gain and offset adjustment
- Programmable voltage current sources
- Programmable attenuators
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
The AD5678 evaluation board is designed to help users quickly prototype new AD5678 circuits and reduce design time. The AD5678 operates from a single 2.7 V to 5.5 V supply.
For full data, see the AD5678 data sheet, which must be consulted in conjunction with UG-987 when using the evaluation board.
The evaluation board interfaces to the USB port of a PC via the SDP-B board. Software is available for download to allow the user to program the AD5678.
Documentation & Resources
Tools & Simulations
Precision DAC Error Budget Tool
The Precision DAC Error Budget Tool is a web application that calculates the DC Accuracy of precision DAC signal chains. It shows how the static errors accumulate throughout your signal chain to quickly evaluate the design tradeoffs. Calculations include the DC errors introduced by Voltage References, Operation Amplifiers and Precision DACs.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|AD5678ARUZ-2||Material Declaration||Reliability Data||16-Lead TSSOP|
|AD5678ARUZ-2REEL7||Material Declaration||Reliability Data||16-Lead TSSOP|
|AD5678BRUZ-1||Material Declaration||Reliability Data||14-Lead TSSOP|
|AD5678BRUZ-1REEL7||Material Declaration||Reliability Data||14-Lead TSSOP|
|Wafer Fabrication Data|
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Sample & Buy
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Buy Now Pricing
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.