Alternative Parts
Overview
Features and Benefits
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Product Details
The AD9776/AD9778/AD9779 are dual, 12-/14-/16-bit, high dynamic range, digital-to-analog converters (DACs) that provide a sample rate of 1 GSPS, permitting multicarrier generation up to the Nyquist frequency. They include features optimized for direct conversion transmit applications, including complex digital modulation, and gain and offset compensation. The DAC outputs are optimized to interface seamlessly with analog quad-rature modulators such as the AD8349. A serial peripheral interface (SPI®) provides for programming/readback of many internal parameters. Full-scale output current can be programmed over a range of 10 mA to 30 mA. The devices are manufactured on an advanced 0.18 μm CMOS process and operate on 1.8 V and 3.3 V supplies for a total power consumption of 1.0 W. They are enclosed in 100-lead TQFP packages.
Product Highlights
- Ultralow noise and intermodulation distortion (IMD) enable high quality synthesis of wideband signals from baseband to high intermediate frequencies.
- A proprietary DAC output switching technique enhances dynamic performance.
- The current outputs are easily configured for various single-ended or differential circuit topologies.
- CMOS data input interface with adjustable set up and hold.
- Novel 2×, 4×, and 8× interpolator/coarse complex modulator allows carrier placement anywhere in DAC bandwidth.
Applications
WCDMA, CDMA2000, TD-SCDMA, WiMax, GSM
Data Sheet, Rev. A, 3/07
Product Categories
Markets and Technologies
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)
Documentation & Resources
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AN-1414: Interfacing the ADL5371 I/Q Modulator to the AD9779A Dual-Channel, 1 GSPS, High Speed DAC (Rev. B)8/9/2016PDF147K
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AN-748: Set-Up and Hold Measurements in High Speed CMOS Input DACs (Rev. 0)2/14/2015PDF812 kB
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AN-0996: The Advantages of Using a Quadrature Digital Upconverter (QDUC) in Point-to-Point Microwave Transmit Systems (Rev. 0)3/25/2009PDF219 kB
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AN-808: Multicarrier CDMA2000 Feasibility (Rev. 0)11/9/2007PDF1535 kB
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AN-912: Driving a Center-Tapped Transformer with a Balanced Current-Output DAC (Rev. 0)5/21/2007PDF246 kB
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AN-822: Synchronization of Multiple AD9779 TxDACs (Rev. A)11/29/2006PDF129 kB
Tools & Simulations
IBIS Models
Design Resources
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.
PCN-PDN Information
Sample & Buy
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Evaluation Boards
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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.