D/A CONVERTER SYNTHESIZES ENTIRE CABLE SPECTRUM INTO A SINGLE RF PORT

Designed for cable head-end equipment manufacturers, the AD9739A 14-bit, 2.5-GSPS D/A converter consumes only 1.1 W of power.
AD9739A

Norwood, MA (02/22/2011) - Analog Devices, Inc. (ADI), a leading manufacturer of semiconductors for signal processing applications and the data converter market share leader*, today introduced a 14-bit D/A converter that enables cable television and broadband operators to synthesize the entire cable spectrum up to 1 GHz into a single RF (radio frequency) port, while consuming a maximum of 1.1 W of power. The AD9739A TxDAC®14-bit, 2.5-GSPS D/A converter's wide bandwidth and dynamic range enables cable operators to increase the QAM (quadrature amplitude modulation) channel densities by 20 times over today's cable modems. Competing D/A converter solutions require an additional 28 LVDS (low-voltage differential signaling) pairs for the data interface and consume nearly three times the power of ADI's AD9739A D/A converter.

"The AD9739A allows cable head-end equipment manufacturers to simplify and reduce their signal chain footprint while enabling operators to continue providing their customers with improved next-generation services, such as interactive TV, high-definition broadcasts and new specialty channels," said Chris Jacobs, product line director, High-speed D/A Converters, Analog Devices. "Synthesizing the entire cable spectrum into a single RF port increases the number of QAM channels per D/A converter by up to 20 times to meet cable infrastructure demands while significantly lowering power consumption and system cost."

AD9739A D/A Converter: Multi-Standard Support for Cable and Wireless Infrastructure

The AD9739A D/A converter features ADI's proprietary mix-mode function, which supports the high-fidelity digital synthesis of RF signals at up to 3.6 GHz. The combination of best-in-class, 2.5-GSPS bandwidth and 14-bit dynamic range with a direct-to-RF core allows broadband and next-generation wireless equipment designers to use a single-transmit D/A converter architecture that eliminates a low-pass filter and one mixer or modulator stage.

The AD9739A also takes advantage of a patented D/A converter core that is well suited for a broad range of applications including wireless-communications equipment, instrumentation and defense electronics. The device provides multi-carrier capability up to the Nyquist frequency in baseband mode and uses the mix-mode function to generate RF signals in the second and third Nyquist zones.

AD9739A 14-bit, 2.5GSPS RF D/A Converter Features and Benefits:

  • Operates from 1.8V and 3.3V supplies for a total maximum power consumption of 1.1 W.
  • Low noise and intermodulation distortion performance enable high quality synthesis of wideband signals up to 1 GHz.
  • Dual-port interface with double-data-rate LVDS data receivers supports the maximum conversion rate of 2.5 GSPS.
  • Proprietary switching technique enhances dynamic performance.
  • Output current is programmable from 8.7 mA to 31.7 mA.

Pricing, Availability and Complementary Products

Product Production Release Resolution (Bits) Sample Rate (GSPS) Price Each In 1,000 Quantities Packaging
AD9739A Now 14 2.5 $43.69 160-ball CSBGA

Complementary components include ADI's high-speed, low-jitter clock generation and distribution products, such as the ADCLK914 high-speed SiGe clock buffer. This product drives the clock input to the AD9739A with a 2-V differential swing that achieves jitter performance of 110 fs (femto seconds).

Data Converters: Bridging the Analog and Digital Worlds

More designers turn to Analog Devices than any other supplier for the high-performance conversion technology required to bridge the analog and digital worlds in today's myriad electronic systems. With the industry's leading portfolio of A/D Converters (analog-to-digital converters) and D/A Converters (digital-to-analog converters), Analog Devices' converter products feature the right combination of sampling rates, accuracy, and reduced noise, power, price, and package size required in industrial and instrumentation, medical equipment, automotive systems, communications infrastructure, and consumer electronics. Online evaluation tools help customers quickly validate, select, and design in the optimal data converters to reduce design complexity, development schedules, and bill-of-material costs. To view ADI's A/D converter selection guide, visit www.analog.com/ADCsearch. For A/D converters drivers, visit www.analog.com/ADCdrivers. To view ADI's D/A converters selection guide, visit www.analog.com/DACsearch.

About Analog Devices

Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices is included in the S&P 500 Index.

*Analog Devices, Inc. leads the worldwide data converter market with a 46 percent share, according to industry analyst firm Databeans, Inc. in its market research report titled "2010 Data Converters." Analog Devices' 46 percent share is larger than the combined market share of the nearest eight competitors.

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TxDAC is a registered trademark of Analog Devices, Inc.

Editor's Contact Information:

Bob Olson
781-937-1666

bob.olson@analog.com

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