Unlike conventional solutions that implement the analog functions on separate devices or include the data converters on the ASIC, the AD9352 and AD9353 RF transceivers utilize "smart-partitioning," a concept pioneered by ADI, to integrate all the analog signal processing technology--analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and RF functions--on a single chip. This allows the digital baseband chips to be manufactured on more cost-effective fine line processes, such as 90 nm or 65 nm. The transceivers feature a direct connection to the digital modem via the ADI/Q(TM) digital I/Q interface, a simple parallel CMOS digital I/O interface that has been adopted by multiple digital modem partners.
" ADI is the first company to introduce RF CMOS direct conversion WiMAX transceivers that combine high integration with high performance, and offer the ADI/Q digital I/Q interface for a seamless connection to the digital baseband," said Bernard Aboussouan, VP, marketing and business development for Sequans Communications, a leading supplier of fixed and mobile WiMAX silicon and software. "We chose to partner with ADI and implement the ADI/Q digital interface on our SQN1110 802.16e compliant digital baseband. We are confident that ADI's WiMAX transceivers combined with our digital baseband will offer a solution that meets the price, performance and time-to-market requirements of WiMAX terminal manufacturers."
"WiMAX continues to gain industry support, with recent commitments by worldwide and North American carriers to build-out a nationwide WiMAX network," said Dave Robertson, product line director, High Speed Signal Processing Group, Analog Devices. "By introducing products like the AD9352 and AD9353 transceivers, Analog Devices is helping to facilitate the mass deployment of WiMAX and reduce the barriers to cost and performance."
Highly-Integrated RF Transceivers
The AD9352 and AD9353 are fully-integrated, direct conversion transceivers for WiMAX (IEEE 802.16) wireless network systems that offer a complete RF and mixed-signal system on a chip. The dual-band AD9352 operates in the 2.3 to 2.7 GHz and 4.9 to 5.9 GHz ranges and the single-band AD9353 operates in the 3.3 to 3.8 GHz range. Together, the transceivers cover most licensed and unlicensed bands worldwide.
Integrated on the transceivers are 12-bit, 160 mega-samples-per-second (MSPS) ADCs and DACs, along with smart system features such as self-calibration, automatic gain control, transmit power control, support for automatic frequency control, and auxiliary ADCs and DACs for system monitoring. The on-board converters and smart system features reduce the required level of real time signal processing between modem and the transceiver, thus dramatically simplifying RF driver development and support. The transceivers also integrate a high sensitivity direct-conversion CMOS receiver, and channel-select filtering at baseband. A low phase noise LO path is achieved by integrating a fractional-N synthesizer. To reduce system cost, an on-chip crystal oscillator replaces the expensive voltage controlled temperature compensated crystal oscillator (VCTCXO).
Superior RF Performance
The devices offer excellent noise figure of 3.5 dB along with adjacent channel and alternate channel rejection capability that is 8 dB higher than the 802.16 standard requires. The devices' highly linear transmit path has excellent spectral purity and offers error vector magnitude (EVM) of -37 dB at 0 dBm output power. The transmit power is detected by an accurate power detector and autonomously controlled with a range of 60 dB with step increments of 0.25 dB.
Availability and Pricing
The AD9352 and AD9353 are sampling now with full production scheduled for December 2006. The transceivers, priced starting at $14.95 per unit in 1,000-piece quantities, are available in 9 mm x 9 mm 64-pin lead free chip scale packages (LFCSP), and are specified over an operating temperature range of -40 degrees C to +85 degrees C. An evaluation board is available. For more information, visit http://www.analog.com/pr/wimaxtransceivers.
About Analog Devices
Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the most long-standing, high-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 around the world, representing virtually all types of electronics equipment. Celebrating more than 40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices, Inc. is headquartered in Norwood, Massachusetts, and employs approximately 8,900 people worldwide. It has manufacturing facilities in Massachusetts, California, North Carolina, Ireland, and the Philippines. Analog Devices' common stock is listed on the New York Stock Exchange and ADI is included in the S&P 500 Index.
ADI/Q is a trademark of Analog Devices, Inc. All other trademarks included herein are the property of their respective owners
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