Product category:
Communications ICs (Wireless)
News Release from: Analog Devices | Subject: AD9354 and AD9355
Edited by the Electronicstalk Editorial
Team on 27 September 2007
Transceivers integrate full WiMAX
feature set
The power and space savings of the AD9354 and AD9355 enable manufacturers to incorporate WIMAX functionality into handsets, thumb drives or PCMCIA cards.
Analog Devices has introduced RF-to-digital baseband transceivers designed to enable the IEEE802.16d/e mobile WiMAX standard for mobile communications devices, such as cellphones, personal digital assistants (PDAs) and handheld multimedia devices WiMAX terminals enable wireless broadband connectivity with dramatically lower installation costs than competitive wired solutions
This article was originally published on Electronicstalk on 14 Sep 2001 at 8.00am (UK)
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As WiMAX evolves from a fixed-line protocol to one that increasingly serves portable communications applications, device makers are requiring smaller, more energy-efficient solutions that meet the cost, space and power budgets of mobile communications terminals.
Building on ADI's AD9352 and AD9353 family of integrated WiMAX transceivers introduced in 2006, the AD9354 and AD9355 consume less power than other transceivers in their class and are available in a 20% smaller package, while adding an additional receiver path for multiple-input multiple-output (MIMO) support.
The power and space savings of the AD9354 and AD9355 enable manufacturers to incorporate WIMAX functionality into handsets, thumb drives or PCMCIA cards.
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By integrating ADCs, DACs and real-time control and calibration loops, the transceivers enable designers to eliminate all analogue and RF functionality from their baseband processors.
With separate digital and analogue blocks, the communications and applications processors can be manufactured in the most cost-effective digital CMOS process technologies, reducing power, package size and system design complexity.
"As a high bandwidth technology capable of reaching across several kilometres, WiMAX is proving to be an ideal communications medium for mobile devices", says J Pierre Lamoureux, Vice President and Chief Technology Officer for Wavesat, a leading fabless semiconductor developer of WiMAX baseband chips and development tools.
"Analog Devices recognised this potential early on".
"ADI's design efforts and 'smart partitioning' of the analogue and digital blocks have yielded transceivers with the sensitivity and linearity that helps companies like Wavesat accelerate mobile WiMAX deployment".
The AD9354 and AD9355 transceivers integrate two direct-conversion receivers that provide support for MIMO technology, which ensures mobile devices achieve uninterrupted WiMAX service.
The direct-conversion transmitter architecture achieves state-of-the-art error vector magnitude (EVM), maximising network throughput.
The transceivers communicate with a WiMAX terminal's baseband ASIC or FPGA using the industry standard JESD207 digital interface that Analog Devices helped to define.
The databus requires 13 pins, which is comparable to competitive products employing analogue interfaces.
"By including on-chip data conversion and adding a second receiver signal chain to our transceiver architecture, Analog Devices is helping communications service providers extend WiMAX into the mobile marketplace", says Thomas Gratzek, Business Director, WiMAX Transceiver Group, Analog Devices.
"The AD9354 and AD9355 cover the key WiMAX frequency bands and are ideally suited for the small form factors in development".
The AD9354 and AD9355 operate in the 2.3-2.7 and the 3.3-3.7GHz ranges and support channel bandwidths of 3.5, 4.375, 5, 7, 8.75 and 10MHz.
The devices have an excellent 3.25dB noise figure and best-in-class linearity, both of which enable optimum real-world performance as WiMAX network traffic increases.
The smart partitioning architecture enables autonomous AGC (automatic-gain control), transmit-power control (TPC), and calibration routines that dramatically reduce the RF driver development effort.
Additionally, the highly accurate closed-loop power control enables single-point factory calibration of transmit power.
In contrast, other transceivers require eight to ten calibration points, which increase final test costs and extended development times.
The AD9354 and AD9355 mobile WiMAX transceivers are sampling now.
The devices are priced at US $11.45 per unit in sample volumes.
The AD9354 and AD9355 are housed in 8 x 8mm, 64-lead LFCSPs (lead-frame chip-scale packages).
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