Product category:
Frequency Control Components
News Release from: Analog Devices | Subject: AD9913
Edited by the Electronicstalk Editorial
Team on 13 December 2007
Direct digital synthesiser is made for
handhelds
The AD9913 is the first DDS device to deliver a 250MHz clock rate while consuming as little as 50mW of power.
Analog Devices is expanding the applicability of its industry leading direct digital synthesis technology into battery-powered industrial, communications and defence electronics applications with the introduction of a complete low-power, low-cost direct digital synthesiser (DDS) specifically designed for wireless, handheld equipment Unlike competing approaches used to synthesise a digitally controlled frequency, the AD9913 is the first DDS device to deliver a 250MHz clock rate while consuming as little as 50mW of power
This article was originally published on Electronicstalk on 2 Jul 2008 at 8.00am (UK)
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At less than US $5 in volume quantities and available in a compact chip-scale package, the new IC is ideally suited for portable barcode scanners, radar detectors, remote radio controls and other products that require a cost-effective combination of performance and low-power operation.
Unlike phase-locked loop (PLL) devices, which suffer from settling times measured in microseconds and fine-tuning limitations, the AD9913 settles in nanoseconds with granularity well below 10mHz.
Other approaches, including field-programmable gate arrays (FPGAs) with embedded DDS functions, have difficulty matching the AD9913's greater than 80dB spurious-free dynamic range (SFDR) performance on a 100MHz output signal while requiring higher operating power and the addition of a discrete digital-to-analogue convertor (DAC) to synthesise the sinewave.
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The ADF9010 integrates a high-performance transmitter quadrature modulator with an integer-N synthesiser and on-chip low-phase-noise voltage-controlled oscillator.
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The AD9913 includes an on-chip 10bit high-speed DAC with no price premium compared with a stand-alone DAC.
The fine-tuning granularity and higher SFDR of the AD9913 allow it to more quickly and accurately generate a stable signal in the band of interest.
In a remote radio-controlled application, for example, such as an unmanned aircraft, this means the operator is less likely to lose contact with the airplane due to frequency interference that can result in a dropped signal.
"Larger systems like wireless basestations and test and measurement equipment have been taking advantage of the higher operating-frequency ranges, faster linear frequency hopping and other performance benefits of DDS technology for the better part of a decade", says Kevin Kattmann, product line director of High-Speed Signal Processing, Analog Devices.
"With the launch of the AD9913, designers of battery-powered devices can now incorporate the same faster switching speeds, fine frequency resolutions and broader frequency spectrum into their products with no price or power penalty".
The AD9913 is available in full production quantities.
The AD9913 costs US $4.65 per unit in 100,000-unit quantities and is available in a 32-lead LFCSP (lead-frame chip-scale package).
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