Microwave PLL synthesiser eliminates frequency-doubling in broadband applications
October 12, 2011 // Paul Buckley
Analog Devices, Inc., has introduced a PLL (phase-locked loop) frequency synthesiser that can be used to implement local oscillators as high as 18 GHz in the up-conversion and down-conversion sections of wireless receivers and transmitters.
The high bandwidth of the ADF41020 allows designers to potentially eliminate a frequency-doubler stage, which simplifies system architecture and reduces cost in applications including microwave point-to-point and multi-point radios, wireless infrastructure equipment, VSAT (very small aperture terminal) radios, semiconductor test equipment, radar applications and private mobile radios.
With an operating bandwidth up to 18 GHz, this is claimed to represent the highest frequency PLL available on the market today.
The ADF41020 PLL frequency synthesiser consists of a low-noise, digital phase-frequency detector, a precision charge pump, a programmable reference divider and high-frequency programmable feedback dividers. A complete synthesiser can be implemented if the PLL is used with an external loop filter and VCO (voltage controlled oscillator). The PLL can be used to drive external microwave VCOs via an active loop filter. The pin-out matches very closely the pinout of the ADF4106/7/8 family of integer-N PLLs, meaning only a minor layout change is required when updating a design to take advantage of the much wider bandwidth.
The ADF41020 PLL frequency synthesiser is software compatible with the existing ADF4106 , ADF4107 and ADF4108 PLLs and is well-suited for use with a variety of products including the ADP150 LDO (low dropout regulator) and the OP184 operational amplifier.
Availability and Pricing
Samples of the ADF41020 PLL frequency synthesizer packaged in 20-lead LFCSP are available now and priced $12.77 each in 1,000-unit quantities.
More information about the ADF41020 PLL frequency synthesizer at
u-blox and Cohda Wireless partner on V2X
October 06, 2015
To meet rapidly increasing demand for V2X modules for trials, early deployments and infrastructure roll-out, Cohda Wireless ...
Elon Musk targets high-volume solar panel dominance
Volvo shows user interface for self-driving cars
Volkswagen has given engineering a black eye
MEMS platforms are way to go, says Bosch's Finkbeiner
Put FPGAs in your SoCs
October 05, 2015
Flex Logix Technologies Inc. has created a new species of product. The Mountain View, Calif. company has added field-programmable ...
Daimler tests self-driving truck on public highway
Silicon Labs prevails in Cresta patent dispute
Machine learning for every app
- Determine Balancing Current for the LTC3305 Lead-Acid Battery Balancer
- 3 Ways to Simplify Medical Device Testing
- Thread Networking Protocol Simplifies Connecting “Things” in the Home and Beyond
- High Voltage CMOS Amplifier Enables High Impedance Sensing with a Single IC
InterviewMEMS platforms are way to go, says Bosch's Finkbeiner
In the two years since we last interviewed Stefan Finkbeiner, CEO of Bosch Sensortec, the company has taken over from STMicroelectronics as the leading global supplier of MEMS components. Here he explains ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, LabNation is giving away three of its SmartScope open source USB oscilloscopes, worth 229 Euros each, for EETimes Europe's readers to win.
Successfully funded through Kickstarter last year, the SmartScope is claimed to be the world's first test equipment designed to run on multiple operating systems and platforms such as smartphones, tablets and PCs. It is powered directly from... MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.