Print  |  Send  |   

Microwave PLL synthesiser eliminates frequency-doubling in broadband applications

October 12, 2011 // Paul Buckley

Microwave PLL synthesiser eliminates frequency-doubling in broadband applications

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
www.analog.com/adf41020

All news

RF & Microwave

Follow us

Fast, Accurate & Relevant for Design Engineers only!

Technical papers     

Filter Wizard     

Check out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.

Linear video channel

READER OFFER

Read more

This month, Arrow Electronics is giving away ten XMC1200 lighting application kits, worth 100 Euros each, for EETimes Europe's readers to win.

Each kit combines Infineon’s brightness and colour control XMC1200 CPU board to drive flicker free LED dimming and colour changing, together with a colour LED card and a white LED card.

Read more

Design centers     

Automotive
Infotainment Making HDTV in the car reliable and secure

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.

 

You must be logged in to view this page

Login here :