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PLL Synthesizer IC incorporates on-chip VCO.

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June 6, 2011 - Supporting dual output ports, Model ADF4351 allows implementation of fractional-N or integer-N operation continuously over frequency range of 35-4,400 MHz. Device features rms jitter of 0.3 ps and typical EVM of 0.4% at 2.1 GHz. For applications that require isolation, RF output stage can be muted. Housed in 32-lead LFCSP package, synthesizer operates from 3.0-3.6 V and can be powered down when not in use. Unit includes analog and digital lock detect and switched bandwidth fast-lock mode.

New PLL Synthesizer Facilitates Integration, Flexibility, Performance and Continuous Frequency Range Support

(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)

Analog Devices, Inc.
1 Technology Way, P.O. Box 9106
Norwood, MA, 02062-9106

Press release date: June 1, 2011

NORWOOD, Mass - Analog Devices, Inc. (ADI), a global leader in high-performance signal processing technology and leading provider of RF ICs, today introduced a PLL (phase-locked loop) synthesizer for wireless communication systems that features the industry's best combination of integration, performance, flexibility and the widest continuous frequency-range coverage for a single RF device. The latest member of ADI's RF IC product portfolio, the ADF4351 PLL allows implementation of fractional-N or integer-N operation continuously over an ultra-wide frequency range of 35 MHz to 4400 MHz while maintaining excellent phase-noise performance. This has the benefit of allowing customers to greatly reduce the need to support multiple narrowband synthesizers, thereby reducing inventory and bill of materials costs. The ADF4351 incorporates a high-performance, on-chip VCO (voltage-controlled oscillator) and supports dual output ports, which allows the part to have unsurpassed flexibility and performance in a small surface-mount package.

o Download data sheet, order samples, or evaluation boards:
o Evaluate designs with the newly released ADIsimPLL(TM) development tool, Version 3.4, a powerful tool that enables the rapid and reliable evaluation of new high-performance PLL products from ADI:

The ADF4351 PLL features programmable divide-by-1/2/4/8/16/32/64 circuits, which allow the user to generate an RF output frequency anywhere between 35 MHz and 4400 MHz. This means that engineers no longer have to design multiple synthesizers for different bands, which speeds design cycle times and reduces component costs. For applications that require isolation, the RF output stage can be muted. The mute function is both pin- and software-controllable. Furthermore, control of all of the on-chip registers is through a simple 3-wire interface. The ADF4351 PLL operates with a power supply ranging from 3.0 V to 3.6 V and can be powered down when not in use.

ADF4351 PLL with Integrated VCO; Key Features:
o Leading RF performance: rms jitter of 0.3 ps typ; typical EVM of 0.4% at 2.1 GHz
o Ultimate Flexibility: programmable dual-modulus prescaler of 4/5 or 8/9; programmable output power level, dual output ports, integer-N or fractional-N operation
o Analog and digital lock detect
o Switched bandwidth fast-lock mode
o Cycle slip reduction

Pricing, Availability and Complementary Products

Product           Price Each in          Availability        Package                1,000-unit Quantities          ADF4351               $11.13             Sampling now;                                        volume production   32-lead LFCSP                                           in the fall
The ADF4351 PLL can be incorporated readily into circuits for wireless communications applications and is well-suited to operate with other ADI RF ICs, including the ADL5801 RF mixer, ADL5375 modulator and ADL5382 demodulator.

RF IC Portfolio Covers Entire RF Signal Chain
Using a unique combination of design skills, system understanding and process technologies, Analog Devices offers the broadest portfolio of RF products covering the entire RF signal chain from industry-leading high-performance discrete RF function blocks to highly-integrated multi-functional single-chip RF solutions. These products are also supported by a wide range of free design tools, evaluation boards and other design resources to ease the development of RF systems. For more information, visit:

About Analog Devices
Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest 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, representing virtually all types of electronic equipment. Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices' common stock is listed on the New York Stock Exchange under the ticker "ADI" and is included in the S&P 500 Index.

Follow ADI on Twitter at
Subscribe to Analog Dialogue, ADI's monthly technical journal, at:

Analog Devices, Inc.
Colleen Cronin, 781-937-1622
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