Product News: Communication Systems & Equipment

PLL Synthesizer IC incorporates on-chip VCO.

Press Release Summary:

Jun 06, 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.

Original Press Release

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

Press release date: Jun 01, 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.

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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.

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Colleen Cronin, 781-937-1622