ADF4252

Lowest Phase Noise PLL Synthesizer using Fractional-N Technology
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Product Details

The ADF4252 Fractional-N Synthesizer when combined with a VCO and loop filter forms a complete phased locked loop (PLL). This solution from ADI creates state-of-the-art LO's (local oscillator) for the upconversion and downconversion of RF signals in Wireless applications. The ADF4252 can provide the LO for both RF and IF sections. The RF section incorporates Fractional-N techniques while the IF section uses integer-N techniques. The ADF4252 PLL consists of a low noise digital phase frequency detector (PFD), a precision charge pump, a programmable reference divider, programmable integer registers. Programmable modulus fractional interpolator.

-103dBc/Hz In-band Phase Noise performance for GSM 1800MHz conditions (as an example) is approximately a 15dB improvement over the ADI best Integer-N PLL Phase Noise (ADF4106) and a 10dB improvement over competing F-N PLL products available today. Fractionality will provide for higher PFD reference which will allow wider loop bandwidth for fast lock times. This product is targeted principally at Handset and infrastructure applications requiring low phase noise, fast settling, small channel steps at high output frequencies.

Sales Collateral: Full data sheet with performance graphs and evaluation board and software available, featured on ADIsimPLL Synthesizer software simulation tool

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At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

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This page contains ordering information for the evaluation board used to evaluate the ADF4252 Lowest Phase Noise PLL Synthesizer using Fractional-N Technology.

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ADF4252 Companion Parts

Recommended Linear Regulators

  • For a step up, 3V to 5V regulator , we recommend the ADP1613 .
  • For ultralow noise, 3V applications,150 mA output , we recommend the ADP150 .
  • For ultalow noise, 3V applications, 200 mA output , we recommend the ADP151 .
  • For high accuracy, 5V applications , we recommend the ADP3334 .

Recommended Divide-by-4 Prescaler

  • For a low noise, low power, fixed RF block , we recommend the ADF5001 .

Recommended Modulators/Demodulators

  • For broadband quadrature IF/RF signals , we recommend the ADL5375 or the ADL5380 .

Recommended PLL Active Filter

  • For an ultralow noise, rail-to-rail amplifier , we recommend the OP184 .

Recommended RF Mixers

  • For 10 MHz to 6 GHz, high dynamic range active mixers , we recommend the ADL5801 or the ADL5802 .

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.