1. Products
  2. RF and Microwave
  3. Phase Locked Loop (PLL) Synthesizer & Translation Loop
  4. Fractional-N PLL
  5. ADF4372


Features and Benefits

  • RF output frequency range: 62.5 MHz to 16,000 MHz
  • Fractional-N synthesizer and integer-N synthesizer
  • High resolution 39-bit fractional modulus
  • Typical spurious fPFD: −90 dBc
  • Integrated rms jitter: 38 fs (1 kHz to 100 MHz)
  • Normalized phase noise floor: −234 dBc/Hz
  • fPFD operation to 250 MHz
  • Reference input frequency operation to 600 MHz
  • Programmable divide by 1, 2, 4, 8, 16, 32, or 64 output
  • 62.5 MHz to 8,000 MHz output at RF8x and RFAUX8x
  • 8,000 MHz to 16,000 MHz output at RF16x
  • Lock time approximately 3 ms with automatic calibration
  • Lock time <30 μs with autocalibration bypassed, typical
  • Analog and digital power supplies: 3.3 V typical
  • VCO supply voltage: 3.3 V and 5 V
  • RF output mute function
  • 7mm × 7mm, 48-terminal LGA package

Product Details

The ADF4372 allows implementation of fractional-N or integer-N phase-locked loop (PLL) frequency synthesizers when used with an external loop filter and an external reference frequency. The wideband microwave voltage controlled oscillator (VCO) design allows frequencies from 62.5 MHz to 16 GHz to be generated.

The ADF4372 has an integrated VCO with a fundamental output frequency ranging from 4000 MHz to 8000 MHz. In addition, the VCO frequency is connected to a divide by 1, 2, 4, 8, 16, 32, or 64 circuit that allows the user to generate radio frequency (RF) output frequencies as low as 62.5 MHz at RF8x. A frequency multiplier at RF16x generates from 8 GHz to 16 GHz. RFAUX8x duplicates the frequency range of RF8x or permits direct access to the VCO output. To suppress the unwanted products of frequency multiplication, a harmonic filter exists between the multiplier and the output stage of RF16x.

Control of all on-chip registers is through a 3-wire interface. The ADF4372 operates with analog and digital power supplies ranging from 3.15 V to 3.45 V, and 5 V for the VCO power supply. The ADF4372 also contains hardware and software power-down modes.


  • Wireless infrastructure (multicarrier global system for mobile communication (MC-GSM), 5 G)
  • Test equipment and instrumentation
  • Clock generation
  • Aerospace and defense

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (2)

Documentation & Resources

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  • 3rd Party Solutions (1)
  • Data Sheets (1)
  • Application Notes (1)
  • User Guides (1)
  • Webcasts (2)
  • Product Selection Guide (1)
  • Solutions Bulletins & Brochures (1)
  • Design Notes (1)
  • Technical Articles (4)
  • Tools & Simulations

    IBIS Models

    Reference Designs (1)

    Product Recommendations

    ADF4372 Companion Parts

    Recommended Reference Buffer

    • With integrated filters for improved noise: LTC6957.

    Design Resources

    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.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    ADF4372BCCZ Material Declaration Reliability Data 48-Terminal Land Grid Array [LGA]
    ADF4372BCCZ-RL7 Material Declaration Reliability Data 48-Terminal Land Grid Array [LGA]
    Wafer Fabrication Data

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