Analog Devices Inc. ADF41513 PLL Synthesizer

Analog Devices ADF41513 PLL Synthesizer is an ultra-low-noise frequency synthesizer that can be used to implement Local Oscillators (LOs) as high as 26.5GHz in the upconversion and downconversion sections of wireless receivers and transmitters. When used with an external loop filter and Voltage Controlled Oscillator (VCO), the ADF41513 can implement a completed Phase-Locked Loop. The wide 1GHz to 26.5GHz bandwidth of the ADF41513 eliminates the need for a frequency doubler or divider stage, simplifying system architecture and reducing cost.

The ADF41513 is designed on a high performance silicon geranium (SiGe), bipolar complementary metal-oxide semiconductor (BiCMOS) process, achieving a normalized phase noise floor of -235dBc/Hz. The phase frequency detector (PFD) operates up to 250MHz (integer-N mode)/125MHz (fractional-N mode) for improved phase noise and spur performance. The variable modulus, ∑-Δ modulator allows extremely fine resolution when using a 49-bit divide value. The ADF41513 can be used as an integer-N PLL, or it can be used as a fractional-N PLL with either a fixed modulus for subhertz frequency resolution or variable modulus for subhertz exact frequency resolution.

The ADF41513 PLL Synthesizer is offered in a compact, 24-lead, 4mm × 4mm Leadframe Chip Scale Package (LFCSP), ideal for space constrained applications.


  • 1GHz to 26.5GHz bandwidth
  • Ultra low noise PLL
    • Integer-N = -235dBc/Hz
    • Fractional-N = -231dBc/Hz
  • High maximum PFD frequency
    • Integer-N = 250MHz
    • Fractional-N = 125MHz
  • 25-bit fixed/49-bit variable fractional modulus mode
  • Single-ended reference input
  • 3.3V power supply, 3.3V charge pump
  • Integrated 1.8V logic capability
  • Phase resync
  • 16× range Programmable charge pump currents
  • Digital lock detect
  • 3-wire serial interface with register readback option
  • Hardware and software power-down mode
  • -40°C to +105°C Operating temperature range
  • LFCSP-24 Package type
  • 4mm x 4mm Package dimensions
  • RoHS compliant


  • Test equipment and instrumentation
  • Wireless infrastructure
  • Microwave point to point and multipoint radios
  • Very Small Aperture Terminal (VSAT) radios
  • Aerospace and defense

Block Diagram

Block Diagram - Analog Devices Inc. ADF41513 PLL Synthesizer

Package Diagram

Mechanical Drawing - Analog Devices Inc. ADF41513 PLL Synthesizer
Publicado: 2019-03-12 | Actualizado: 2023-08-14