Low Noise Integer N PLL Frequency Synthesizer With Integrated VCO


Product details


Integrated VCO Yes Output frequency (Min) (MHz) 1595 Output frequency (Max) (MHz) 1711 Normalized PLL phase noise (dBc/Hz) -137 Current consumption (mA) 130 open-in-new Find other RF PLLs & synthesizers

Package | Pins | Size

VQFN (RHA) 40 36 mm² 6 x 6 open-in-new Find other RF PLLs & synthesizers


  • Fully Integrated VCO
  • Low Phase Noise: –137dBc/Hz (at 600kHz, fVCO
    of 1.9GHz)
  • Low Noise Floor: –158dBc/Hz at 10MHz Offset
  • Integer-N PLL
  • Input Reference Frequency range: 10MHz to
  • VCO Frequency Divided by 2-4 Output
  • Output Buffer Enable Pin
  • Programmable Charge Pump Current
  • Hardware and Software Power Down
  • 3-Wire Serial Interface
  • Single Supply: 4.5V to 5.25V Operation
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TRF3761 is a family of high performance, highly integrated frequency synthesizers, optimized for high performance applications. The TRF3761 includes a low-noise, voltage-controlled oscillator (VCO) and an integer-N PLL.

TRF3761 integrates divide-by 1, 2, or 4 options for a more flexible output frequency range. It is controlled through a 3-wire serial-programming-interface (SPI) interface. For power sensitive applications the TRF3761 can be powered down by the SPI interface or externally via chip_en pin 2.

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Technical documentation

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Type Title Date
* Data sheet TRF3761-x Integer-N PLL with Integrated VCO datasheet (Rev. K) Dec. 31, 2015
Application note TRF3761 QFN Installation Using a Hakko Hot Air Rework Station Apr. 07, 2007
Application note Fractional/Integer-N PLL Basics May 13, 1998

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Software development

SLWC102.ZIP (8813 KB)

Design tools & simulation

Loop Filter Calculation Tool
LOOP_FILTER-CALC The Loop Calculator tool calculates component values for PLL loop filter design. The tool calculates component values based on system performance specifications provided by the user.
document-generic User guide
  • Supports integer or fractional PLL modes
  • Plots open and closed loop gain and phase margin
  • Plots PLL phase noise
  • Supports user defined component values for gain, phase, and phase noise plots
  • Support for Windows 7 or Windows XP (SP 2 is recommended)
TRF3761 Loop Filter Calculator
TRF3761CALC TRF3761CALC is a loop filter design tool for the TRF3761 PLL Frequency Synthesizer with integrated VCO.
  • Calculates loop filter circuit component values based on desired output frequency
  • Identifies TRF3761-x device variant selection based on desired output frequency
  • Identifies appropriate device divide-by mode required for desired output frequency
  • Provides additional information regarding parameter (...)
SLWC085A.ZIP (17 KB)

CAD/CAE symbols

Package Pins Download
VQFN (RHA) 40 View options

Ordering & quality

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