300M-4800MHz Low Noise Integer-N/Fractional-N PLL with Integrated VCO and up to 8 Outputs


Product details


Integrated VCO Yes Output frequency (Min) (MHz) 300 Output frequency (Max) (MHz) 4800 Normalized PLL phase noise (dBc/Hz) -221 Current consumption (mA) 115 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -106 open-in-new Find other RF PLLs & synthesizers

Package | Pins | Size

VQFN (RHB) 32 25 mm² 5 x 5 open-in-new Find other RF PLLs & synthesizers


  • Output Frequencies: 300 MHz to 4.8 GHz
  • Low-Noise VCO: –133 dBc/Hz
    (1-MHz Offset, fOUT = 2.65 GHz)
  • 13-/16-Bit Reference/Feedback Divider
  • 25-Bit Fractional-N and Integer-N PLL
  • Low RMS Jitter: 0.35 ps
  • Input Reference Frequency Range:
    0.5 MHz to 350 MHz
  • Programmable Output Divide-by-1/-2/-4/-8
  • Four Differential LO Outputs
  • External VCO Input with Programmable VCO
    On/Off Control
open-in-new Find other RF PLLs & synthesizers


The TRF3765 is a wideband Integer-N/Fractional-N frequency synthesizer with an integrated, wideband voltage-controlled oscillator (VCO). Programmable output dividers enable continuous frequency coverage from 300 MHz to 4.8 GHz. Four separate differential, open-collector RF outputs allow multiple devices to be driven in parallel without the need of external splitters.

The TRF3765 also accepts external VCO input signals and allows on/off control through a programmable control output. For maximum flexibility and wide reference frequency range, wide-range divide ratio settings are programmable and an off-chip loop filter can be used.

The TRF3765 is available in an RHB-32 QFN package.

open-in-new Find other RF PLLs & synthesizers

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 12
Type Title Date
* Data sheet TRF3765 Integer-N/Fractional-N PLL With Integrated VCO datasheet (Rev. E) Jan. 07, 2016
User guide TSW12J54EVM User's Guide Oct. 21, 2015
Application note Analog Applications Journal 2Q 2015 Apr. 28, 2015
Application note JESD204B multi-device synchronization: Breaking down the requirements Apr. 28, 2015
Application note Characterization Report for FMC30RF Sep. 18, 2014
Technical article Increasing dynamic performance in radar systems May 10, 2014
User guide TRF3765 EVM User's Guide (Rev. A) Jul. 02, 2012
Application note TRF3765 Synthesizer Lock Time Feb. 06, 2012
Application note TRF3765 REF_IN Impedance Application Note Jan. 11, 2012
Application note Low supply TRF3765 performance evaluation Jan. 04, 2012
Application note TRF3765 Output Terminations Jan. 04, 2012
Application note Supply Noise Effect on Oscillator Phase Noise Nov. 22, 2011

Design & development

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

Hardware development

document-generic User guide

The DAC34SH84EVM is a circuit board that allows designers to evaluate the performance of Texas Instruments' four-channel, ultra-low power, 16-bit, 1.5 GSPS DAC34SH84 digital-to-analog converter (DAC) with 32-bit wide DDR LVDS data input, integrated 2x/4x/8x/16x interpolation filters, 32-bit NCO and (...)

  • Comprehensive test capability for the DAC34SH84
  • Direct connection to TSW1400/TSW3100 signal generator
  • Includes CDCE62005 for clock generation or jitter cleaning
  • Software support with a full featured GUI for easy testing and prototyping
  • FMC-DAC-Adapter card compatible to connect with FMC interconnect (...)
    document-generic User guide
    The TRF3765EVM evaluation module is intended to enable the evaluation of the TRF3765 Integer-N/Fractional-N PLL with Integrated VCO for wideband frequency synthesis. Applications include Wireless Infrastructure, Wireless Local Loop, Point-to-Point Wireless Access, and Wireless MAN Wideband (...)
  • The TRF3765EVM can be ordered pre-configured for either integer or fractional mode operation
  • Differential LO outputs are provided through SMA connectors
  • DC noise filter board included with EVM kit
  • On-board or external reference clock may be applied
  • Register control is provided through a USB cable
    document-generic User guide

    RF Sampling 4GSPS ADC with 8GHz DC-Coupled Fully differential Amplifier. Provides a wide bandwidth high performance AC- or DC-coupled capture platform with up to 2 GHz of continous capture bandwidth. Built-in DDC functions enable tuning, down-conversion and bandwidth reduction of captured signals (...)


    • 12-bit 4GSPS ADC - ADC12J4000
    • 8GHz Fully Differential Amplifier - LMH5401
    • 4.8 GHz Low Phase Noise PLL/VCO TRF3765
    • Clock Jitter Cleaner LMK04828
    • Complete TI Power Solution
    • 2GHz Butterworth Low Pass Filter Design

    document-generic User guide

    The TSW3065EVM is based on Texas Instruments integer-N / Fractional –N frequency synthesizer with integrated wideband VCO TRF3765. Its frequency ranges from 300 MHz to 4.8 GHz. It provides programmable output power with a combination of amplifier and programmable attenuator. TSW3065EVM has an (...)

  • 4 LO outputs and optional external VCO Input
  • Uses 6-V DC Power Supply (included) or 5-V DC USB supply (from laptop/computer)
  • On-board 10MHz reference clock or external reference
  • Frequency selection between 4 pre-programmed dip switch setting at 950, 1960, 2140 or 3500MHZ
  • GUI controls available for (...)
  • Software development

    SLWC103D.ZIP (31910 KB)
    SLWC108.ZIP (122887 KB)
    PLUG-IN Download
    Abaco Systems® FMC30RF FPGA mezzanine card
    Provided by Abaco Systems — The FMC30RF is an FMC daughter card which is fully compliant with the VITA 57.1 FMC standard. The FMC30RF offers in a small footprint, a low power and fully featured Rx/Tx signal path for the development of advanced RF solutions. With a frequency range coverage from 400 MHz to 3.0 GHz and up to 30 (...)

    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)

    Reference designs

    RF Sampling 4-GSPS ADC Reference Design with 8-GHz DC-Coupled Differential Amplifier
    TIDA-00431 Wideband radio frequency (RF) receivers allow greatly increased flexibility in radio designs. The wide instantaneous bandwidth allows flexible tuning without changing hardware and the ability to capture multiple channels at widely separated frequencies.

    This reference design describes a wideband RF (...)

    document-generic Schematic
    4 GHz Clock Reference Design for 12 Bit High Speed ADCs in Digital Oscilloscopes & Wireless Testers
    TIDA-01015 — The TIDA-01015 is a clocking solution reference design for high speed direct RF sampling GSPS ADCs. This design showcases the significance of the sampling clock to achieve high SNR for 2nd Nyquist zone input signal frequencies. ADC12J4000 is a 12-bit, 4-GSPS RF sampling ADC with 3-dB input bandwidth (...)
    document-generic Schematic
    50-Ohm 2-GHz Oscilloscope Front-end Reference Design
    TIDA-00826 This reference design is part of an analog front-end for 50Ω-input oscilloscope application. System designers can readily use this evaluation platform to process input signals from DC to 2 GHz in both frequency-domain and time-domain applications.
    document-generic Schematic
    Clocking Solution Reference Design for GSPS ADCs
    TIDA-00359 Low cost, high performance clocking solution for GSPS data converters. This reference design discusses the use of a TRF3765, a low noise frequency synthesizer, generating the sampling clock for a 4 GSPS analog-to-digital converter (ADC12J4000). Experiments demonstrate data sheet comparable SNR and (...)
    document-generic Schematic document-generic User guide

    CAD/CAE symbols

    Package Pins Download
    VQFN (RHB) 32 View options

    Ordering & quality

    Information included:
    • RoHS
    • REACH
    • Device marking
    • Lead finish/Ball material
    • MSL rating/Peak reflow
    • MTBF/FIT estimates
    • Material content
    • Qualification summary
    • Ongoing reliability monitoring

    Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

    Support & training

    TI E2E™ forums with technical support from TI engineers

    Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

    If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​