400-MHz to 4.2-GHz Quadrature Modulator with Integrated Wideband PLL/VCO


Product details


Frequency (Min) (MHz) 400 Frequency (Max) (MHz) 4200 I/Q input common-mode voltage (Typ) 0.25 PLL/VCO Yes P1dB (Typ) (dBm) 12 Output IP3 (Typ) (dBm) 31 Noise floor (Typ) (dBm/Hz) -159 Unadjusted carrier suppression (Typ) (dBm) -50 Unadjusted sideband suppression (Typ) (dBc) -50 open-in-new Find other IQ modulators

Package | Pins | Size

VQFN (RGZ) 48 49 mm² 7 x 7 open-in-new Find other IQ modulators


  • IQ Modulator with Integrated PLL and VCO
  • Integer-N/Fractional-N PLL
  • Modulator Supports 400 MHz to 4200 MHz
  • PLL and VCO Supports 280 MHz to 4100 MHz
  • OIP3 at 900 MHz = 31 dBm
  • OIP3 at 1800 MHz = 30 dBm
  • VCO 1800-MHz Open Loop Phase Noise = –141 dBc/Hz at 1 MHz Offset
  • Independent LO Output Supports divide-by 1/2/4/8
  • Modulator Low Power and High Gain Modes
  • Multiple Power Down Modes
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The TRF3722 is a high performance direct conversion quadrature modulator with exceptional linearity and low noise performance. The typical
0.25-V baseband common mode voltage supports seamless interface with current source DACs. The device integrates the PLL and VCO to provide the local oscillator (LO) to the modulator. The PLL and VCO provides excellent phase noise performance to satisfy the most stringent transmit communication requirements. The device also provides additional LO output for driving a second modulator or down converting mixer. The modulator features a high gain mode for a typical 3-dB gain increase and a low power mode when power optimization is desired.

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Technical documentation

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Type Title Date
* Data sheet TRF3722 Quadrature Modulator with Integrated PLL and VCO datasheet (Rev. B) Feb. 27, 2017
Application note TRF3722 Operation with Local Oscillator (LO) 3rd Harmonic (Rev. A) Jul. 02, 2018
Technical article Can a clock generator act as a jitter cleaner? Mar. 23, 2017
Selection guide TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
Technical article Don’t let bad reference signals destroy the phase noise in your PLL/synthesizer Jan. 10, 2017
Technical article A survival guide to scaling your PLL loop filter design Nov. 22, 2016
Technical article What to do when your PLL does not lock Jul. 12, 2016
User guide TSW3XJ8XEVM User's Guide (Rev. B) Mar. 09, 2016
Design guide TRF3722 RF Output S22 File Sep. 04, 2014

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 TRF3722EVM is the evaluation module (EVM) designed for testing the performance of the TRF3722 high-performance, quadrature modulator with integrated PLL and VCO. The TRF3722 is a direct up-conversion RF device which integrates a highly-linear, low-noise IQ modulator and a wideband (...)

  • The TRF3722EVM comes configured for differential I/Q input signals via four SMA connectors.
  • There is an on board SMA connector which is used to monitor the RF output signal from the quadrature modulator.
  • The LO signal is provided either internally (on-chip) or externally through an SMA connector.
  • The (...)
document-generic User guide

The TSW38J84EVM Evaluation Module is an evaluation board that allows system designers to evaluate the performance of Texas Instruments' dual transmit signal chain consisting of the DAC38J84, TRF3722, TRF3705, and the LMK04828. For ease of use as a complete dual RF transmit solution the TSW38J84EVM (...)

  • Complete bits-to-RF dual transmit signal chain solution utilizing the JESD204B interface
  • TRF3722 integrated modulator and RF synthesizer reduces solution size and simplifies layout
  • Enables evaluation of RF performance of both TRF3722 and TRF3705 modulators
  • Includes LMK04828 for onboard clock generation (...)

Software development

SLAC661.ZIP (182158 KB)
SLOC306.ZIP (120791 KB)

Design tools & simulation

SLWM004.ZIP (20 KB) - S-Parameter Model
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

1-GHz Bandwidth Dual Channel Transmitter up to 4-GHz Reference Design
TIDA-00409 The TSW38J84 EVM reference design provides a platform to demonstrate a wideband dual transmit solution that incorporates an integrated LO.  The reference design utilizes the 2.5 GSPS DAC38J84 device with the high performance modulators: TRF3722 (including integrated PLL/VCO) and TRF3705. The (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
VQFN (RGZ) 48 View options

Ordering & quality

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