1-GHz Bandwidth Dual Channel Transmitter up to 4-GHz Reference Design


Design files


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 TRF3722 and TRF3705 can be combined to form a dual transmit solution with the TRF3722 generating the local oscillator (LO) for both modulators. The interface between the DAC38J84 and the modulators is discussed as well as measurements showing the combined performance of the DAC and modulators. The measurements illustrate the bandwidth performance, output third order intercept performance, harmonic distortion and sideband suppression performance.

  • Complete bits-to-RF dual transmit signal chain solution utilizing the JESD204B interface
  • Provides a platform to test 2.4 GSPS DAC38J84 with two high performance modulators
  • Output frequency of TRF3722 and TRF3705 is up to 4 GHz
  • The solution can support up to 1 GHz of bandwidth
  • Dual transmit solution for modern communication, military and test and measurement system
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Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU673.PDF (186 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers

TIDC991.ZIP (2605 K)

Design file that contains information on physical board layer of design PCB


Includes TI products in the design and potential alternatives.

High-speed DACs (>10 MSPS)

DAC37J82Dual-Channel, 16-Bit, 1.6-GSPS, 1x-16x Interpolating Digital-to-Analog Converter (DAC)

Data sheet: PDF | HTML
High-speed DACs (>10 MSPS)

DAC37J84Quad-Channel, 16-Bit, 1.6-GSPS, 1x-16x Interpolating Digital-to-Analog Converter (DAC)

Data sheet: PDF
High-speed DACs (>10 MSPS)

DAC38J82Dual-Channel, 16-Bit, 2.5-GSPS, 1x-16x Interpolating Digital-to-Analog Converter (DAC)

Data sheet: PDF | HTML
High-speed DACs (>10 MSPS)

DAC38J84Quad-Channel, 16-Bit, 2.5-GSPS, 1x-16x Interpolating Digital-to-Analog Converter (DAC)

Data sheet: PDF
Clock jitter cleaners & synchronizers

LMK04828Ultra low-noise JESD204B compliant clock jitter cleaner with integrated 2370 to 2630-MHz VCO0.

Data sheet: PDF | HTML
IQ modulators

TRF3705300MHz to 4GHz Quadrature Modulator

Data sheet: PDF | HTML
IQ modulators

TRF3722400-MHz to 4.2-GHz Quadrature Modulator with Integrated Wideband PLL/VCO

Data sheet: PDF | HTML

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Evaluation board

TSW38J84EVM — TSW38J84 Evaluation Module

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 (...)

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Technical documentation

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Type Title Date
Design guide Wideband Dual Transmit Solution With Integrated Local Oscillator Dec. 12, 2014

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