TIDA-00996

Synchronized Multi-Transmitter Reference Design: Method of Time-Aligning Multiple DACs

TIDA-00996

Design files

Overview

To further increase the range, data rate, and reliability of modern mobile communications systems, system designers continue to place more emphasis on multiple-antenna transmitter systems to achieve combinations of spatial diversity and spatial multiplexing. Such implementations can further compensate for path loss and the multipath effect of transmission mediums. These implementations can also potentially increase range and data rate and improve reliability. Multiple-antenna systems with beamforming techniques also allows for better focus of transmitter energy and the system can potentially reduce the size of an antenna while increasing the transmitter range. More mobile communications systems and radar systems are starting to adopt multiple-antenna transmitters in their designs.

For such multiple-antenna transmitter implementations, each individual transmitter requires digital-to-analog converters (DACs) for the digital bits to RF transmission. Multiple transmitters and the associated antenna must also be synchronized in time. The design may utilize JESD204B subclass 1 type DAC3xJ8x, which has the capability to achieve multiple DAC3xJ8x device synchronization. The DAC3xJ8x is a high-speed 16-bit DAC with up to 2.8 GSPS of sample rate. All of the capabilities of DAC3xJ8x simplify device synchronization and facilitate the design of a multiple-antenna transmitter system.

Features
  • High-Speed Data Transfer
  • High Sample Rate Digital-to-Analog Conversion
  • JESD204B Subclass 1 Support
  • Multi-Device Synchronization
  • Synchronized Clock Distribution

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

TIDUBH1.PDF (6744 K)

Reference design overview and verified performance test data

TIDRL73.PDF (180 K)

Detailed schematic diagram for design layout and components

TIDRLG2.PDF (74 K)

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

TIDRL74.PDF (98 K)

Detailed overview of design layout for component placement

TIDRL76.ZIP (1954 K)

Files used for 3D models or 2D drawings of IC components

TIDRL77.ZIP (5583 K)

Files used for 3D models or 2D drawings of IC components

TIDCC17.ZIP (583 K)

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

TIDRL75.PDF (1779 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

High-speed DACs (>10MSPS)

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

Data sheet document-pdfAcrobat PDF open-in-new HTML
High-speed DACs (>10MSPS)

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

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

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

Data sheet document-pdfAcrobat PDF open-in-new HTML
High-speed DACs (>10MSPS)

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

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

DAC39J82Dual-Channel, 16-Bit, 2.8-GSPS, 1x-16x Interpolating Digital-to-Analog Converter (DAC)

Data sheet document-pdfAcrobat PDF open-in-new HTML
High-speed DACs (>10MSPS)

DAC39J84Quad-Channel, 16-Bit, 2.8-GSPS, 1x-16x Interpolating Digital-to-Analog Converter (DAC)

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide Multi-Transmitter Design Method of Time-Aligning Multiple Design Guide Feb. 09, 2016
Selection guide TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017

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