Synchronized Multi-Transmitter Reference Design: Method of Time-Aligning Multiple DACs
TIDA-00996
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Key Document

Description

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

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TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
DAC37J82  Dual-Channel, 16-Bit, 1.6-GSPS, 1x-16x Interpolating Digital-to-Analog Converter (DAC)  Digital-to-analog converters (DACs)  Sample & Buy View Design Kits & Evaluation Modules
DAC37J84  Quad-Channel, 16-Bit, 1.6-GSPS, 1x-16x Interpolating Digital-to-Analog Converter (DAC)  Digital-to-analog converters (DACs)  Sample & Buy View Design Kits & Evaluation Modules
DAC38J82  Dual-Channel, 16-Bit, 2.5-GSPS, 1x-16x Interpolating Digital-to-Analog Converter (DAC)  Digital-to-analog converters (DACs)  Sample & Buy View Design Kits & Evaluation Modules
DAC38J84  Quad-Channel, 16-Bit, 2.5-GSPS, 1x-16x Interpolating Digital-to-Analog Converter (DAC)  Digital-to-analog converters (DACs)  Sample & Buy View Design Kits & Evaluation Modules
DAC39J82  Dual-Channel, 16-Bit, 2.8-GSPS, 1x-16x Interpolating Digital-to-Analog Converter (DAC)  Digital-to-analog converters (DACs)  Sample & Buy View Design Kits & Evaluation Modules
DAC39J84  Quad-Channel, 16-Bit, 2.8-GSPS, 1x-16x Interpolating Digital-to-Analog Converter (DAC)  Digital-to-analog converters (DACs)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
DAC38J84 Download -

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Technical Documents

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Datasheet (3)
Title Type Size (KB) Date
PDF 3245 26 Jan 2015
PDF 2734 06 May 2014
PDF 2750 24 Mar 2014
User guides (3)
Title Type Size (KB) Date
PDF 1059 28 Apr 2016
PDF 6744 09 Feb 2016
PDF 6664 11 Jan 2016
Selection guides (1)
Title Type Size (KB) Date
PDF 9699 22 Mar 2017
Design files (7)
Title Type Size (KB) Date
PDF 74 21 Apr 2016
ZIP 583 04 Apr 2016
ZIP 5583 04 Apr 2016
ZIP 1954 04 Apr 2016
PDF 1779 04 Apr 2016
PDF 98 04 Apr 2016
PDF 180 04 Apr 2016

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