Optimizing THS4509 to Drive High Speed ADCs Reference Design
TIDA-00093
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical Documents

Support & Training

Order Now


See the Important Notice and Disclaimer covering reference designs and other TI resources.


Description

This reference design shows the ability of the high-speed amplifier, THS4509 to perform single-ended to differential conversion to drive high-speed analog-to-digital converters (ADCs) while maintaining excellent noise and distortion performance. Performance versus input frequency is shown for both AC and DC coupled applications while interfaced to the ADS4449 quad, 250-MSPS, 14-bit ADC. Various options for common-mode voltages, power supplies, and interfaces are discussed and measured to meet the requirements of a variety of applications. Anti-aliasing filter examples are shown along with the performance improvements that they provide.

Features
  • High-speed single-ended to differential conversion while maintain excellent performance
  • System performance results for THS4509 driving ADS4449
    - SFDR > 77 dBFs, SNR > 71 dBFS in first Nyquist zone
    - SFDR > 69 dBFs, SNR > 67 dBFS in second Nyquist zone
  • Examples of both AC and DC coupled interfaces
  • Demonstrates anti-aliasing filter design and performance gains
  • Amplifier power supply design considerations for best performance are discussed

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Test Data

Get results faster with test and simulation data that's been verified.

Download Test Data


TI Devices (8)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS4449  Quad-Channel, 14-Bit, 250-MSPS Analog-to-Digital Converter (ADC)  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
LMH6554  2.8 GHz Ultra Linear Fully Differential Amplifier  RF amplifiers  Sample & Buy View Design Kits & Evaluation Modules
LMH6881  2.4GHz Programmable Differential Amplifier with Gain Control  RF amplifiers  Sample & Buy View Design Kits & Evaluation Modules
THS4509  1.9-GHz, Wideband, Low-Noise, Low-Distortion, Fully-Differential Amplifier  RF amplifiers  Sample & Buy View Design Kits & Evaluation Modules
THS770006  High-Speed Fully Differential ADC Driver Amplifier with +6dB Fixed Gain  RF amplifiers  Sample & Buy View Design Kits & Evaluation Modules
TPS2400  5.5V overvoltage protection controller with 100V input transient protection  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS62420  Dual, Adjustable, 600mA and 1000mA, 2.25MHz Step-Down Converter with 1-Wire Interface in QFN  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
TPS7A80  Low-Noise, High-Bandwidth PSRR, 1A Low-Dropout (LDO) Linear Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LMH6554 Download Download
LMH6881 Download Download
THS4509 Download Download
THS770006 Download Download
TPS2400 Download Download
TPS62420 Download Download
TPS7A80 Download

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.


Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guides (1)
Title Type Size (KB) Date
PDF 605 24 Mar 2014
Design files (2)
Title Type Size (KB) Date
PDF 276 17 Nov 2014
PDF 138 17 Nov 2014
Related Tools & Software

Software (1)



Support & training

Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.

Search answers from TI experts

Content is provided 'AS IS' by the respective 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 visit our Support page.

Technical articles