Optimizing THS4509 to Drive High Speed ADCs Reference Design

(ACTIVE) TIDA-00093

Description & Features

Technical Documents

Support & Training

Order Now


View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


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

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  



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


Bill of Materials (BOM)

Find the complete list of components in this reference design.

Download BOM

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)  Not Available View Design Kits & Evaluation Modules
LMH6554  2.8 GHz Ultra Linear Fully Differential Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
LMH6881  2.4GHz Programmable Differential Amplifier with Gain Control  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
THS4509  Wideband Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
THS770006  High-Speed Fully Differential ADC Driver Amplifier with +6dB Fixed Gain  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TPS2400  Overvoltage/Undervoltage Protection IC in SOT-23-5  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

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 605 24 Mar 2014 19
Design files (2)
Title Abstract Type Size (KB) Date Views
PDF 276 17 Nov 2014 15
PDF 138 17 Nov 2014 32
Related Tools & Software

Software (1)



Support & Training

Try our support forums.
Search expert answers for this part Ask a new question

Content is provided 'AS IS' by the respective TI and Community contributors and does not constitute TI specifications.
See terms of use.

Blogs