Texas Instruments ADS540x User Manual
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Texas Instruments ADS540x User Manual

Texas Instruments ADS540x User Manual

Evaluation module
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ADS540x and ADS54T0x Evaluation Module (EVM)
This user's guide describes the operation of the Texas Instruments ADS540x or ADS54T0x evaluation
module (EVM). The EVM provides a platform for evaluating the ADS540x or ADS54T0x, a two-channel,
12-bit ADC operating at sampling rates of up to 800 MSPS with the digital data output on two 12-bit LVDS
parallel busses on a Samtec connector.
This EVM is ideally suited for mating with the TSW1400 or TSW1405 Capture Card for performing a data
capture into a capture buffer, uploading the sample data to a PC, performing a Fast Fourier Transform
(FFT), and reporting on signal-to-noise ratio (SNR), spurious-free dynamic range (SFDR), and other
performance metrics.
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1.2
1.3
1.4
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2.1
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3.1
3.2
3.3
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EVM Jumpers and Switches
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EVM Solder Options
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SLAU450 - July 2012
Submit Documentation Feedback
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Copyright © 2012, Texas Instruments Incorporated
Contents
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List of Figures
List of Tables
ADS540x and ADS54T0x Evaluation Module (EVM)
User's Guide
SLAU450 - July 2012
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Summary of Contents for Texas Instruments ADS540x

  • Page 1: Table Of Contents

    This user's guide describes the operation of the Texas Instruments ADS540x or ADS54T0x evaluation module (EVM). The EVM provides a platform for evaluating the ADS540x or ADS54T0x, a two-channel, 12-bit ADC operating at sampling rates of up to 800 MSPS with the digital data output on two 12-bit LVDS parallel busses on a Samtec connector.

  • Page 2: Introduction

    EVM through a single-ended SMA connection, then transformer coupled to turn the single- ended signal into a balanced differential signal, and then input to the ADS540x. A dual transformer input circuit is used for better phase and amplitude balance of the input signal than would typically be produced by a single transformer input circuit.

  • Page 3: Evm Power Supply

    (LDO) regulators are used to generate the 1.8 V for the analog and digital supplies for the ADS540x, the 3.3 V for the 3.3-V analog supply of the ADS540x, and the 3.3-V supply needed for an LVDS buffer to buffer the optional trigger signal into the ADS540x.

  • Page 4: Evm Jumpers And Switches

    There are two pushbutton switches on the EVM. Pushbutton switch SW1 is used to assert a reset signal to the ADS540x. The ADS540x requires a reset before it is configured for use, but it is not necessary to use SW1. The ADS540x SPI GUI may be used to toggle the reset register bit in the ADS540x register map.

  • Page 5: Evm Solder Options

    2 and 3 is designated by 2-3. For more detailed information on the function of each jumper position, consult the ADS540x datasheet. SLAU450 – July 2012 ADS540x and ADS54T0x Evaluation Module (EVM) Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated...

  • Page 6: Square Post Jumpers

    2. The four SPI lines to the ADC (SCLK, SEN, SDATA, SDO) are, by default, driven by the USB port on the EVM under the control of the ADS540x SPI GUI software. Alternatively, drive the SPI signals into the ADC by a field-programmable gate array (FPGA) located on the capture card that connects to the Samtec connector, in which case four surface mount resistors must be removed from their default positions and soldered in the alternate positions.

  • Page 7: Software Control

    The software allows programming control of the ADC device. The front panel provides a tab for full programming of the register map of the ADS540x. The GUI tabs provide a convenient and simplified interface to the most used registers of each device.

  • Page 8: Control Option

    Register Control • Send All: Sends the register configuration to all registers • Read All: Reads register configuration from ADS540x registers (Not implemented in v1.3) • Save Regs: Saves the register configuration for all registers • Load Regs: Load a register file for all registers. Sample configuration files for common frequency plans are located in the install directory.

  • Page 9: Basic Test Procedure

    Connect the USB cable from the TSW140x to a PC for the capture card GUI • Connect the USB cable from the ADS540x to the computer if using the ADS540x SPI GUI • Make sure the following jumpers at their default setting –...

  • Page 10: Ads540X Software Quick Start Guide

    From this point, select digital functions such as test pattern modes, if desired. All commonly used register bits listed in the register map of the ADS540x data sheet have a switch on the front panel of the SPI GUI for easy configuration of the ADS540x.

  • Page 11: Trigger Option Dialog Window

    High Speed Data Converter Pro GUI for different modes of operation or different operating conditions. Figure 8. TSW1405 FFT Result SLAU450 – July 2012 ADS540x and ADS54T0x Evaluation Module (EVM) Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated...
  • Page 12 Any exceptions to this are strictly prohibited and unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory authorities, which is responsibility of user including its acceptable authorization.
  • Page 13 FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
  • Page 14 Also, please do not transfer this product, unless you give the same notice above to the transferee. Please note that if you could not follow the instructions above, you will be subject to penalties of Radio Law of Japan. Texas Instruments Japan Limited (address) 24-1, Nishi-Shinjuku 6 chome, Shinjuku-ku, Tokyo, Japan http://www.tij.co.jp...
  • Page 15 FDA Class III or similar classification, then you must specifically notify TI of such intent and enter into a separate Assurance and Indemnity Agreement. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2012, Texas Instruments Incorporated...
  • Page 16 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue.

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