Texas Instruments ADS7057 User Manual
Texas Instruments ADS7057 User Manual

Texas Instruments ADS7057 User Manual

Evaluation module

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This user's guide describes the characteristics, operation, and use of the ADS7057 evaluation module
(EVM) performance demonstration kit (PDK). This kit is an evaluation platform for the ADS7057 device,
which is a 14-bit, 2.5-MSPS, differential analog input, successive approximation register (SAR) analog-to-
digital converter (ADC) that features an easy-to-use SPI. This evaluation module can also be used for
performance evaluation of ADS7054 (14-bit, 1-MSPS, differential analog input SAR ADC). The EVM-PDK
eases evaluation with hardware, software, and computer connectivity through the universal serial bus
(USB) interface. This user's guide includes complete circuit descriptions, schematic diagrams, and a bill of
materials (BOM).
The following related documents are available through the
......................................................................................................................
1
Overview
2
Analog Interface
3
Digital Interfaces
4
Power Supplies
SBAU302 – December 2017
Submit Documentation Feedback
Table 1. Related Documentation
Device
ADS7057
ADS7054
THS4551
TPS79901
REF1933
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Copyright © 2017, Texas Instruments Incorporated
ADS7057 Evaluation Module
Texas Instruments
Literature Number
SBAS821
SBAS859
SBOS778
SBVS056
SBOS697
Contents
User's Guide
SBAU302 – December 2017
website.
ADS7057 Evaluation Module
3
3
4
5
1

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Summary of Contents for Texas Instruments ADS7057

  • Page 1 This user's guide describes the characteristics, operation, and use of the ADS7057 evaluation module (EVM) performance demonstration kit (PDK). This kit is an evaluation platform for the ADS7057 device, which is a 14-bit, 2.5-MSPS, differential analog input, successive approximation register (SAR) analog-to- digital converter (ADC) that features an easy-to-use SPI.
  • Page 2: Table Of Contents

    Microsoft, Windows are registered trademarks of Microsoft Corporation. LabVIEW is a trademark of National Instruments. All other trademarks are the property of their respective owners. ADS7057 Evaluation Module SBAU302 – December 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 3: Analog Input Connector Description

    (PHI) controller board that enables the accompanying computer software to communicate with the ADC over USB for data capture and analysis. The ADS7057EVM board includes the ADS7057 SAR ADC, all the peripheral analog circuits, and the components required to achieve optimum performance from the ADC.
  • Page 4: Ads7057Evm Analog Input Path

    RC filter with values of 10 Ω and 680 pF was selected to achieve a SINAD greater than 79 dB and a THD less than –85 dB for a 2-kHz sine wave input at full throughput of the ADS7057 of 2.5 MSPS.
  • Page 5: Voltage Settings For Avdd And

    Power Supplies The ADS7057 supports a wide range of operation on its analog supplies. The AVDD operates from 2.35 V to 3.6 V. The DVDD operates from 1.65 V to 3.6 V, independent of the AVDD supply. The analog portion of the ADS7057EVM operates from a 5.5-V supply, which in turn generates the 5-V V...
  • Page 6: Ads7057Evm-Pdk Initial Setup

    Use pin 1 of these jumpers as an alternate location to provide the differential J3, J6, J8, J9 Open input to ADC A (U2) and ADC B (U7) ADS7057 Evaluation Module SBAU302 – December 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 7: Ads7057Evm Software Installation Prompts

    EVM Graphical User Interface Software Installation The following steps describe how to install the software for the ADS7057 EVM graphical user interface (GUI). 1. Download the latest version of the EVM GUI installer from the Software section of the...
  • Page 8: Device Driver Installation Wizard Prompts

    NOTE: A notice may appear on the screen stating that Windows cannot verify the publisher of this driver software. Select the Install this driver software anyway option. ADS7057 Evaluation Module SBAU302 – December 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 9: Labview Run-Time Engine Installation

    The device requires the LabVIEW™ Run-Time Engine (see Figure 5) and may prompt for the installation of this software, if not already installed. Figure 5. LabVIEW Run-Time Engine Installation SBAU302 – December 2017 ADS7057 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 10: Ads7057Evm-Pdk Installation Final Step

    ADS7057EVM-PDK Initial Setup www.ti.com 4. After these installations, check the Create Desktop Shortcut box, as Figure 6 shows. Figure 6. ADS7057EVM-PDK Installation Final Step ADS7057 Evaluation Module SBAU302 – December 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 11: Ads7057Evm-Pdk Operation

    LEDs D1 and D2 on the PHI start flashing, indicating that the PHI is booted up and communicating with the PC. Figure 7. EVM-PDK Hardware Setup and LED Indicators SBAU302 – December 2017 ADS7057 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 12: Launch The Evm Gui Software

    3. Launch the device EVM GUI software from the installed path, as Figure 8 shows, or using the desktop shortcut created during installation. Figure 8. Launch the EVM GUI Software ADS7057 Evaluation Module SBAU302 – December 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 13: Evm Gui Global Input Parameters

    This page, therefore, allows various settings available on the device to be tested in a repetitive fashion until arriving at the best settings for the corresponding test scenario. SBAU302 – December 2017 ADS7057 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 14: Time Domain Display Tool Options

    Figure 10. Time Domain Display Tool Options ADS7057 Evaluation Module SBAU302 – December 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 15: Spectral Analysis Tool

    11) is intended to evaluate the dynamic performance (SNR, THD, SFDR, SINAD, and ENOB) of the ADS7057 SAR ADC through the use of a single-tone, sinusoidal signal FFT analysis, using the 7-term Blackman-Harris window setting. Alternatively, the window setting of None can be used to search for noise spurs over frequency in DC inputs.
  • Page 16: Histogram Analysis Tool

    DC input applied to a given channel. The histogram corresponding to a DC input is displayed by clicking the Capture button, as Figure 12 shows. Figure 12. Histogram Analysis Tool ADS7057 Evaluation Module SBAU302 – December 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 17: Ads7057 Calibration

    Offset Calibration The ADS7057 device can calibrate its own internal offset. The offset calibration can be initiated by the user either on power up or during normal operation. During offset calibration, the analog input pins (AINP and AINM) are disconnected from the sampling stage and connected to an internal reference. The result of the offset calibration is stored in an internal register.
  • Page 18 Performance Evaluation of ADS7054 Using ADS7057 EVM The ADS7054 is a slower sampling variant of the ADS7057 (1 MSPS vs 2.5 MSPS). Therefore, the ADS7054 performance can be inferred using the ADS7057 EVM GUI by restricting the Sample Rate(sps) Target value to no greater than 1M.
  • Page 19: Bill Of Materials, Printed-Circuit Board Layout, And Schematics

    CAP, CERM, 0.01 uF, 10 V, +/- 10%, X7R, 0402 C1005NP01H102J050BA C11, C22, C24, C41 TDK CAP, CERM, 1000 pF, 50 V, +/- 5%, C0G/NP0, 0402 SBAU302 – December 2017 ADS7057 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 20 RES, 0, 5%, 0.063 W, 0402 R34, R42, R50 CRCW04024R70JNED Vishay-Dale RES, 4.7, 5%, 0.063 W, 0402 Texas Instruments Low Noise Negative Bias Generator, 8-pin Mini SOIC, Pb-Free ADS7057 Evaluation Module SBAU302 – December 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 21: Ads7057Evm Pcb Layer 1: Top Layer

    Figure 17 show the EVM PCB layout. Figure 14. ADS7057EVM PCB Layer 1: Top Layer Figure 15. ADS7057EVM PCB Layer 2: GND Plane SBAU302 – December 2017 ADS7057 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 22: Ads7057Evm Pcb Layer 3: Power Planes

    Bill of Materials, Printed-Circuit Board Layout, and Schematics www.ti.com Figure 16. ADS7057EVM PCB Layer 3: Power Planes Figure 17. ADS7057EVM PCB Layer 4: Bottom Layer ADS7057 Evaluation Module SBAU302 – December 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 23: Schematic Diagram (Page 1) Of The Ads7057Evm Pcb

    Bill of Materials, Printed-Circuit Board Layout, and Schematics www.ti.com Schematics Figure 18. Schematic Diagram (Page 1) of the ADS7057EVM PCB SBAU302 – December 2017 ADS7057 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 24: Schematic Diagram (Page 2) Of The Ads7057Evm Pcb

    Bill of Materials, Printed-Circuit Board Layout, and Schematics www.ti.com Figure 19. Schematic Diagram (Page 2) of the ADS7057EVM PCB ADS7057 Evaluation Module SBAU302 – December 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 25 STANDARD TERMS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms set forth herein.
  • Page 26 FCC Interference Statement for Class B EVM devices NOTE: 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.
  • Page 27 【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの 措置を取っていただく必要がありますのでご注意ください。 1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用 いただく。 2. 実験局の免許を取得後ご使用いただく。 3. 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ ンスツルメンツ株式会社 東京都新宿区西新宿6丁目24番1号 西新宿三井ビル 3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧ください。http:/ /www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 3.4 European Union 3.4.1 For EVMs subject to EU Directive 2014/30/EU (Electromagnetic Compatibility Directive): This is a class A product intended for use in environments other than domestic environments that are connected to a low-voltage power-supply network that supplies buildings used for domestic purposes.
  • Page 28 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2017, Texas Instruments Incorporated...
  • Page 29 IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES Texas Instruments Incorporated (‘TI”) technical, application or other design advice, services or information, including, but not limited to, reference designs and materials relating to evaluation modules, (collectively, “TI Resources”) are intended to assist designers who are developing applications that incorporate TI products;...

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