Texas Instruments ADS1285EVM-PDK User Manual
  1. Manuals
  2. Brands
  3. Texas Instruments Manuals
  4. Motherboard
  5. ADS1285EVM-PDK
  6. User manual
Texas Instruments ADS1285EVM-PDK User Manual

Texas Instruments ADS1285EVM-PDK User Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
www.ti.com
User's Guide
ADS1285EVM-PDK Evaluation Module
Cole Macias
This user's guide describes the characteristics, operation, and use of the ADS1285EVM-PDK. This evaluation
module (EVM) is an evaluation board for the ADS1285, a high-performance, 32-bit, multichannel, delta-sigma
(ΔΣ) analog-to-digital converter (ADC). The EVM allows evaluation of all aspects of the ADS1285. This
manual covers the operation of the ADS1285EVM-PDK. Throughout this document, the terms evaluation board,
evaluation module, and EVM are synonymous with the ADS1285EVM-PDK. Complete circuit descriptions,
schematic diagrams, and bills of material are included in this document.
SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022
Submit Document Feedback
ABSTRACT
Copyright © 2022 Texas Instruments Incorporated
ADS1285EVM-PDK Evaluation Module
1

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the ADS1285EVM-PDK and is the answer not in the manual?

Questions and answers

Related Manuals for Texas Instruments ADS1285EVM-PDK

Summary of Contents for Texas Instruments ADS1285EVM-PDK

  • Page 1 Cole Macias ABSTRACT This user's guide describes the characteristics, operation, and use of the ADS1285EVM-PDK. This evaluation module (EVM) is an evaluation board for the ADS1285, a high-performance, 32-bit, multichannel, delta-sigma (ΔΣ) analog-to-digital converter (ADC). The EVM allows evaluation of all aspects of the ADS1285. This manual covers the operation of the ADS1285EVM-PDK.

  • Page 2: Table Of Contents

    Figure 2-2. EVM GUI Global Input Parameters........................... Figure 3-1. Input Terminal Blocks and Headers (Schematic)...................... Figure 3-2. CLK Source (Schematic)............................8 Figure 5-1. ADS1285EVM-PDK AVDD1, AVDD2, and AVSS+5V Supply Generation (Schematic).......... Figure 5-2. ADS1285EVM-PDK Unipolar and Bidirectional Supplies Selection (Schematic)............ Figure 5-3. Voltage Reference (Schematic)..........................12 Figure 7-1.
  • Page 3 Table 9-1. ADS1285EVM-PDK BOM............................Trademarks LabVIEW ® is a registered trademark of National Instruments. All trademarks are the property of their respective owners. SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022 ADS1285EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...

  • Page 4: Evm Overview

    The evaluation kit includes the ADS1285EVM-PDK board and the precision host interface (PHI) controller board. The PHI board enables the accompanying computer software to communicate with the ADC over the universal serial bus (USB) for data capture and analysis because the ADS1285EVM-PDK does not contains a microprocessor on the board.

  • Page 5: Figure 2-2. Evm Gui Global Input Parameters

    ADS1285EVM-PDK Quick-Start Guide 4. Launch the ADS1285EVM-PDK GUI software and power will be supplied to the EVM. a. The default installation path is C:\Program Files (x86)\Texas Instruments\ADS1285 EVM. 5. As shown in Figure 2-2, use the Configuration section of the GUI for a specific clock input, desired data rate, and number of samples.

  • Page 6: Evm Analog Interface

    3 EVM Analog Interface The ADS1285EVM-PDK is designed for easy interfacing with analog sources. This section details the front-end circuit, including jumper configuration for different input test signals and board connectors for signal sources. 3.1 ADC Analog Input Signal Path Analog inputs to the EVM can be connected to either terminal block associated with each ADC channel.

  • Page 7: Figure 3-1. Input Terminal Blocks And Headers (Schematic)

    Channel 2 positive input (Eventually leading to AIN2P) AGND and DGND –VINN2 Channel 2 negative input (Eventually leading to AIN2N) SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022 ADS1285EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...

  • Page 8: Adc Input Clock (Clk) Options

    EVM Analog Interface www.ti.com 3.2 ADC Input Clock (CLK) Options Using the onboard oscillator, clock dividers, and external connectors, the ADS1285EVM-PDK has device configuration flexibility. The ADC operates from CLK, which generates the modulator clock (f ), provided in one of two ways: •...

  • Page 9: Digital Interface

    EEPROM (over I C). The EEPROM comes pre-programmed with the information required to configure and initialize the ADS1285EVM-PDK GUI. When the hardware is initialized, the EEPROM is no longer used. 4.1 Connection to the PHI The ADS1285EVM-PDK board communicates with the PHI through a shrouded, 60-pin connector, J6. There are two round standoffs next to J6 with Phillips-head screws.

  • Page 10: Digital Header

    5.5-V net on the ADS1285EVM-PDK on the board. The EEPROM on the ADS1285EVM-PDK uses a 3.3-V power supply, ID_PWR, generated directly by the PHI. The 3.3-V supply to the digital section of the ADC (3V3_IOVDD) is provided directly by a separate LDO on the PHI.

  • Page 11: Figure 5-2. Ads1285Evm-Pdk Unipolar And Bidirectional Supplies Selection (Schematic)

    AVSS TPS7A3001DRBR Figure 5-2. ADS1285EVM-PDK Unipolar and Bidirectional Supplies Selection (Schematic) AVDD1 is used as the supply for the REF6241, which is a high-precision voltage reference with an integrated high-bandwidth buffer in reference to AVSS. The voltage reference can be used to supply the positive reference, VREFP, for the ADC and DAC using R38 as a pass transistor.

  • Page 12: Digital-To-Analog Converter

    ADS1285. This configuration minimizes potential errors from using separate references between the devices. However, most of the DAC1282 documentation is in reference to a 5-V supply where the ADS1285EVM-PDK uses a 4.096-V reference by default. As a result, the DAC output amplitude is scaled in reference to the 4.096-V...

  • Page 13: Ads1285Evm-Pdk Initial Setup

    After unpacking, the EVM is already configured with the default jumper settings. Figure 7-1 shows the locations for the default jumpers and Table 7-1 shows the functions of the default shunts. Figure 7-1. ADS1285EVM-PDK Jumper Default Settings Table 7-1. Default Shunt Settings Header Designator Position Function [1-2]...

  • Page 14: Evm Graphical User Interface (Gui) Software Installation

    Accept the license agreements and follow the on-screen instructions shown in Figure 7-2 to complete the installation. Figure 7-2. ADS1285 Software Installation Prompt ADS1285EVM-PDK Evaluation Module SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...

  • Page 15: Figure 7-3. Device Driver Installation Wizard Prompts

    ADS1285EVM-PDK Initial Setup As part of the ADS1285EVM-PDK GUI installation, a prompt with a device driver installation (as shown in Figure 7-3) appears on the screen. Click Next to proceed. Figure 7-3. Device Driver Installation Wizard Prompts Note A notice may appear on the screen stating that Windows cannot verify the publisher of this driver software.

  • Page 16: Ads1285Evm-Pdk Software Reference

    Figure 8-1. EVM GUI Global Input Parameters There are four pages available in the ADS1285EVM-PDK GUI. The information area displays the results of each of the pages. Each of these pages display a different control or measurement of the device. The Register Map Config page reads and writes the registers of the device.

  • Page 17: Register Map Configuration Tool

    Figure 8-2. Register Map Configuration Section 8.3 through Section 8.5 describe the data collection and analysis features of the ADS1285EVM-PDK GUI. SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022 ADS1285EVM-PDK Evaluation Module Submit Document Feedback...

  • Page 18: Time Domain Display Tool

    ADC or drive circuits. The user can trigger a capture of the data of the selected number of samples from the ADS1285EVM-PDK, as per the current interface mode settings indicated in Figure 8-3 by using the Capture button.

  • Page 19: Spectral Analysis Tool

    24-bit ADC. The None option corresponds to not using a window (or using a rectangular window) and is not recommended. SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022 ADS1285EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...

  • Page 20: Histogram Tool

    ADC. The frequency is determined by typing a desired frequency into the Desired Frequency (Hz) text box. The GUI automatically displays the closest Freq, M, and N values to achieve the desired output frequency that are ADS1285EVM-PDK Evaluation Module SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...

  • Page 21: Figure 8-6. Dac Configuration Tool Page

    8-6, in combination with selecting 2 V/V for PGA_GAIN and Input 2 for MUX, create the time domain and spectral analysis plots in Figure 8-3 Figure 8-4, respectively. Figure 8-6. DAC Configuration Tool Page SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022 ADS1285EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...

  • Page 22: Ads1285Evm-Pdk Bill Of Materials, Pcb Layout, And Schematics

    ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics www.ti.com 9 ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics 9.1 Bill of Materials Table 9-1 lists the ADS1285EVM-PDK bill of materials (BOM). Table 9-1. ADS1285EVM-PDK BOM Designator Quantity Value Description Package...
  • Page 23 ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics Table 9-1. ADS1285EVM-PDK BOM (continued) Designator Quantity Value Description Package PartNumber Manufacturer Alternate Alternate Reference PartNumber Manufacturer C50, C51 47nF 0.047 µF ±1% 25V C0805C473F3GAC KEMET Ceramic Capacitor C0G, 7800 NP0 0805 (2012 Metric) CAP, CERM, 1 µF, 16 V,+/-...
  • Page 24 ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics www.ti.com Table 9-1. ADS1285EVM-PDK BOM (continued) Designator Quantity Value Description Package PartNumber Manufacturer Alternate Alternate Reference PartNumber Manufacturer 11.3k RES, 11.3 k, 1%, 0.1 W, RC0603FR-0711K3 Yageo 0603 R28, R36, R41, 10.0k RES, 10.0 k, 1%, 0.1 W,...
  • Page 25 ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics Table 9-1. ADS1285EVM-PDK BOM (continued) Designator Quantity Value Description Package PartNumber Manufacturer Alternate Alternate Reference PartNumber Manufacturer Vin -3V to -36V, DRB0008A TPS7A3001DRBR Texas Instruments TPS7A3001DRBT Texas Instruments -200mA, Ultra-Low-Noise, High-PSRR, Low-Dropout...
  • Page 26 ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics www.ti.com Table 9-1. ADS1285EVM-PDK BOM (continued) Designator Quantity Value Description Package PartNumber Manufacturer Alternate Alternate Reference PartNumber Manufacturer R51, R52 22.6k RES, 22.6 k, 1%, 0.1 W, CRCW060322K6F Vishay-Dale AEC-Q200 Grade 0, 0603 ADS1285EVM-PDK Evaluation Module SBAU394A –...

  • Page 27: Pcb Layout

    ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics 9.2 PCB Layout Figure 9-1 through Figure 9-6 show the ADS1285EVM-PDK PCB layout. Figure 9-1. Top Silkscreen Figure 9-2. Top Layer Figure 9-3. Ground Layer 1 Figure 9-4. Power Layer Figure 9-5. Bottom Layer Figure 9-6.

  • Page 28: Schematics

    ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics www.ti.com 9.3 Schematics Figure 9-7 shows a block diagram of the ADS1285EVM-PDK. ADS1285EVM Power Reference PHI (FPGA motherboard) Interface Inputs The following schematic pages map to specific blocks represented in the block diagram above.

  • Page 29: Figure 9-8. Ads1285Evm-Pdk Adc Schematic

    ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics Figure 9-8 through Figure 9-13 illustrate various schematics for the ADS1285EVM-PDK ADC. All jumpers should be installed to provide power to the ADC AVDD1 AVDD2 DVDD 0.1uF AVSS AVSS DVDD 0.1uF...

  • Page 30: Figure 9-9. Ads1285Evm-Pdk Analog Inputs And Common-Mode Buffer

    TLV9041 can AVSS replace AVSS AVSS To bypass buffer Common-mode buffer Figure 9-9. ADS1285EVM-PDK Analog Inputs and Common-Mode Buffer Schematic ADS1285EVM-PDK Evaluation Module SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...

  • Page 31: Figure 9-10. Ads1285Evm-Pdk Clock And Interface

    ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics DVDD 49.9 DAC_4MHZ External clock 0.1uF 100k CLK Options: 8 MHz 1) FPGA provides CLK output Output 4 MHz 2) External oscillator drives CLK (default) 5.5V Tri-state 5.5V ECS-2520MVLC-081.92-BN-TR ~RESET CLK DIS...

  • Page 32: Figure 9-11. Ads1285Evm-Pdk Power-Supply Schematic

    ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics www.ti.com AVDD1 supply for ADS1285 AVDD2 supply for ADS1285 5.5V AVDD1 Default: 5V 5.5V AVDD2 10uF Default: 3V AVDD supply for DAC1282 SENSE/FB 10uF AVSS AVSS 10uF SENSE/FB 5.5V AVSS+5V 10uF 6P4V2...

  • Page 33: Figure 9-12. Ads1285Evm-Pdk Reference Voltage Schematic

    ADS1285EVM-PDK Bill of Materials, PCB Layout, and Schematics On-board references AVDD1 Header for measuring reference voltage or connecting to an external reference source NOTE: This reference voltage is shared between the ADS1285 and DAC1282 1µF OUT_F VREFP AVSS 0.22...

  • Page 34: References

    Changes from Revision * (April 2022) to Revision A (September 2022) Page • Changed document to align with new evaluation module...................1 ADS1285EVM-PDK Evaluation Module SBAU394A – APRIL 2022 – REVISED SEPTEMBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
  • Page 35 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 36 www.ti.com Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and software developers to write software applications for use with the end product.
  • Page 37 www.ti.com Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à...
  • Page 38 www.ti.com EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices.
  • Page 39 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 © 2019, Texas Instruments Incorporated...
  • Page 40 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2022, Texas Instruments Incorporated...

Table of Contents