Texas Instruments INA220 User Manual
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Texas Instruments INA220 User Manual

Texas Instruments INA220 User Manual

Evaluation module
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This user's guide describes the characteristics, operation, and use of the INA220 evaluation module
(EVM). It covers all pertinent areas involved to properly use this EVM board. This document includes the
physical printed circuit board layout, schematic diagrams, and circuit descriptions.
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Microsoft, Windows are registered trademarks of Microsoft Corporation.
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C is a trademark of NXP Semiconductors.
All other trademarks are the property of their respective owners.
SBOU079A - July 2009 - Revised February 2010
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Copyright © 2009-2010, Texas Instruments Incorporated
SBOU079A - July 2009 - Revised February 2010
INA220 Evaluation Module
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Summary of Contents for Texas Instruments INA220

  • Page 1: Table Of Contents

    SBOU079A – July 2009 – Revised February 2010 INA220 Evaluation Module This user’s guide describes the characteristics, operation, and use of the INA220 evaluation module (EVM). It covers all pertinent areas involved to properly use this EVM board. This document includes the physical printed circuit board layout, schematic diagrams, and circuit descriptions.

  • Page 2: Overview

    Overview This document provides the information needed to set up and operate the INA220EVM evaluation module, a test platform for the INA220, a high or low side, bi-directional current/power monitor with an I C™ interface. For a more detailed description of the INA220, please refer to the product data sheet (SBOS459) available from the Texas Instruments web site at http://www.ti.com.
  • Page 3 Newer revisions may be available from the TI web site at http://www.ti.com/, or call the Texas Instruments Literature Response Center at (800) 477-8924 or the Product Information Center at (972) 644-5580. When ordering, identify the document by both title and literature number.

  • Page 4: System Setup

    Switched 5.0V Power and GND 25-Pin Male DSUB Signals From USB DIG Platform Address Jumpers Interface INA220 Figure 3. INA220_Test_Board Block Diagram INA220 Evaluation Module SBOU079A – July 2009 – Revised February 2010 Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated...

  • Page 5: Ina220_Test_Board Schematic

    INA220_Test_Board schematic. D1 is an LED that indicates whether the INA220 Test Board is receiving power. Jumpers allow the selection of the power source as well as configuration of A0 and A1. Connector T4 allows the connection of the shunt and bus voltages.

  • Page 6: Signal Definition Of J1 (25-Pin Male Dsub) On Ina220_Test_Board

    No connection Common or ground connection for power SPI_SCK No connection SPI_CS1 No connection SPI_DOUT No connection SPI_DIN1 No connection INA220 Evaluation Module SBOU079A – July 2009 – Revised February 2010 Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated...

  • Page 7: Ina220Evm Hardware Setup

    Figure 5 shows the block diagram for the USB DIG Platform. This platform is a general-purpose data acquisition system that is used on several different Texas Instruments evaluation modules. The details of its operation are included in a separate document (available for download at www.ti.com).

  • Page 8: Typical Hardware Connections

    The INA220EVM hardware setup involves connecting the two PCBs of the EVM together, applying power, and connecting an external shunt and load. The external connections may be the real-world system that the INA220 will be incorporated into. Figure 6 shows the typical hardware connections.

  • Page 9: Connecting Power To The Evm

    INA220EVM Hardware Setup www.ti.com Connecting Power After the two parts of the INA220 EVM are connected, as Figure 7 illustrates, connect the power to the EVM. Always connect power before connecting the USB cable. If you connect the USB cable before connecting the power, the computer will attempt to communicate with an unpowered device that will not be able to respond.

  • Page 10: Connecting The Usb Cable

    Human Interface Drivers by clicking Yes when requested to install drivers. Figure 8. Connecting the USB Cable INA220 Evaluation Module SBOU079A – July 2009 – Revised February 2010 Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated...

  • Page 11: Ina220Evm Default Jumper Settings

    This jumper determines the source for the INA220 power supply. In the Vdut position, the USB DIG JMP1 board supplies the power to the INA220. In the Vs_Ext position, an external supply connected to the INA220 T3 terminal supplies power.

  • Page 12: Usb Dig Platform Jumper Settings

    3V to 5V range will damage the EVM. JUMP18 Connects the pull-up on the GPIO to the V supply or the V supply. INA220 Evaluation Module SBOU079A – July 2009 – Revised February 2010 Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated...

  • Page 13: Power-Supply Jumper Configuration #1

    (U19, REG101) is used to generate a 3V supply for all digital I/O. JUMP14 = BUS JUMP1 = BUS JUMP2 = BUS JUMP6 = 3V JUMP7 = REG (ratiometric mode, 5V supply) SBOU079A – July 2009 – Revised February 2010 INA220 Evaluation Module Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated...

  • Page 14: Ina220 Software Overview

    ) operates over the range of 3V to 5.5V, so be careful to not exceed this range. Connecting External Signals to the INA220EVM The INA220 shunt and bus voltages are applied via terminal block T4. The T4 terminal block is a direct connection to V and V of the INA220.

  • Page 15: Ina220Evm Software-Functioning Properly

    (included with the kit, or available for download in the INA220 product folder) gives more detail regarding the initialization of the software. Starting the INA220EVM Software The INA220 software can be operated through the Windows Start menu. From Start, select All Programs; then select the INA220EVM program. Figure 10 shows how the software should appear if the EVM is functioning properly.

  • Page 16: Ina220Evm Software-No Communication With The Usb Dig Platform

    USB device is properly connected to the PC. Figure 11. INA220EVM Software—No Communication with the USB DIG Platform INA220 Evaluation Module SBOU079A – July 2009 – Revised February 2010 Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated...

  • Page 17: Ina220Evm Software-No Communication With The Usb Dig Platform And Ina220

    Another possible cause of this issue it that the INA220_Test_Board jumpers are set in the wrong position. Figure 12. INA220EVM Software—No Communication with the USB DIG Platform and INA220 SBOU079A – July 2009 – Revised February 2010...
  • Page 18 Registers Tab This tab allows you to read and edit all the registers in the INA220. All the previous tabs affect the register listing. For example, changing the A/D configuration on Tab 2 will affect Register 0 in the register list. It is also true that changing register 0 updates the A/D configuration on Tab 2.

  • Page 19: Evm Controls Drop-Down Menu

    4.3.7 EVM Controls Pull-Down Menu The INA220 Configuration (that is, the register settings) can be saved or loaded using the EVM Controls drop-down menu, as Figure 13 shows. The file that the configuration is saved into is a simple text file and can be viewed with any text editor.

  • Page 20: Bill Of Materials

    Strip, Cage Clamp, Technology Inc 45°, 15A, Dove-tailed 3-pin connector 3-Position Terminal On-Shore ED300/3 Strip, Cage Clamp, Technology Inc 45°, 15A, Dove-tailed INA220 Evaluation Module SBOU079A – July 2009 – Revised February 2010 Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated...
  • Page 21 Section 3.7 ........................• Added Section 3.8 NOTE: Page numbers for previous revisions may differ from page numbers in the current version. SBOU079A – July 2009 – Revised February 2010 Revision History Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated...
  • Page 22 Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
  • Page 23 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.

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