Texas Instruments PGA309EVM-USB User Manual
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Texas Instruments PGA309EVM-USB User Manual

Texas Instruments PGA309EVM-USB User Manual

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This user's guide describes the characteristics, operation, and use of the PGA309EVM-USB evaluation
module (EVM). This EVM is designed to evaluate the performance of the PGA309, a voltage output,
programmable sensor conditioner. This document covers all pertinent areas involved to properly use this
EVM board, allowing for user evaluation suitable to a variety of applications. This document also includes
the physical printed circuit board (PCB) layout and circuit descriptions. A
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SBOU084A - February 2010 - Revised February 2011
Submit Documentation Feedback
is available as a separate download from the TI web site.
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SBOU084A - February 2010 - Revised February 2011
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Summary of Contents for Texas Instruments PGA309EVM-USB

  • Page 1: Table Of Contents

    SBOU084A – February 2010 – Revised February 2011 PGA309EVM-USB This user’s guide describes the characteristics, operation, and use of the PGA309EVM-USB evaluation module (EVM). This EVM is designed to evaluate the performance of the PGA309, a voltage output, programmable sensor conditioner. This document covers all pertinent areas involved to properly use this EVM board, allowing for user evaluation suitable to a variety of applications.

  • Page 2: Introduction And Overview

    Documentation from Texas Instruments. The PGA309EVM-USB is an evaluation module that is used to fully evaluate the PGA309. The PGA309 is an integrated circuit that provides temperature compensation and linearization for bridge sensors. The PGA309EVM-USB consists of two PCBs. One board (the USB-DAQ-Platform) generates the digital signals required to communicate with the PGA309.

  • Page 3: Hardware Included With The Ina282-286Evm

    PGA309EVM-USB Hardware Figure 1 shows the hardware included with the PGA309EVM-USB kit. Contact the factory if any component is missing. It is highly recommended that you check the TI web site (at http://www.ti.com) to verify that you have the latest software. It is also recommended that you refer to the PGA309 User's Guide if you have questions about the PGA309 device itself.
  • Page 4 The following documents provides information regarding Texas Instruments integrated circuits used in the assembly of the PGA309EVM-USB. This user's guide is available from the TI web site under literature number SBOU084. Any letter appended to the literature number corresponds to the document revision that is current at the time of the writing of this document.

  • Page 5: System Setup

    Power PGA309 USB DAQ Test Board Platform Figure 2. PGA309EVM-USB Hardware Setup Theory of Operation for PGA309_Test_Board Hardware Figure 3 shows the block diagram of the PGA309_Test_Board. The PGA309_Test_Board provides connections to the I C™, one-wire, analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) on the USB-DAQ-Platform.
  • Page 6 PGA309EVM-USB software. Using the sensor emulator allows you to get a deeper understanding of the PGA309EVM-USB software and hardware more quickly. When the capabilities and functions of the PGA309EVM-USB are fully understood, you can connect the real-world sensor to the EVM and perform a full calibration.

  • Page 7: Pga309_Test_Board Schematic: Input Circuitry

    System Setup www.ti.com Figure 4. PGA309_Test_Board Schematic: Input Circuitry SBOU084A – February 2010 – Revised February 2011 PGA309EVM-USB Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...

  • Page 8: Pga309_Test_Board Schematic: Power, Reference, And Digital Connections

    System Setup www.ti.com Figure 5. PGA309_Test_Board Schematic: Power, Reference, and Digital Connections PGA309EVM-USB SBOU084A – February 2010 – Revised February 2011 Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...

  • Page 9: Pga309_Test_Board Schematic: Output Circuitry

    The external transistor, Q1, conducts the majority of the full-scale output current. Power dissipation in this transistor can approach 0.8W with high loop voltage (40V) and 20mA output current. SBOU084A – February 2010 – Revised February 2011 PGA309EVM-USB Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...

  • Page 10: Pga309_Test_Board Schematic: Sensor Emulator Circuitry

    DAC output for temperature emulation and to reference the temperature signal to supply or ground. JMP13 allows the resistor network to be bypassed for direct connection to the DAC (diode temperature sensor mode). PGA309EVM-USB SBOU084A – February 2010 – Revised February 2011 Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...

  • Page 11: Pga309_Test_Board Connections To Usb-Daq-Platform And Eeprom

    PGA309. U5 is the EEPROM used to store the calibration look-up table used with the PGA309. Figure 8. PGA309_Test_Board Connections to USB-DAQ-Platform and EEPROM SBOU084A – February 2010 – Revised February 2011 PGA309EVM-USB Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...
  • Page 12 IC, Transistor NPN SS GP 1.5A Fairchild Semiconductor BCP55 SOT223-4 2-Position Terminal Strip, Cage ED300/2 T1, T2, T3, T4, T5 On-Shore Technology Inc ED300/2 Clamp, 45º, 15A, Dove-tailed PGA309EVM-USB SBOU084A – February 2010 – Revised February 2011 Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...
  • Page 13 0.500" length, 0.250" OD, Keystone 2203 Aluminum Iridite Finish Machine Screw, 4-40x3/8" Phillips Screws Building Fasteners PMS 440 0038 PH PanHead, Steel, Zinc Plated SBOU084A – February 2010 – Revised February 2011 PGA309EVM-USB Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...
  • Page 14 DAC B DAC C DAC D ADS1+ ADS1- ADS2+ ADS2– I2C_SCK I2C_SDA2 ONE_WIRE I2C_SCK_ISO I2C_SDA_ISO XTR_LOOP+ XTR_LOOP– INA– +15v –15v SPI_SCK SPI_CS1 SPI_DOUT SPI_DIN1 PGA309EVM-USB SBOU084A – February 2010 – Revised February 2011 Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...
  • Page 15 GPIO CTRL3 CTRL4 CTRL5 CTRL6 CTRL7 CTRL8 MEAS1 Warning MEAS2 GPIO MEAS3 Overlimit MEAS4 Critical MEAS5 MEAS6 MEAS7 MEAS8 SPI_SCK SPI_CS2 SPI_DOUT2 SPI_DIN2 SBOU084A – February 2010 – Revised February 2011 PGA309EVM-USB Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...

  • Page 16: Pga309Evm-Usb Hardware Setup

    USB-DAQ-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). The block...

  • Page 17: Pga309Evm-Usb Typical Hardware Connections

    PGA309EVM-USB Hardware Setup www.ti.com Typical Hardware Connections To set up the PGA309EVM-USB hardware, connect the two halves of the EVM together, apply power, and then connect the external sensor. Figure 10 shows the typical hardware connections. Figure 10. PGA309EVM-USB Typical Hardware Connections SBOU084A –...

  • Page 18: Connecting The Two Evm Pcbs

    PGA309EVM-USB Hardware Setup www.ti.com Connecting the Hardware To connect the two PCBs of the PGA309EVM-USB together, gently push on both sides of the D-SUB connectors (as shown in Figure 11). Make sure that the two connectors are completely pushed together;...

  • Page 19: Connecting Power To The Evm

    PGA309EVM-USB Hardware Setup www.ti.com Connecting Power After the two parts of the PGA309EVM-USB are connected, as shown in Figure 12, 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 20: Connecting The Usb Cable

    PGA309EVM-USB Hardware Setup www.ti.com Connecting the USB Cable to the PGA309EVM-USB Figure 13 shows the typical response to connecting the USB-DAQ-Platform to a PC USB port for the first time. Note that the EVM must be powered on before connecting the USB cable. Typically, the computer will respond with a Found New Hardware, USB Device pop-up.

  • Page 21: Default Jumper Settings (Pga309_Test_Board)

    USB-DAQ-Platform do not need to be changed. You may want to change some of the jumpers on the PGA309_Test_Board to match your specific sensor conditioning design. Figure 14. Default Jumper Settings (PGA309_Test_Board) SBOU084A – February 2010 – Revised February 2011 PGA309EVM-USB Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...

  • Page 22: Default Jumper Settings (Usb-Daq-Platform)

    XTR117 input. For voltage output modules, set this jumper to the NC (no connect) position. For current-loop modules, set this jumper to the Vout to XTR position. PGA309EVM-USB SBOU084A – February 2010 – Revised February 2011 Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...
  • Page 23 RT–. JMP13 = RT, JMP16 = RT+. In this position, the temperature sensor emulation is set for RT+. SBOU084A – February 2010 – Revised February 2011 PGA309EVM-USB Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...
  • Page 24 Connects the pull-up resistor on GPIO to the V supply or the supply. CAUTION Adjusting the value of V beyond the range of 3V to 5V will damage the EVM. PGA309EVM-USB SBOU084A – February 2010 – Revised February 2011 Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...

  • Page 25: Pga309Evm-Usb Software Overview

    Step 4. To remove the application, use the Windows Control Panel utility, Add/Remove Software. Starting the PGA309EVM-USB Software The PGA309EVM-USB software can be operated through the Windows Start menu. From Start, select All Programs; then select the PGA309EVM-USB program. Refer to...

  • Page 26: Pga309Evm-Usb Software: Block Diagram

    Changes made to the block diagram are reflected in the register table. This feature is helpful when users experiment with various aspects of a particular configuration or test setup. Figure 16. PGA309EVM-USB Software: Block Diagram PGA309EVM-USB SBOU084A – February 2010 – Revised February 2011 Submit Documentation Feedback ©...

  • Page 27: Pga309Evm-Usb Software: Registers Tab

    Figure 17 illustrates the Registers tab. Figure 17. PGA309EVM-USB Software: Registers Tab This tab presents a Register Table that shows a summary of the PGA309 device registers. You can select any row in the table by clicking on it with your mouse. When a row is selected, it is highlighted in blue the table.

  • Page 28: Pga309Evm-Usb Software: Set-Up Cal Tab

    18) allows users to create and select files that determine the calibration parameters. Figure 18. PGA309EVM-USB Software: Set-Up Cal Tab The PGA309 has many different operating modes and features. The purpose of this tab is to enable users to create a model file that contains definitions for the operating modes and related features for a particular model.

  • Page 29: Pga309Evm-Usb Software: Auto Calibrate Tab

    After you are confident that you understand the calibration process, you can connect your real-world sensor. Figure 19. PGA309EVM-USB Software: Auto Calibrate Tab SBOU084A – February 2010 – Revised February 2011...

  • Page 30: Pga309Evm-Usb Software: Eeprom Tab

    EEPROM Table Tab The EEPROM Table tab is shown in Figure Figure 20. PGA309EVM-USB Software: EEPROM Tab This tab contains displays for the two different sections of the PGA309 EEPROM. In general, users create the EEPROM table in the Auto-Calibrate tab.

  • Page 31: Pga309Evm-Usb Software: Set-Up Cal Tab With Select Model File Dialog

    Set-Up Cal tab with the Select Model File button highlighted. Once this button is pressed, a dialog box appears that enables users to select a specific model file. Figure 21. PGA309EVM-USB Software: Set-Up Cal Tab with Select Model File Dialog SBOU084A – February 2010 – Revised February 2011...

  • Page 32: Pga309Evm-Usb Software: Set-Up Cal Tab With Create Model Dialog

    ID, Serial Number, and Model Number that will be used during the calibration process. Each of these items is discussed in detail in the following sections. Figure 22. PGA309EVM-USB Software: Set-Up Cal Tab with Create Model Dialog PGA309EVM-USB SBOU084A – February 2010 – Revised February 2011 Submit Documentation Feedback ©...

  • Page 33: Pga309Evm-Usb Software: Set-Up Cal Tab With Sensor Emulator Control Tool Dialog

    The sensor emulator can also help to verify the accuracy of your electronics without sensor hysteresis and non-repeatability issues. Figure 23. PGA309EVM-USB Software: Set-Up Cal Tab with Sensor Emulator Control Tool Dialog SBOU084A – February 2010 – Revised February 2011...

  • Page 34: Pga309Evm-Usb Software: Set-Up Cal Tab With Configure Dmm Interface Dialog

    • GPIB-USB-HS for 34401a Figure 24. PGA309EVM-USB Software: Set-Up Cal Tab with Configure DMM Interface Dialog NOTE: If you use the RS-232 interface, you must configure the Agilent 34401a settings accordingly. If you have difficulty communicating with the instrument, make sure that the instrument is set to RS-232, and that the baud rate and parity match the software settings.

  • Page 35: Pga309Evm-Usb Software: Auto Calibrate Tab With Auto-Continue Feature Enabled

    If the Auto-Continue checkbox is not selected, the software pauses after each calibration step to allow for manual adjustment of temperature or stimulus settings. Figure 25. PGA309EVM-USB Software: Auto Calibrate Tab with Auto-Continue Feature Enabled SBOU084A – February 2010 – Revised February 2011 PGA309EVM-USB Submit Documentation Feedback ©...

  • Page 36: Pga309Evm-Usb Software: Auto Calibrate Tab At Start Of Calibration Process

    The Calibration Info section is the over-temperature data measured throughout the calibration. The Reg Cluster section contains the current register information that is measured. Figure 26. PGA309EVM-USB Software: Auto Calibrate Tab at Start of Calibration Process PGA309EVM-USB SBOU084A – February 2010 – Revised February 2011 Submit Documentation Feedback ©...
  • Page 37 Once a calibration is in progress, the display shows a screen similar to that in Figure Figure 27. PGA309EVM-USB Software: Auto Calibrate Tab with Calibration in Progress The progress of the calibration is shown using LED-style indicators. A green indicator means that the step is completed;...
  • Page 38 (for example, selecting gains and adjusting the non-linearity correction) that are not required during later calibrations. Figure 28. PGA309EVM-USB Software: Auto Calibrate Tab with Second Calibration in Progress PGA309EVM-USB SBOU084A – February 2010 – Revised February 2011 Submit Documentation Feedback ©...
  • Page 39 EEPROM look-up table was created, and the look-up table was written to the EEPROM. Figure 29. PGA309EVM-USB Software: Auto Calibrate Tab with Both Calibrations Complete SBOU084A – February 2010 – Revised February 2011 PGA309EVM-USB Submit Documentation Feedback ©...
  • Page 40 Select a saved pre-cal file using the Select Pre-Cal File button. The Load Pre-Cal file dialog is displayed, as Figure 30 shows. Figure 30. PGA309EVM-USB Software: Create Model, Select Pre-Cal File PGA309EVM-USB SBOU084A – February 2010 – Revised February 2011 Submit Documentation Feedback...
  • Page 41 4.13. The pre-cal file contains the initial register settings, power-supply settings, output modes, output ranges, and other pertinent settings. Figure 31. PGA309EVM-USB Software: Create Model Dialog with Create Pre-Cal File Active SBOU084A – February 2010 – Revised February 2011 PGA309EVM-USB Submit Documentation Feedback ©...
  • Page 42 It displays three graphs that show the operation of the emulated sensor for different pressures and temperatures. The two sliders below the graphs adjust the operating limits. Figure 32. PGA309EVM-USB Software: Create Model Dialog with Create Sensor File Active PGA309EVM-USB SBOU084A –...
  • Page 43 33. These numbers are used in the file name when data are stored at the end of each calibration. Figure 33. PGA309EVM-USB Software: Create Model Dialog with Model ID Active The file name structure is unique, and follows this pattern: •...
  • Page 44 When the model file is completely edited, save the file by hitting the Save button, as indicated in Figure 34. If you wish to overwrite an older file, select an existing file name and then click OK. Figure 34. PGA309EVM-USB Software: Create Model Dialog with Save File Active PGA309EVM-USB SBOU084A – February 2010 – Revised February 2011 Submit Documentation Feedback ©...
  • Page 45 12 fields in sequential order because some of the fields depend on inputs to previous fields. Each of the 12 fields are described in Table Figure 35. PGA309EVM-USB Software: Create Pre-Cal File Dialog with Sensor Emulator Control Tool SBOU084A – February 2010 – Revised February 2011 PGA309EVM-USB Submit Documentation Feedback ©...
  • Page 46 12: Save or Load Files When you have finished editing the pre-cal file, you can either save the file or load the file to the EVM. PGA309EVM-USB SBOU084A – February 2010 – Revised February 2011 Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...
  • Page 47 Figure 36 shows the first three steps in the process. Figure 36. PGA309EVM-USB Software: Create Sensor Emulator File Step 1. Select the way that data are entered for the model. The most common way is to enter raw data. Raw data can either be measured sensor data or values input from a product data sheet.
  • Page 48 Step 1 and Step 2. You must provide the information requested on each tab and then save the sensor emulator file before proceeding to use it. Figure 37. PGA309EVM-USB Software: Create Sensor Emulator File with Additional Tabs PGA309EVM-USB SBOU084A –...
  • Page 49 This tab appears after the temperature range is set on the first tab Figure 38. PGA309EVM-USB Software: Create Sensor Emulator File by Entering Raw Bridge Sensor Data In this example, bridge sensor drift information is loaded by entering the sensor raw data. There are five steps to this process.
  • Page 50 The example shown in Figure 39 uses diode temperature data. Figure 39. PGA309EVM-USB Software: Create Sensor Emulator File by Entering Temperature Data There are two steps to this process. Step 1. Set the diode voltage and the slope. Enter the diode voltage at +25°C and the diode slope (typically –2mV/°C).
  • Page 51 Save tab. Note that the temperature function and sensor over temperature data are displayed for review. Figure 40. PGA309EVM-USB Software: Save a Created Sensor Emulator File SBOU084A – February 2010 – Revised February 2011 PGA309EVM-USB Submit Documentation Feedback...
  • Page 52 ....................Page ........................• Revised Section 4 NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Revision History SBOU084A – February 2010 – Revised February 2011 Submit Documentation Feedback © 2010–2011, Texas Instruments Incorporated...
  • Page 53 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 54 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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