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PGA308EVM

User's Guide

Literature Number: SBOU060

July 2008

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Summary of Contents for PGA308

Page 1: ...PGA308EVM User s Guide Literature Number SBOU060 July 2008 ...

Page 2: ...2 SBOU060 July 2008 Submit Documentation Feedback ...

Page 3: ...ng Power 17 3 4 Connecting the USB Cable to the PGA308EVM 18 3 5 Jumper Settings 19 4 PGA308 Software Overview 23 4 1 Operating Systems for the PGA308 Software 23 4 2 PGA308EVM Software Install 23 4 3 Starting the PGA308EVM Software 24 4 4 Using the PGA308 Software 27 4 4 1 Block Diagram 27 4 4 2 Registers in OTP 27 4 4 3 Registers in RAM 27 4 4 4 Calibration 27 4 4 5 Simulation 27 4 4 6 Graph 27 ...

Page 4: ...18 3 5 Default Jumper Settings 19 4 1 PGA308EVM Software Functioning Properly 24 4 2 PGA308EVM Software No Communication with the USB DAQ Platform 25 4 3 PGA308EVM Software No Communication from USB DAQ Platform to PGA308 26 4 4 PGA309 Controls 28 4 5 USB Controls 28 4 6 Current Revision of Software 29 List of Tables 2 1 Signal Definition of J1 11 2 2 Signal Definition of J2 12 3 1 PGA308 Test Boa...

Page 5: ...ts Literature Number PGA308 SBOS440 XTR116 SBOS124 TUSB3210 SLLS466 USB DAQ Platform SBOU056 Information About Cautions and Warnings This document contains caution statements CAUTION This is an example of a caution statement A caution statement describes a situation that could potentially damage your software or equipment The information in a caution or a warning is provided for your protection Pl...

Page 6: ...6 SBOU060 July 2008 Submit Documentation Feedback ...

Page 7: ...vice The PGA308 is a mixed signal programmable gain amplifier that has high resolution gain and offset adjustment capability The PGA308EVM consists of two PCBs One board generates the digital signals USB DAQ Platform required to communicate with the PGA308 PGA308_Test_Board and the second board contains the PGA308 as well as support and configuration circuitry Note Note Much of the information con...

Page 8: ...ti com to verify that you have the latest software version It is also recommended that you watch the QuickStart Video included on the compact disk before using the PGA308EVM The complete kit includes the following items PGA308 test PCB USB DAQ platform PCB USB cable Universal 6V wall wart power supply QuickStart Video Figure 1 1 Hardware Included with the PGA308EVM 8 Overview SBOU060 July 2008 Sub...

Page 9: ...latform generates the digital signals used to communicate with the PGA308 test board Connectors on the PGA308 test board allow for connection to the system that will be monitored by the user Minimim PC operating requirements Microsoft Windows XP or higher including Windows Vista USB port Works on US or European regional settings Figure 2 1 Hardware Setup for the PGA308EVM SBOU060 July 2008 System ...

Page 10: ...igure 2 2 shows the block diagram of the PGA308 test board The PGA308 test board functionality is relatively simple It provides connections to the one wire interface digital to analog converter DAC analog to digital converter ADC and general purpose inputs outputs GPIOs on the USB DAQ platform It also provides connection points for external connection of the bridge sensor reference and outputs Fig...

Page 11: ...ed for single ended measurements 16 bit ΔΣ ADC 1 negative input 7 ADS2_VIN PGA308 VIN2 input 16 bit ΔΣ ADC 2 positive input 8 ADS2_VIN PGA308 VIN1 input 16 bit ΔΣ ADC 2 negative input 9 I2 C_SCK Not used 10 I2 C_SDA2 Not used PGA308 1W pin one wire signal 11 ONE_WIRE derived from the UART on the TUSB3210 device 12 I2 C_SDA_ISO Not used 13 I2 C_SCK_ISO Not used To XTR116 pin 7 on EVM Current loop p...

Page 12: ...scription 1 P3 3 Not used 2 CTRL1 Not used 3 CTRL2 Not used 4 CTRL3 Not used 5 CTRL4 Not used 6 CTRL5 Not used 7 CTRL6 Not used 8 CTRL7 Not used 9 CTRL8 Not used To DOUT on the PGA308 This pin is a measure bit that can read logic signals 10 MEAS1 it is part of an 8 bit group 11 MEAS2 Not used 12 MEAS3 Not used 13 MEAS4 Not used 14 MEAS5 Not used 15 MEAS6 Not used 16 MEAS7 Not used 17 MEAS8 Not use...

Page 13: ...ircuit External Power V 40V DC Loop Measurement Circuitry 15V LOOP 4 20mA Reciever 2x 16 Bit ADC DS 2x 16 Bit ADC DS Calibration EEPROM To Computer and Power Supplies To Test Board www ti com Theory of Operation For the USB DAQ Platform Figure 2 3 shows the block diagram for the USB DAQ platform This platform is a general purpose data acquisition system that is used on several different Texas Inst...

Page 14: ...System Setup 14 SBOU060 July 2008 Submit Documentation Feedback ...

Page 15: ...ed wrist strap at an approved ESD workstation CAUTION Failure to observe ESD handling procedures may result in damage to EVM components A typical PGA308EVM hardware setup connects the two EVM PCBs then supplies power and connects an external shunt and load The external connections may be the real world system to which the PGA308 will be connected Figure 3 1 shows the typical hardware connections F...

Page 16: ... gently push on both sides of the DSUB connectors as shown in Figure 3 2 Make sure that the two connectors are completely socketed together loose connections may cause intermittent EVM operation Figure 3 2 Connecting the Two EVM PCBs Hardware Connections and Jumper Settings 16 SBOU060 July 2008 Submit Documentation Feedback ...

Page 17: ...connect power before connecting the USB cable If the USB cable is connected before the power is supplied the computer will attempt to communicate with an unpowered device and the device will not be able to respond Figure 3 3 Connecting Power to the EVM SBOU060 July 2008 Hardware Connections and Jumper Settings 17 Submit Documentation Feedback ...

Page 18: ...typically changes to Found New Hardware USB Human Interface Device This pop up indicates that the device is ready to be used The USB DAQ platform uses the Human Interface Device Drivers that are part of the Microsoft Windows operating system In some cases the Windows Add Hardware Wizard will pop up If this prompt occurs allow the system device manager to install the Human Interface Drivers by clic...

Page 19: ... of the USB DAQ platform do not need to be changed However you may want to change some of the jumpers on the PGA308 test board to match your specific device configuration for example to change the reference configuration Figure 3 5 Default Jumper Settings SBOU060 July 2008 Hardware Connections and Jumper Settings 19 Submit Documentation Feedback ...

Page 20: ...has a switched capacitor input so it can affect the input signal It is recommended that ADCs be disconnected when using a real world sensor ADS or NC allows you to connect or disconnect the ADC on the USB DAQ platform to the JMP10 ADS PGA308 input Note that the ADC has a switched capacitor input so it can affect the input signal It is recommended that ADCs be disconnected when using a real world s...

Page 21: ...e USB DAQ platform receives power from an JUMP1 EXT external dc power source such as through J5 or T3 The BUS position allows for the USB bus to power the EVM External mode is recommended WP_ON or WP_OFF In the WP_ON position the calibration EEPROM is write protected JUMP11 WP_ON In the WP_OFF position the calibration EEPROM is not write protected SPD_UP or GND In the SPD_UP position the one wire ...

Page 22: ...Hardware Connections and Jumper Settings 22 SBOU060 July 2008 Submit Documentation Feedback ...

Page 23: ...om Install the PGA308EVM software by following these steps 1 Software can be downloaded from the PGA308EVM web page or from the disk included with the PGA308EVM which contains a folder called Install_software 2 Find the file called setup exe Double click the file to start the installation process 3 Follow the on screen prompts to install the software 4 To remove the application use the Windows Con...

Page 24: ...t menu to start the PGA308 software From Start select All Programs then select the PGA308EVM program Figure 4 1 shows the software display if the EVM is functioning properly Figure 4 1 PGA308EVM Software Functioning Properly 24 PGA308 Software Overview SBOU060 July 2008 Submit Documentation Feedback ...

Page 25: ...ly Another possible reason for this error message is a problem with the USB human interface device driver of the computer Make sure that the computer recognizes the device when the USB cable is plugged in If the sound is on you will hear the distinctive sound that you expect when a USB device is properly connected to a PC with the Windows operating system Figure 4 2 PGA308EVM Software No Communica...

Page 26: ...check the connectors between the two boards make sure the two 25 pin DSUB connectors are completely pushed together Another possible cause for this error is it that the PGA308 test board jumpers are set in the wrong positions Figure 4 3 PGA308EVM Software No Communication from USB DAQ Platform to PGA308 PGA308 Software Overview 26 SBOU060 July 2008 Submit Documentation Feedback ...

Page 27: ...r supply select reference voltage This tab allows you to read and write to the OTP registers on the PGA308 Select and copy RAM to seven banks of user OTP Write to final test OTP This tab has the following controls Ability to read from write to each register Detailed help for each register This tab has the following controls Calibrate an external sensor input or sensor emulator input Calibrate volt...

Page 28: ...e that the configuration is saved into is a simple text file and can be viewed with any text editor Figure 4 4 PGA309 Controls The USB Controls feature allows for direct control of communication on the USB DAQ Platform For example direct One Wire DAC and ADC control are possible through this feature Figure 4 5 illustrates the USB controls Figure 4 5 USB Controls PGA308 Software Overview 28 SBOU060...

Page 29: ...s The About feature can be used to check the current revision This document is based on revision 1 2 17 as shown in Figure 4 6 Figure 4 6 Current Revision of Software SBOU060 July 2008 PGA308 Software Overview 29 Submit Documentation Feedback ...

Page 30: ...PGA308 Software Overview 30 SBOU060 July 2008 Submit Documentation Feedback ...

Page 31: ...100kΩ R1 R2 Panasonic ECG ERJ 3EKF1003V SMD Resistor 1kΩ 1 10W 1 0603 2 1kΩ R3 R4 Yageo Corporation RC0603FR 071KL SMD Resistor 10kΩ 1 10W 1 0603 4 10kΩ R10 R12 R23 Yageo Corporation RC0603FR 0710KL SMD Resistor 100Ω 1 10W 1 0603 1 100Ω R20 Yageo Corporation RC0603FR 07100RL SMD Resistor 191kΩ 1 10W 1 0603 1 191kΩ R22 Yageo Corporation ERJ 3EKF1913V SMD Resistor 33Ω 1 10W 1 0603 1 33Ω R13 Yageo Co...

Page 32: ...V Transorb D1 ON Semiconductor P6SMB6 8AT3 SMB IC TRANS NPN SS GP 1 5A Fairchild 1 NPN Q1 BCP55 SOT223 4 Semiconductor 2 position terminal strip cage On Shore 5 ED300 2 T1 T5 ED300 2 clamp 45 15A dove tailed Technology Inc JMP1 JMP7 CONN HEADER 0 100 SNGL 16 HEADER STRIP JMP9 JMP11 3M ESD 929647 09 36 I STR 36POS JMP13 JMP18 Jumpers for SHUNT LP JMP1 JMP7 Tyco 16 W HANDLE 2 Jumper shorting units 8...

Page 33: ...product This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engineer or visit www ti com esh No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine process or combination in which such TI product...

Page 34: ...usiness practice TI is not responsible or liable for any such statements TI products are not authorized for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parties have executed an agreement specifically governing such use Buyers represent that they have all neces...

Page 35: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments PGA308EVM ...

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