Texas Instruments PGA302EVM-037 User Manual Download Page 16 | Manualshive

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SLDU031 – December 2017

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Copyright © 2017, Texas Instruments Incorporated

PGAxxxEVM-037 Pressure Sensor Signal Conditioner Evaluation Module

Figure 11. Analog Front End Page

4.5.1

Offset Correction

The offset correction setting allows the user to adjust the voltage offset of the pressure inputs to account
for minor offset errors and to make full use of the input range of the integrated ADC of the PGAxxx. Offset
correction values from –54.75 mV to +54.75 mV are available, or the offset correction can be turned off
entirely.

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Summary of Contents for PGA302EVM-037

Page 1: ...devices Contents 1 Introduction 2 2 Default Configuration 5 3 EVM Setup and Operation 5 3 1 Quick Start Procedure 5 3 2 VDD Voltage Setup 7 3 3 Pressure Inputs 7 3 4 Temperature Inputs 9 3 5 Voltage Output 10 4 Software 10 4 1 Installation 10 4 2 GUI Navigation 10 4 3 EVM Settings Page 12 4 4 General Settings Page 13 4 5 Analog Front End Page 15 4 6 Output DAC Page 17 4 7 Diagnostics Page 18 4 8 S...

Page 2: ...Jumper Settings Description 5 3 Jumper Settings to Connect Resistive Bridge to Temperature Inputs 10 4 EVM Status Possibilities 13 5 EVM Status Field Descriptions 13 6 Fault Status Indicators 33 7 Bill of Materials 42 Trademarks Microsoft Windows are registered trademarks of Microsoft Corporation All other trademarks are the property of their respective owners 1 Introduction The PGAxxxEVM 037 is a...

Page 3: ...oduction 3 SLDU031 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated PGAxxxEVM 037 Pressure Sensor Signal Conditioner Evaluation Module Figure 1 PGA302EVM 037 Top Board Sections ...

Page 4: ...ided into the following sections 1 Power a External power connectors b Onboard regulators 2 OWI Communication 3 MSPR430F5510 Microcontroller 4 External resistive bridge interface 5 Resistive bridge emulator 6 Programming circuitry NOTE Pictured is a PGA302EVM 037 which does not include additional circuitry for firmware programming and SENT communication that is present on the PGA90xEVM 037 The PGA...

Page 5: ...closed Connect resistive bridge emulator output to VINTP Open Connect VINPP to J2 pin 1 J7 Pins 2 3 Closed Connect resistive bridge emulator output to VINTN Open Connect VINPN to J2 pin 2 J9 Pins 1 2 Closed Power 3 3 V LDO from USB VBUS J11 Closed Connect SENT output 3 EVM Setup and Operation 3 1 Quick Start Procedure The PGAxxxEVM 037 is designed to be ready for immediate evaluation out of the bo...

Page 6: ...al Conditioner Evaluation Module Figure 3 EVM Quick Start Setup 5 Navigate to the GUI installation directory to run the PGAxxx EVM GUI 6 Verify that communication has been established between the EVM and the GUI by checking the EVM Status section in the main panel or in the status bar on the bottom left of the GUI as shown in Figure 4 Figure 4 EVM GUI Connection Status ...

Page 7: ...sted while the PGAxxxEVM 037 is powered up first by pulling the OWI_5P5 pin high with the EVM Pin State controls in the GUI see Section 4 3 2 then by monitoring the voltage on the VDD test point or with the Voltage Monitor tab see section Section 4 15 3 and turning the potentiometer until VDD is between 4 5 V and 5 5 V Figure 5 VDD Voltage Adjustment Potentiometer 3 3 Pressure Inputs The PGAxxxEVM...

Page 8: ...nsor Signal Conditioner Evaluation Module Figure 6 Schematic of Resistive Bridge Emulator The default configuration of the EVM connects the PGAxxx to the resistive bridge emulator with VBRGP and VBRGN supplying voltage while VINPP and VINPN are connected to measure the differential voltage across the legs of the bridge To use an external bridge or pressure sensor remove the jumpers J5 J6 and J7 Ne...

Page 9: ...external temperature sensor inputs can be connected to either the resistive bridge emulator or to an external temperature sensor By default the EVM is configured with the external temperature sensor inputs VINTP and VINTN disconnected from the resistive bridge emulator but accessible via J1 with pin 1 being VINTP and pin 2 being VINTN To use the resistive bridge emulator to test the external tempe...

Page 10: ...ues in analog voltage form via the 14 bit output DAC On the PGAxxxEVM 037 this VOUT voltage can be measured externally at the VOUT_SENT test point or through the GUI which makes use of the internal ADC of the MSP430 to measure the voltage and display it on the Voltage Monitor tab of the GUI 4 Software 4 1 Installation Download and install the GUI from www ti com Navigate to the default installatio...

Page 11: ...ti com Software 11 SLDU031 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated PGAxxxEVM 037 Pressure Sensor Signal Conditioner Evaluation Module Figure 8 GUI Sections ...

Page 12: ...37 Pressure Sensor Signal Conditioner Evaluation Module 4 3 EVM Settings Page Figure 9 EVM Settings Page 4 3 1 EVM Status The GUI can automatically detect the presence of the PGAxxxEVM In the event of a successful or failed connection between the PC MSP430F5510 and PGAxxxEVM 037 the EVM status fields are updated according to Table 4 ...

Page 13: ... read command is successfully executed on the PGA device the status will be updated to Ready If the status reads back Not available use the following checklist to troubleshoot Is the device seated properly in the socket PGA902 904 only Is the PGAxxx 037 EVM powered with a voltage of 7 28 V Is the power supply unit able to source at least 20 mA If the device was powered after the GUI was first init...

Page 14: ...0 General Settings Page 4 4 1 Power Enable Power can be disabled to specific blocks within the PGAxxx device to decrease total power consumption The analog blocks I2C communication OWI communication and SENT OUTPUT PGA904 only can all be individually enabled or disabled to save power 4 4 2 Clock Frequency This section allows the user to control the clock frequency of the internal microcontroller ...

Page 15: ...the START button the GUI will initiate each selected test in turn and will report once all tests are complete and if the any of the tests were failed 4 5 Analog Front End Page The analog front end panel allows the user to configure the AFE portion of the PGAxxx device in an easy to use block diagram format shown in Figure 11 as an initial test and debug measure These same settings are available in...

Page 16: ...ule Figure 11 Analog Front End Page 4 5 1 Offset Correction The offset correction setting allows the user to adjust the voltage offset of the pressure inputs to account for minor offset errors and to make full use of the input range of the integrated ADC of the PGAxxx Offset correction values from 54 75 mV to 54 75 mV are available or the offset correction can be turned off entirely ...

Page 17: ...user defined intervals 4 5 5 T Channel MUX Select The T Channel MUX Select allows the user to determine which signals will be passed through the T Channel to the ADC for sampling The VINTP and VINTN pin option can be selected for use with an external temperature sensor or other sensor To use the internal temperature sensor of the PGAxxx device select the Internal Temp Sense option The Bridge Curre...

Page 18: ...AC page allows the user to quickly test the functionality of the output DAC by inputting specific DAC Values and monitoring the result at the VOUT pin The output DAC and DACCAP connections can also be enabled or disabled from this page To easily read the voltage on VOUT the user can use the Voltage Monitor tab on the tool panel to the right 4 7 Diagnostics Page Figure 13 shows the diagnostics page...

Page 19: ...ion allows the user to enable the sensor diagnostic resistors to monitor short and open conditions on the sensor input pins The output of these diagnostics is available in the Fault Status tab of the tool panel to the right under the AFE Diagnostics Section Short and open conditions can be determined using the VINTP VINTN VINPP and VINPN undervoltage and overvoltage fault status bits in combinatio...

Page 20: ... bits depending on the Enhanced Config Bit value 0b0 12 bits and 0b1 16 bits Both the fast and slow channel communication can be tested from the SENT interface page Note that when a test signal is begun it will continuously output the test data until the SENT interface is disabled 4 9 Memory Map Page The Memory Map shown in Figure 15 allows low level access to all available registers in the PGAxxx...

Page 21: ... com Software 21 SLDU031 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated PGAxxxEVM 037 Pressure Sensor Signal Conditioner Evaluation Module Figure 15 Memory Map Page ...

Page 22: ...The Test Mode page see Figure 16 provides access to the analog and digital test MUX settings of the PGAxxx device The analog and digital test MUX outputs are output through the TEST1 pin while the analog test MUX inputs are connected to the VINTP and VINTN pins A variety of internal signals are accessible through these options for debugging purposes but a full description of this functionality is ...

Page 23: ...r the EEPROM Memory the user can load or save a memory map file as well as program the calculated CRC It is a good practice to verify the EEPROM after each programming procedure Note that the file loaded and saved on this page is interchangeable with the file that can be loaded or saved on the Memory Map page when viewing the EEPROM tab NOTE The OTP Memory and Development RAM Memory sections are o...

Page 24: ...PGAxxx device An OTP file can be loaded and then programmed and verified in the OTP Memory Section When using the DEVRAM the DEVRAM memory space must be remapped to the OTP memory so that the microcontroller operates from the correct memory Select the Remap to OTP radio button and click the DEVRAM Remap button before continuing Once completed a DEVRAM file can be loaded programmed and verified 4 1...

Page 25: ...Once the value is set click NEXT Repeat this process for Vout 2 and Vout 4 8 Before continuing set the number of Average Samples to use in the Advanced Settings section of the page This value can range from 1 to 128 and will average the number of samples selected to generate the ADC value populated in the calibration algorithm Increasing the number of samples averaged will increase the amount of t...

Page 26: ...running the microcontroller and navigate to the Voltage Monitor tab in the tool panel 17 Select the second pressure point in the Resistive Bridge Configuration panel by setting the resistance of the leg to 5 0806k The VOUT voltage in the tool panel should match the voltage selected for the Pressure 2 output during the calibration procedure 4 13 PGA302 EEPROM Settings Page PGA302 Only Figure 19 ill...

Page 27: ...ts can be changed manually if desired 4 13 2 Analog Front End Settings The Analog Front End Settings are the same as those included in the Analog Front End block diagram panel To program the settings in the EEPROM they must be entered in the PGA302 EEPROM Settings panel For a full description of the Analog Front End Settings see Section 4 5 4 13 3 DAC Output Settings The DAC Output Settings allow ...

Page 28: ...P Channel the T Channel or both on the same graph The number of samples recorded can be adjusted from 128 to 4096 By default the graph will continually loop until it is stopped by the user but by unchecking the Loop checkbox the samples will stop when the record length is reached Data can be exported to a txt file format by clicking the Export Data button The file contains all of the data currentl...

Page 29: ...uments Incorporated PGAxxxEVM 037 Pressure Sensor Signal Conditioner Evaluation Module 4 15 Tool Panel Figure 21 Tool Panel 4 15 1 Utilities Tab The UTILITIES tab see Figure 22 includes useful tools for interacting with the low level memory of the PGAxxx device and for communication debugging purposes ...

Page 30: ...ing two fields 4 15 1 2 EVM Low Level Communication The EVM Low Level Communication section allows for direct access to device registers and provides an easy method to debug I2C and OWI communications To configure a specific register enter the I2C device address the PGAxxx device register address desired and the register value in the Data Write field then click the I2C Write button to send the dat...

Page 31: ...ti com Software 31 SLDU031 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated PGAxxxEVM 037 Pressure Sensor Signal Conditioner Evaluation Module Figure 23 Data Log Tab ...

Page 32: ...sure Sensor Signal Conditioner Evaluation Module 4 15 3 Voltage Monitor Tab The Voltage Monitor as illustrated in Figure 24 provides a quick way to check vital system voltages for EVM functionality and debugging purposes These voltages are measured via the ADC in the MSP430 microcontroller included on the EVM Figure 24 Voltage Monitor Tab ...

Page 33: ...ure 25 Fault Status tab Table 6 Fault Status Indicators Fault Indicator Description I2C_ERR An error response on the access from I2C during access to the slave OWI_ERR An error response on the access from OWI during access to the slave TF_ERR Error response on the access from Trace FIFO SYNC 320BPS SYNC field data rate under 320 bits per second SYNC 9600BPS SYNC field data rate over 9600 bits per ...

Page 34: ... 9 times nominal value VINP_OV Overvoltage on VINPP or VINPN pins VINP_UV Undervoltage on VINPP or VINPN pins VINT_OV Overvoltage on VINTP or VINTN pins VINT_UV Undervoltage on VINTP or VINTN pins PGAIN_OV Overvoltage at PGAIN output PGAIN_UV Undervoltage at PGAIN output TGAIN_OV Overvoltage at TGAIN output TGAIN_UV Undervoltage at TGAIN output 4 15 5 Resistive Bridge Configuration Panel Figure 26...

Page 35: ...r 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated PGAxxxEVM 037 Pressure Sensor Signal Conditioner Evaluation Module 5 Board Layout Figure 27 through Figure 30 illustrate the EVM PCB layouts Figure 27 Top Layer ...

Page 36: ... www ti com 36 SLDU031 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated PGAxxxEVM 037 Pressure Sensor Signal Conditioner Evaluation Module Figure 28 Top Component Placement ...

Page 37: ... com Board Layout 37 SLDU031 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated PGAxxxEVM 037 Pressure Sensor Signal Conditioner Evaluation Module Figure 29 Bottom Layer ...

Page 38: ...www ti com 38 SLDU031 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated PGAxxxEVM 037 Pressure Sensor Signal Conditioner Evaluation Module Figure 30 Bottom Component Placement ...

Page 39: ...uments Incorporated PGAxxxEVM 037 Pressure Sensor Signal Conditioner Evaluation Module 6 Schematic and Bill of Materials 6 1 Schematic NOTE The schematic pictured in Figure 31 shows the board configuration for the PGA904EVM which includes additional components populated for OTP programming and a socket for the PGAxxx devices ...

Page 40: ...of Materials www ti com 40 SLDU031 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated PGAxxxEVM 037 Pressure Sensor Signal Conditioner Evaluation Module Figure 31 PGA302EVM Schematic ...

Page 41: ...l of Materials 41 SLDU031 December 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated PGAxxxEVM 037 Pressure Sensor Signal Conditioner Evaluation Module Figure 32 PGAxxxEVM MSP430 Interface Schematic ...

Page 42: ...603 0603 C0603C105K4PACTU Kemet C27 C32 2 220pF CAP CERM 220pF 50V 1 C0G NP0 0603 0603 06035A221FAT2A AVX C28 1 220pF CAP CERM 220 pF 50 V 10 C0G NP0 0603 0603 C0603C221K5GACTU Kemet C30 1 100pF CAP CERM 100 pF 50 V 5 C0G NP0 0603 0603 C0603C101J5GAC Kemet C31 1 2200pF CAP CERM 2200pF 50V 10 X7R 0603 0603 C0603X222K5RACTU Kemet C33 1 0 47uF CAP CERM 0 47 µF 10 V 10 X5R 0402 0402 C1005X5R1A474K050B...

Page 43: ...le R24 1 2 55k RES 2 55 k 0 1 0 1 W 0603 0603 RT0603BRD072K55L Yageo America R25 R29 R30 3 4 99k RES 4 99 k 0 1 0 1 W 0603 0603 RT0603BRD074K99L Yageo America R26 1 2 61k RES 2 61 k 0 1 0 1 W 0603 0603 RT0603BRD072K61L Yageo America R31 R32 2 33 RES 33 ohm 5 0 063W 0402 0402 CRCW040233R0JNED Vishay Dale R33 1 1 5k RES 1 5k ohm 5 0 063W 0402 0402 CRCW04021K50JNED Vishay Dale R34 1 1 07Meg RES 1 07M...

Page 44: ...Instruments Equivalent Texas Instruments U10 1 2 Bit Bidirectional Voltage Level Translator for Open Drain and Push Pull Application DQE0008A DQE0008A TXS0102DQER Texas Instruments Y1 1 Crystal 24 MHz 18 pF SMD ABM3 ABM3 24 000MHZ D2Y T Abracon Corporation C1 0 0 1uF CAP CERM 0 1 µF 50 V 10 X7R 0603 0603 C0603C104K5RACTU Kemet C2 C8 C16 0 0 01uF CAP CERM 0 01 µF 25 V 5 C0G NP0 0603 0603 C0603H103J...

Page 45: ...y set forth above or credit User s account for such EVM TI s liability under this warranty shall be limited to EVMs that are returned during the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repair such EVM or provide replacements Repaired EVMs shall be warr...

Page 46: ...the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this list having a gain greater than the maximum gain indicated for that type are strictly prohibited for use with this device Concernant les EVMs avec antennes détachables Conformément à la réglementation d Industrie Canada le présent émetteur radio peut fo...

Page 47: ...ed loads Any loads applied outside of the specified output range may also result in unintended and or inaccurate operation and or possible permanent damage to the EVM and or interface electronics Please consult the EVM user guide prior to connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation even ...

Page 48: ...COST OF REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE LOSS OF DATA OR BUSINESS INTERRUPTION NO CLAIM SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN TWELVE 12 MONTHS AFTER THE EVENT THAT GAVE RISE TO THE CAUSE OF ACTION HAS OCCURRED 8 2 Specif...

Page 49: ... TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right or other intellectual property right relating to any combination machine or process in which TI product...

Page 50: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments PGA302EVM 037 ...

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