Texas Instruments ADS7041EVM-PDK User Manual Download Page 2

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6.3

Capturing Data with the ADS7041-PDK

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6.4

FFT Analysis

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6.5

Histogram Analysis

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6.6

Offset Calibration

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6.7

Estimated Current Consumption

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6.8

Troubleshooting

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Bill of Materials, PCB Layout, and Schematics

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7.1

Bill of Materials

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7.2

PCB Layout

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7.3

Schematics

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List of Figures

ADS7041EVM Analog Input Connections

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ADS7041EVM Default Jumper Settings

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Bottom View of Simple Capture Card with microSD Memory Card Installed

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Bottom View of ADS7041EVM Board with microSD Memory Card Installed

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Connecting ADS7041EVM Board to Simple Capture Card

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LED Indicators on the Simple Capture Card

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Welcome Screen and Destination Directory Screens

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License Agreement and Start Installation Screens

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Progress Bar and Installation Complete Screens

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Windows 7 Driver Installation Warning

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Simple Capture Card Driver Installation

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Simple Capture Card Driver Completion

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GUI Display Prompt

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Open the Data Capture Page on the GUI

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Data Capture Page

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FFT Performance Analysis Page

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Histogram Analysis Page

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Offset Calibration Page

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Estimated Current Consumption Page

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ADS7041EVM PCB: Top Layer (L1)

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ADS7041EVM PCB: GND Layer (L2)

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ADS7041EVM PCB: Power Layer (L3)

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ADS7041EVM PCB: Bottom Layer (L4)

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List of Tables

Summary of Contents for ADS7041EVM-PDK

Page 1: ...schematic diagrams and a bill of materials The following related documents are available through the Texas Instruments web site at http www ti com Table 1 Related Documentation Device Literature Number OPA835 SLOS713 TPS79101 SLVS325 REG71055 SBAS221 TPS62080 SLVSAE8 TPS3836K33 SGLS322 Contents 1 Overview 3 1 1 ADS7041EVM Features 3 1 2 ADS7041EVM PDK Features 3 2 EVM Analog Interface 3 3 Power Su...

Page 2: ...Agreement and Start Installation Screens 8 9 Progress Bar and Installation Complete Screens 9 10 Windows 7 Driver Installation Warning 9 11 Simple Capture Card Driver Installation 10 12 Simple Capture Card Driver Completion 10 13 GUI Display Prompt 11 14 Open the Data Capture Page on the GUI 12 15 Data Capture Page 13 16 FFT Performance Analysis Page 14 17 Histogram Analysis Page 15 18 Offset Cali...

Page 3: ...e for Microsoft Windows XP Windows 7 and Windows 8 operating systems Built in analysis tools including scope FFT and histogram displays Data collection to text files supported 2 EVM Analog Interface The ADS7041 is an extremely low power extremely small size ADC that supports single channel ended analog inputs The ADS7041EVM uses an OPA835 amplifier to drive the inputs of the ADC The ADS7041EVM is ...

Page 4: ...e values are available in the TPS79101 SGLS160 datasheet Table 3 AVDD Voltage Settings AVDD Voltage R46 R45 C34 1 8 V 14 2 kΩ 30 1 kΩ 33 pF 2 0 V 19 1 kΩ 30 1 kΩ 27 pF 2 5 V 31 6 kΩ 30 1 kΩ 22 pF 3 0 V 43 7 kΩ 30 1 kΩ 15 pF 3 3 V default 51 1 kΩ 30 1 kΩ 15 pF 3 6 V 59 0 kΩ 30 1 kΩ 15 pF Alternatively AVDD may be set by connecting an external power source through P3 Table 4 describes the modificati...

Page 5: ...le 5 explains the configuration for these jumpers Figure 2 ADS7041EVM Default Jumper Settings Table 5 Default Jumper Configurations Reference Default Description Designator Position P2 Open Alternate location for the analog input to the ADS7041EVM unassembled by default P3 Closed Closed to connect onboard 3 3 V supply directly to AVDD of the ADS7041 P4 Open Unassembled by default 5 2 Software Inst...

Page 6: ... Install the microSD Memory Cards on the Simple Capture Card Controller Board As mentioned in the previous section the ADS7041EVM PDK includes two microSD memory cards One is installed on the microSD socket P6 at the back of the Simple Capture Card as shown in Figure 3 The second microSD memory card is installed on the mircoSD socket J2 at the back of the ADS7041EVM as shown in Figure 4 Figure 3 B...

Page 7: ...roperly Step 1 Verify the ADS7041EVM jumpers are configured as shown in Figure 2 Step 2 Verify the microSD card is installed on the back of the Simple Capture Card as shown in Figure 3 Step 3 Verify the microSD card is installed on the back of the EVM board as shown in Figure 4 Step 4 Connect the ADS7041EVM board to the Simple Capture Card as Figure 5 illustrates Figure 5 Connecting ADS7041EVM Boa...

Page 8: ...ired and device driver components Step 4 After the installer begins a welcome screen displays Click Next to continue Step 5 A prompt appears with the destination directory select the default directory under Program Files x86 Texas Instruments ADS7041evm Figure 7 Welcome Screen and Destination Directory Screens Step 6 One or more software license agreements appear Select I Accept the License Agreem...

Page 9: ...Select Install this driver software anyway to install the driver required for proper operation of the software The drivers contained within the installers are safe for installation to your system Figure 10 Windows 7 Driver Installation Warning NOTE Driver installation prompts do not appear if the Simple Capture Card driver has been installed on your system previously 9 SBAU239 November 2014 ADS704...

Page 10: ...l the Simple Capture Card driver as shown in Figure 11 and Figure 12 Step 2 A computer restart may be required to finish the software installation If prompted restart the PC to complete the installation Figure 11 Simple Capture Card Driver Installation Figure 12 Simple Capture Card Driver Completion 10 ADS7041EVM PDK SBAU239 November 2014 Submit Documentation Feedback Copyright 2014 Texas Instrume...

Page 11: ...kit 6 2 Loading the ADS7041EVM Software The ADS7041 EVM software provides the ability to capture and analyze data from the ADS7041 To load the ADS7041 EVM software follow these steps Step 1 Make sure the EVM kit is configured and powered up as explained in Section 5 Step 2 Start the ADS7041 EVM software Go to Start All Programs Texas Instruments ADS7041 EVM and click ADS7041 EVM to run the softwar...

Page 12: ...data versus time To access the Data Capture page hover the cursor over the blue arrow at the left center side of the GUI screen a menu with different GUI pages appears Click on the Data Capture option in the menu as shown in Figure 14 Figure 14 Open the Data Capture Page on the GUI 12 ADS7041EVM PDK SBAU239 November 2014 Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Page 13: ...CS high time between frames Details of the interface protocol can be studied in the serial interface timing diagrams in the ADS7041 datasheet SBAS608 In case the input to this field is beyond the capability calculated based on SCLK it will be constrained to the maximum sampling rate possible at that SCLK frequency Sample Count This option is used to select the number of contiguous samples captured...

Page 14: ...e computed by the GUI based on the Fi Required value entered A minor difference from Fi Required will be seen here to enable a system to be coherent in nature Window The window function is a mathematical function that reduces the signal to zero at the end points of the data block In applications where coherent sampling cannot be achieved a window weighting function can be applied to the data to mi...

Page 15: ...ysis table shown in Figure 17 displays several parameters of the captured data set as described in the following list Please note all results displayed in this page are in LSBs The Min Code Max Code and Mean Code indicators display the minimum maximum and average value of the captured data set The Code Spread column shows the peak to peak spread of the codes in the data set The Sigma indicator dis...

Page 16: ...VM Simply click the Calibrate button The GUI first performs a histogram test for the device described in Section 6 5 and populates the first of the two graphs The pre calibrated Mean code is inserted in the indicator Next the calibration frame is sent to the ADS7041 device that enables the internal offset calibration logic The GUI performs the histogram test for a second time and the second graph ...

Page 17: ...he estimated current and power on the graph and the indicators on this page Figure 19 Estimated Current Consumption Page 6 8 Troubleshooting Although the ADS7041EVM GUI rarely stops responding while the ADS7041EVM PDK is connected in case this does happen unplug the USB cable from the EVM unload the ADS7041EVM PDK software reconnect the ADS7041EVM PDK to the PC and reload the ADS7041EVM software W...

Page 18: ...X ST EM1 1 L1 Inductor 2P Power Choke 1uH 30 Wurth 744029001 2 P2 P4 Uninstalled Uninstalled Header MalE 2Pin 0 100CC 1 P3 Header W Shunt 2P 100LS TL 125 TYCO Electronics 103321 2 9 R1 R2 R3 R4 R5 Resistor 0402 10 0K 1 1 16W Panasonic ERJ 2RKF1002X R6 R7 R83 R85 6 R12 R22 R62 R79 Resistor 0402 0Ω 1 16W Zero Jumper Venkel CR0402 16W 000T R80 R81 2 R13 R14 Resistor 0402 Thick Film 5 1 16W 1 5K Panas...

Page 19: ...gle Bit Dual supply Bus Transceiver Texas Instruments SN74AVCH1T45DBVR 1 U13 IC 1 2A High Efficient Step Down Converter with Snooze Texas Instruments TPS62080DSG Mode SON 8 1 U15 IC Nanopower Supervisory Circuits SOT23 5 Texas Instruments TPS3836K33DBVR 1 for J2 SanDisk microSDHC Card 4GB SANDISK SDSDQ 004G A11M 19 SBAU239 November 2014 ADS7041EVM PDK Submit Documentation Feedback Copyright 2014 T...

Page 20: ...rd layouts are not to scale These figures are intended to show how the board is laid out they are not intended to be used for manufacturing ADS7041EVM PCBs Figure 20 ADS7041EVM PCB Top Layer L1 Figure 21 ADS7041EVM PCB GND Layer L2 20 ADS7041EVM PDK SBAU239 November 2014 Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Page 21: ...als PCB Layout and Schematics Figure 22 ADS7041EVM PCB Power Layer L3 Figure 23 ADS7041EVM PCB Bottom Layer L4 21 SBAU239 November 2014 ADS7041EVM PDK Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Page 22: ...d Schematics www ti com 7 3 Schematics The schematics for the ADS7041EVM are appended to the end of this user s guide 22 ADS7041EVM PDK SBAU239 November 2014 Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated ...

Page 23: ...UG TP2 TP1 TP3 TP4 TP5 GND GND SCLK CS0 MISO VOUT 1 GND 2 ENABLE 3 CPUMP 4 VIN 5 CPUMP 6 U2 REG71055DDC 10µF C5 1µF C3 0 22µF C4 2 2µF C2 5P5V GND 88 7k R48 30 1k R44 GND 10 0 R47 AVDD OPA 1 2 P4 HEADER MALE 2PIN UN DVDD GND EN 1 GND 2 MODE 3 FB 4 VOS 5 PG 6 SW 7 VIN 8 EP 9 U13 TPS62080DSG GND 3 3k R77 5 6k R66 GND L1 1uH 16 2k R74 47µF C57 GND OPA 0 1µF C1 10 0k UN R84 1 5k R13 3 3VD 3 3VD 3 3VD ...

Page 24: ...ring 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 warranted for the remainder of the original warranty period Replaced EVMs shall be warranted for a new full ninety 90 day warranty period 3 ...

Page 25: ...io transmitter has been approved by Industry Canada to operate with the antenna types listed in 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 d...

Page 26: ... 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 with the inputs and outputs kept within the specified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors current sense...

Page 27: ...F 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 ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED 8 2 Specific Limitations IN NO EVENT SHALL T...

Page 28: ...esponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

Page 29: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments ADS7041EVM PDK ...

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