User's Guide SLAU262C – January 2009 – Revised May 2011 ADS79xxEVM and ADS79xxEVM-PDK Figure 1. ADS7953EVM (Left) and ADS7953EVM-PDK (Right) This users guide describes the characteristics, operation, and use of the ADS7953EVM, ADS7957EVM and ADS7961EVM, both by themselves and as part of the ADS7953EVM-PDK, ADS7957EVM-PDK or ADS7961EVM-PDK. These evaluation modules (EVMs) are evaluation boards for the ADS7953, a 12-bit, 16-channel, successive approximation register (SAR) analog-to-digital converter (ADC), and the ADS7957 and ADS7961, which are 10-bit and 8-bit variations of the ADS7953. The EVM allows evaluation of all aspects of the ADS7953, ADS7957 or ADS7961 device. Complete circuit descriptions, schematic diagrams, and bills of material are included in this document. The following related documents are available through the Texas Instruments website at http://www.ti.com. ADCPro is a trademark of Texas Instruments. Microsoft, Windows XP are registered trademarks of Microsoft Corporation. I2C is a trademark of NXP Semiconductors. All other trademarks are the property of their respective owners. SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback ADS79xxEVM and ADS79xxEVM-PDK Copyright © 2009–2011, Texas Instruments Incorporated 1 www.ti.com 1 2 3 4 5 6 7 8 9 Contents EVM Overview ............................................................................................................... 3 Analog Interface ............................................................................................................. 4 Digital Interface .............................................................................................................. 5 Power Supplies .............................................................................................................. 6 Voltage Reference .......................................................................................................... 6 EVM Operation .............................................................................................................. 6 ADS7953EVM-PDK Kit Operation ........................................................................................ 8 Evaluating Performance with the ADCPro Software .................................................................. 19 Schematic and Bill of Materials .......................................................................................... 26 List of Figures 1 ADS7953EVM (Left) and ADS7953EVM-PDK (Right) ................................................................. 1 2 ADS7953EVM Default Jumper Locations................................................................................ 7 3 MMB0 Initial Setup 4 Connecting an AC Adapter ............................................................................................... 10 5 Laboratory Power-Supply Connection .................................................................................. 11 6 NI-VISA Driver Installation 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 ......................................................................................................... ............................................................................................... NI-VISA Driver Installation Question ................................................................................... NI-VISA Driver Installing ................................................................................................. NI-VISA Driver Complete Installation .................................................................................. NI-VISA Driver Verification Using Device Manager .................................................................. ADCPro Software Start-up Display Window ........................................................................... ADS7953EVM-PDK Plug-In Display Window .......................................................................... Install New Driver Wizard Screen 1 ..................................................................................... Install New Driver Wizard Screen 2 ..................................................................................... Install New Driver Wizard Screen 3 ..................................................................................... Install New Driver Wizard Screen 4 ..................................................................................... Install New Driver Wizard Screen 5 ..................................................................................... USBSytx Driver Verification Using Device Manager ................................................................. Channel Enable ............................................................................................................ Manual Channel Control .................................................................................................. Serial Clock, Input Range and MS Nibble settings ................................................................... High and Low Alarm Limits by Channel ................................................................................ GPIO and System Monitor Control options ............................................................................ GPIO selection, controls and indicators ................................................................................ Progress Bar While Collecting Data .................................................................................... ADS7953EVM Schematic ................................................................................................ 9 12 12 13 13 14 14 15 16 16 17 17 18 18 20 21 22 23 24 25 26 27 List of Tables 2 1 EVM-Compatible Device Data Sheets ................................................................................... 3 2 Primary Analog Interface Pinout .......................................................................................... 4 3 Secondary Analog Interface Pinout....................................................................................... 4 4 Serial Interface Pins ........................................................................................................ 5 5 P3 Configuration: Power-Supply Input ................................................................................... 6 6 List of Jumpers .............................................................................................................. 7 7 ADS7953EVM Bill of Materials ADS79xxEVM and ADS79xxEVM-PDK .......................................................................................... 28 SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated EVM Overview www.ti.com 1 EVM Overview Table 1. EVM-Compatible Device Data Sheets 1.1 Device Literature Number ADS7953, ADS7952, ADS7951, ADS7950, ADS7957, ADS7956, ADS7955, ADS7954, ADS7961, ADS7960, ADS7959, ADS7958 SLAS605 OPA365 SBOS365 REF5025 SBOS410 Features ADS7953EVM/ADS7957EVM/ADS7961 EVM Features: • Contains all support circuitry needed for the ADS7953/ADS7957/ADS7961 • Voltage reference options: external or onboard • Buffer options: onboard analog input buffer can be bypassed • GPIO access with HI or LO alarm options to interrupt host processor • Compatible with the TI Modular EVM System ADS7953EVM/ADS7957EVM/ADS7961EVM-PDK Features: • Easy-to-use evaluation software for Microsoft® Windows XP® • Data collection to text files • Built-in analysis tools including scope, FFT, and histogram displays • Complete control of board settings • Easily expandable with new analysis plug-in tools from Texas Instruments For use with a computer, the ADS79xxEVM Performance Demonstration Kit (PDK) is available. This kit combines the ADS7953EVM, ADS7957EVM or ADS7961EVM board with the TMS320VC5507 DSP-based MMB0 motherboard, and includes ADCPro™ software for evaluation. The MMB0 motherboard allows the ADS79xxEVM to be connected to the computer via an available USB port. This manual shows how to use the MMB0 as part of the ADS79xxEVM-PDK, but does not provide technical details about the MMB0 itself. ADCPro is a program for collecting, recording, and analyzing data from ADC evaluation boards. It is based on a number of plug-in programs, so it can be expanded easily with new test and data collection plug-ins. The ADS79xxEVM-PDK is controlled by a plugin running in ADCPro. For more information about ADCPro, see the ADCPro Analog-to-Digital Converter Evalutation Software Users Guide, available for download from the TI website. This manual covers the operation of all three ADS7953, ADS7957 and ADS7961 devices refered to as the ADS79xxEVM and the ADS79xxEVM-PDK. Throughout this document, the abbreviation EVM and the term evaluation module are synonymous with the ADS79xxEVM. For clarity of reading, the rest of this manual will refer only to the ADS7953EVM or ADS7953EVM-PDK. The individual kit contains one ADS7953EVM, ADS7957EVM or ADS7961EVM, but operation of the EVM and kit for the ADS7957 or ADS7961 is identical, unless otherwise noted. 1.2 Introduction The ADS7953EVM is an evaluation module built to the TI Modular EVM System specification. It can be connected to any of the modular EVM system interface cards available from Texas Instruments. The ADS7953EVM is available as a stand-alone printed circuit board (PCB) or as part of the ADS7953EVM-PDK, which includes an MMB0 motherboard and software. As a stand-alone PCB, the ADS7953EVM is useful for prototyping designs and firmware. Note that the ADS7953EVM has no microprocessor and cannot run software. To connect it to a computer, some type of host processor interface capable of generating the necessary control signals is required. SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback ADS79xxEVM and ADS79xxEVM-PDK Copyright © 2009–2011, Texas Instruments Incorporated 3 Analog Interface 2 www.ti.com Analog Interface For maximum flexibility, the ADS7953EVM is designed for easy interfacing to multiple analog sources. Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual-row, header/socket combination at P1. This header/socket provides access to the analog input pins associated with CH0-CH7 of the ADS7953. Consult Samtec at http://www.samtec.com or call 1-800-SAMTEC-9 for a variety of mating connector options. Samtec part number TMS-108-02-G-D provides access to analog input channels CH8-CH15 at J1. Most of the pins on P1 and J1 are directly connected to the ADS7953 using a simple R/C filter with no additional overvoltage protection circuitry. Use appropriate caution when handling these pins. Table 2 and Table 3 summarize the pinouts for analog interfaces P1 and J1, respectively. Table 2. Primary Analog Interface Pinout Pin Number Signal P1.2 CH7 CH7 input Description P1.4 CH6 CH6 input P1.6 CH5 CH5 input P1.8 CH4 CH4 input P1.10 CH3 CH3 input P1.12 CH2 CH2 input P1.14 CH1 CH1 input P1.16 CH0 CH0 input P1.18 EXTREFN External reference source input (– side of differential input) P1.20 EXTREFP External reference source input (+ side of differential input) J9.15 Unused — P1.1-19 (odd) AGND Analog ground connections (except J1.15) Table 3. Secondary Analog Interface Pinout 4 Pin Number Signal J1.2 CH15 CH15 input Description J1.4 CH14 CH14 input J1.6 CH13 CH13 input J1.8 CH12 CH12 input J1.10 CH11 CH11 input J1.12 CH10 CH10 input J1.14 CH9 CH9 input J1.16 CH8 CH8 input J1.1-15 (odd) AGND ADS79xxEVM and ADS79xxEVM-PDK Analog ground connections SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated Digital Interface www.ti.com 3 Digital Interface 3.1 Serial Data Interface The ADS7953EVM is designed to easily interface with multiple control platforms. Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual-row, header/socket combination at P2. This header/socket provides access to the digital control and serial data pins of the ADC. Consult Samtec at http://www.samtec.com or call 1-800-SAMTEC-9 for a variety of mating connector options. Table 4 describes the P2 serial interface pins. Table 4. Serial Interface Pins Pin No. Pin Name Signal Name I/O Type Pullup P2.1 CNTL CS In None Controls CS input, Jumper option with P2.7 via W5 P2.2 GPIO0 GPIO2 In/Out High GPIO P2.3 CLKX SCLK In None ADS79xx serial clock P2.4 DGND DGND NA None Digital Ground P2.5 CLKR CLKR Out None serial clock return to DSP P2.6 GPIO1 GPIO3 In/Out High GPIO P2.7 FSX FSYNC Xmit In None Controls CS input, Jumper option with P2.1 via W5 P2.8 GPIO2 Unused NA NA P2.9 FSR FSYNC rtrn Out None P2.10 DGND DGND NA None Digital Ground P2.11 DX DIN In None ADS79xx SPI data in P2.12 GPIO3 Unused NA NA P2.13 DR DOUT Out None P2.14 GPIO4 Unused NA NA P2.15 /INT GPIO0/GPIO1 Out None 2 SCL SCL IC™ P2.17 TOUT Unused NA NA P2.18 DGND DGND NA None P2.19 GPIO5 Unused NA NA P2.20 SDA SDA I2C n/a P2.16 3.2 Function n/a ADS79xx data out Hi/Lo Alarm Interrupt options I2C clock Digital Ground I2C data Data Output All output data communications are directed through DOUT. The data from all 16 channels can be observed on the DOUT pin. This is the signal that is used by the ADS7953EVM-PDK to read back and display all the channel data via the ADCPro software. SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback ADS79xxEVM and ADS79xxEVM-PDK Copyright © 2009–2011, Texas Instruments Incorporated 5 Power Supplies 4 www.ti.com Power Supplies P3 is the power-supply input connector. Table 5 lists the configuration details for P3. Only +5V analog and +5V digital is required to power the EVM. If desired, a jumper option (W6) is provided to supply the ADS7953 digital core with +3.3V. Table 5. P3 Configuration: Power-Supply Input Pin No. Pin Name J3.1 +VA +10V to +15V No J3.2 –VA –10V to –15V No J3.3 +5VA +5V analog supply Always J3.4 –5VA –5V analog supply No J3.5 DGND Digital ground input Yes J3.6 AGND Analog ground input Yes J3.7 +1.8VD 1.8V digital supply No Not used No 3.3V digital supply Yes, if +5VD is not used +5V Yes, if +3.3VD is not used J3.8 VD1 J3.9 +3.3VD J3.10 +5VD Function Required The ADS7953 digital section can be powered from +3.3V or +5V by means of jumper option W6. 5 Voltage Reference The ADS7953EVM has three sources for the reference voltage. Jumper W2 can select the REFP voltage from either the REF5025(U3) or from an external source applied to P1.18. Jumper W3 can select the REFM voltage from either the analog ground (AGND) or from an external source applied to P1.20. 6 EVM Operation The following section provides information on the analog input, digital control, and general operating conditions of the ADS7953EVM. 6.1 Analog Input Eight of the analog input sources (channels 0-7) can be applied directly to P1 (top or bottom side) or through signal-conditioning modules available for the modular EVM system. The additional eight channel sources (CH8-CH15) can be applied to connector J1. The analog input range on the EVM is identical to that of the installed device and is dependent on the RANGE setting of the ADC (0 to 5V or 0 to 2.5V) Each input signal can be configured to connect directly to the analog inputs of the ADS7953 through a 33Ω series resistor with an 0.027pF capacitor to AGND. The input to CH0 can use the OPA365 buffer that is provided (default condition, W4 jumpered pins 1-2). Jumper W4 can be placed on pins 2-3 to bypass the unity gain buffer configuration of the OPA365. 6.2 Digital Control The digital control signals can be applied directly to P5 (top or bottom side). The modular ADS7953EVM can also be connected directly to a DSP or microcontroller interface board, such as the 5-6KInterface or HPA-MCUInterface boards available from Texas Instruments. When purchased as part of a PDK, the ADS7953EVM can be controlled by the MMB0. For a list of compatible interface and/or accessory boards for the EVM or the ADS7953, see the relevant product folder on the TI website. All of the digital signals are controlled directly with pins on P2. 6 ADS79xxEVM and ADS79xxEVM-PDK SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated EVM Operation www.ti.com 6.3 ADS7953EVM-PDK Power Supply The analog portion of the ADS7953EVM can either be powered by a 5V source generated via ac adapter or by applying the +5VA to the connector on the MMB0 board. The MMB0 board will provide the digital 5V and 3.3V to the ADS7953EVM. To provide +5VA to the ADS7953EVM from the MMB0 board, make sure the jumper at J13 (on the MMB0) is closed from +5V to +5VA. 6.4 Default Jumper Settings Figure 2 shows the jumpers found on the EVM and the respective factory default conditions for each. Figure 2. ADS7953EVM Default Jumper Locations Table 6 lists the jumpers found on the EVM and the respective factory default conditions for each. Table 6. List of Jumpers Switch Default Position W1 Open Switch Description W2 Short 1-2 W2 selects the REFP source, onboard (default) or external via P1.18 W3 Short 1-2 W3 selects the REFM source, AGND (default) or external via P1.20 W4 Short 1-2 W4 selects the CH0 input configuration, buffered (default) or bypassed W5 Short 1-2 W5 selects the CS source on the ADS7953, FSX (default) or CNTL W6 Short 1-2 W6 selects the DVDD Voltage, +5VD (default) or +3.3VD W7 Short 1-2 W7 selects the host processor interrupt source, GPIO1 (default) or GPIO0 W1 is not installed in production boards SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated ADS79xxEVM and ADS79xxEVM-PDK 7 ADS7953EVM-PDK Kit Operation 7 www.ti.com ADS7953EVM-PDK Kit Operation This section provides information on using the ADS7953EVM-PDK, including setup, program installation, and program usage. To prepare to evaluate the ADS7953 with the ADS7953EVM-PDK, complete the following steps: Step 1. Install the ADCPro software (if not already installed) on a PC. Step 2. Install the ADS7953EVM-PDK EVM plug-in software. Step 3. Set up the ADS7953EVM-PDK. Step 4. Connect a proper power supply or use the included AC adapter. Step 5. Complete the NI-VISA USB driver installation process. Step 6. Run the ADCPro software. Step 7. Complete the Microsoft Windows USB driver installation process. Each task is described in the subsequent sections of this document. 7.1 Installing the ADCPro Software CAUTION Do not connect the ADS7953EVM-PDK before installing the software on a suitable PC. Failure to observe this caution may cause Microsoft Windows to not recognize the ADS7953EVM-PDK. The latest software is available from the TI website at http://www.ti.com/. The ADCPro installer will check for updates when executed (if connected to the Internet), and then gives the option of downloading and installing the latest version. See the ADCPro Analog-to-Digital Converter Evalutation Software Users Guide for instructions on installing and using ADCPro. To install the ADS7953EVM-PDK plug-in, run the file: ads7953evm-pdk-plugin-1.1.0.exe (1.1.0 is the version number, and increments with software version releases). Double-click the file to run it; then follow the instructions shown. Also, use the ADCPro Update Check feature to check for newer versions of the ADS7953EVM-PDK plug-in, once one version has been installed. The software should now be installed, but the USB drivers may not have been loaded by the PC operating system. This step will complete when the ADCPro software is executed. 7.2 Setting Up the ADS7953EVM-PDK The ADS7953EVM-PDK contains both the ADS7953EVM and the MMB0 motherboard; however, the devices are shipped unconnected. Follow these steps to set up the ADS7953EVM-PDK: Step 1. Unpack the ADS7953EVM-PDK kit. Step 2. Set the jumpers and switches on the MMB0 as shown in Figure 3. • Set the Boot Mode switch to USB. • Connect +5V and +5VA on jumper block J13 (if +5V is supplied from J14 +5VA). • Leave +5V and +VA disconnected on jumper block J13. • If the PDK will be powered from an ac adapter, connect J12. If the PDK will be powered through the terminal block, disconnect J12 (see Section 7.3 of this document for additional power supply connection details). 8 ADS79xxEVM and ADS79xxEVM-PDK SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated ADS7953EVM-PDK Kit Operation www.ti.com Figure 3. MMB0 Initial Setup Step 3. Plug the ADS7953EVM into the MMB0. The female portion of P1, P2 and P3 on the EVM align with male connectors J7, J4 and J5 respective on the MMB0. CAUTION Do not misalign the pins when plugging the ADS7953EVM into the MMB0. Check the pin alignment of P1, P2, and P3 carefully before applying power to the PDK. Step 4. Verify the jumpers on the ADS7953EVM are as shown in Figure 2 (note that these settings are the factory-configured settings for the EVM). 7.2.1 About the MMB0 The MMB0 is a Modular EVM System motherboard. It is designed around the TMS320VC5507, a DSP with an onboard USB interface from Texas Instruments. The MMB0 also has 16MB of SDRAM installed. The MMB0 is not intended to be used as a DSP development board, and it is not available separately. TI cannot offer support for the MMB0 except as part of an EVM-PDK kit. For schematics or other information about the MMB0, contact Texas Instruments. 7.3 Connecting the Power Supply The ADS7953EVM-PDK can be operated with a unipolar +5V supply or a combination of +5V and +3.3V supplies. When the MMB0 DSP is powered properly, LED D2 glows green. The green light indicates that the 3.3V supply for the MMB0 is operating properly. (It does not indicate that the EVM power supplies are operating properly.) SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback ADS79xxEVM and ADS79xxEVM-PDK Copyright © 2009–2011, Texas Instruments Incorporated 9 ADS7953EVM-PDK Kit Operation 7.3.1 www.ti.com Connecting an AC Adapter An ac adapter can be connected to barrel jack J2 on the MMB0. J2 is located next to the USB connector. The adapter must output 6V-7V dc. The connector must be sleeve-negative, tip-positive. It should have a current rating of at least 2A. Jumper J12 on the MMB0 connects a wall-mounted power supply to the board. To use the wall-mount supply, J12 must be shorted. Figure 4 illustrates how to connect an ac adapter to the MMB0. Figure 4. Connecting an AC Adapter 7.3.2 Connecting a Laboratory Power Supply A laboratory power supply can be connected through terminal block J14 on the MMB0, as shown in Figure 5. To • • • use a unipolar lab power supply configuration: Disconnect J12 on the MMB0. Connect a +5V dc supply to the +5VD terminal on J14. Connect ground of the dc supply to the GND terminal on J14. It is not necessary to connect a +5V dc supply voltage to the +5VA terminal on J14 if the +5V/+5VA position on J13 is shorted. 10 ADS79xxEVM and ADS79xxEVM-PDK SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated ADS7953EVM-PDK Kit Operation www.ti.com Figure 5. Laboratory Power-Supply Connection 7.4 Running the Software and Completing Driver Installation Note: The software is continually under development. These instructions and screen images are current at the time of this writing, but may not exactly match future releases. The program for evaluating the ADS7953EVM-PDK is called ADCPro. This program uses plug-ins to communicate with the EVM. The ADS7953EVM-PDK plug-in is included in the ADS7953EVM-PDK package. The program currently runs only on Microsoft Windows platforms of Windows XP; Windows Vista is NOT supported at the time of this writing. If this is the first time installing ADCPro and the EVM plug-ins, follow these procedures to run ADCPro and complete the necessary driver installation. 7.4.1 NI-VISA USB Device Driver Installation 1. After the ADCPro software is installed, apply power to the PDK and connect the board to an available PC USB port. 2. The computer should recognize new hardware and begin installing the drivers for the hardware. Figure 6 through Figure 10 are provided for reference to show the installation steps. • For the first screen, Figure 6, it is not necessary to search for the software; it has already been installed to the PC. • For the remaining steps, accept the default settings. SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback ADS79xxEVM and ADS79xxEVM-PDK Copyright © 2009–2011, Texas Instruments Incorporated 11 ADS7953EVM-PDK Kit Operation www.ti.com Figure 6. NI-VISA Driver Installation Figure 7. NI-VISA Driver Installation Question 12 ADS79xxEVM and ADS79xxEVM-PDK SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated ADS7953EVM-PDK Kit Operation www.ti.com Figure 8. NI-VISA Driver Installing Figure 9. NI-VISA Driver Complete Installation SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback ADS79xxEVM and ADS79xxEVM-PDK Copyright © 2009–2011, Texas Instruments Incorporated 13 ADS7953EVM-PDK Kit Operation www.ti.com This procedure should complete the installation of the NI-VISA drivers. Verify the proper installation by opening the Device Manager and locating as shown in Figure 10. Figure 10. NI-VISA Driver Verification Using Device Manager Once ADCPro is installed, install the ADS7953EVM-PDK software to allow ADCPro to recognize the evaluation board. 7.4.2 USBStyx Driver Installation Start the software by selecting ADCPro from the Windows Start menu. The screen in Figure 11 appears. Figure 11. ADCPro Software Start-up Display Window 1. Select ADS7953EVM from the EVM drop-down menu. The ADS7953EVM-PDK plugin appears in the left pane, as shown in Figure 12. 14 ADS79xxEVM and ADS79xxEVM-PDK SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated ADS7953EVM-PDK Kit Operation www.ti.com Figure 12. ADS7953EVM-PDK Plug-In Display Window 2. The ADS7953EVM-PDK plug-in window has a status area at the top of the screen. When the plug-in is first loaded, the plug-in searches for the board. The user will see a series of messages in the status area indicating this action. 3. If the operating system drivers have not been loaded, Windows will display the Windows Install New Driver Wizard sequence (illustrated in Figure 13 through Figure 17). Accept the default settings. • NOTE: During the driver installation, a message may appear indicating the firmware load has TIMED OUT. Click OK and continue driver installation. The plug-in will attempt to download the firmware again once the driver installation completes. SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback ADS79xxEVM and ADS79xxEVM-PDK Copyright © 2009–2011, Texas Instruments Incorporated 15 ADS7953EVM-PDK Kit Operation www.ti.com Figure 13. Install New Driver Wizard Screen 1 Figure 14. Install New Driver Wizard Screen 2 16 ADS79xxEVM and ADS79xxEVM-PDK SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated ADS7953EVM-PDK Kit Operation www.ti.com Figure 15. Install New Driver Wizard Screen 3 Figure 16. Install New Driver Wizard Screen 4 SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback ADS79xxEVM and ADS79xxEVM-PDK Copyright © 2009–2011, Texas Instruments Incorporated 17 ADS7953EVM-PDK Kit Operation www.ti.com Figure 17. Install New Driver Wizard Screen 5 4. Once Windows finishes installing the software driver, the plug-in downloads the firmware to the MMB0. The status area will display Connected to EVM when the device is connected and ready to use. If the firmware does not load properly, try resetting the MMB0 by pressing reset and then reloading the plug-in. 5. Verify the proper installation of the USBStyx driver using the Device Manager. Note that the first driver item, NI-VISA USB Devices, will disappear and a new item, LibUSB-Win32 Devices will appear, as Figure 18 shows. Figure 18. USBSytx Driver Verification Using Device Manager The driver installation wizard sequence should not appear again, unless the board is connected to a different USB port. 18 ADS79xxEVM and ADS79xxEVM-PDK SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated Evaluating Performance with the ADCPro Software www.ti.com 8 Evaluating Performance with the ADCPro Software The evaluation software is based on ADCPro, a program that operates using a variety of plug-ins. (The ADS7953EVM plug-in is installed as described in the previous section.) To use ADCPro, load an EVM plug-in and a test plug-in. To load an EVM plug-in, select it from the EVM menu. To load a test plug-in, select it from the Test menu. To unload a plug-in, select the Unload option from the corresponding menu. Only one of each kind of plug-in can be loaded at a time. If selecting a different plugin, the previous plugin is unloaded. 8.1 Using the ADS7953EVM-PDK Plug-in The ADS7953EVM-PDK plug-in for ADCPro provides complete control over all settings of the ADS7953. It consists of a tabbed interface (see Figure 19), with different functions available on different tabs. These controls are described in this section. The user can adjust the ADS7953EVM settings when not acquiring data. During acquisition, all controls are disabled and settings may not be changed. When a setting is changed on the ADS7953EVM plug-in, the setting immediately updates on the board. Settings on the ADS7953EVM correspond to settings described in the ADS7953 product data sheet; see the ADS7953 data sheet for details. Because the effective sampling rate of the ADS7953 depends upon settings of the Clock Freq and the number of channels being sampled, the Sampling Rate indicator in the upper right corner of the plug-in interface is always visible and updates whenever a setting changes that affects the effective 'per-channel' sampling rate. SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback ADS79xxEVM and ADS79xxEVM-PDK Copyright © 2009–2011, Texas Instruments Incorporated 19 Evaluating Performance with the ADCPro Software 8.1.1 www.ti.com Channel Tab The ADS7953 can acquire from one to sixteen channels sequentially or in a user defined pattern. The Channel Tab (as shown in Figure 19) provides the control to turn each channel on or off. By default, manual channel mode is enabled. In manual mode, any single channel may be selected for conversion. Figure 19. Channel Enable 20 ADS79xxEVM and ADS79xxEVM-PDK SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated Evaluating Performance with the ADCPro Software www.ti.com In addition, the Manual Control button (shown in Figure 20) can be used to enable or disable auto scan modes 1 and 2. Auto 1 Mode allows the selection of any number of channels from the channel selection list. Auto 2 Mode allows the selection of the highest channel to convert. All channels below this will be converted once this selection is made by pressing the 'Accept Selection' button. Figure 20. Manual Channel Control SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback ADS79xxEVM and ADS79xxEVM-PDK Copyright © 2009–2011, Texas Instruments Incorporated 21 Evaluating Performance with the ADCPro Software 8.1.2 www.ti.com Other Tab The ADS7953 requires a clock to operate. The maximum frequency is selected by default for the different operating modes, providing the maximum 1MSPS throughput rate specified in the datasheet. The clock setting can be modified in this tab by accepting the default SPI or clock stop mode, a continuous clock mode with the fastest possible serial clock, or a continuous clock mode with a variable frequency. The analog input range can also be specified in this tab as well as the contents of the four MSBs of channel data (GPIO status or Channel Address of the conversion results). Figure 21. Serial Clock, Input Range and MS Nibble settings 22 ADS79xxEVM and ADS79xxEVM-PDK SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated Evaluating Performance with the ADCPro Software www.ti.com 8.1.3 Alarm Tab The ADS7953 offers configurable alarm outputs for both high and low alarm selections. The configuration of the alarm function takes place in two steps, the first of which is the setting of the alarm limits. In the Alarm Tab, the hex values for high and low limits are entered for each channel requiring the alarm function. To enable the alarm functions, the GPIO Function tab must be considered next. Figure 22. High and Low Alarm Limits by Channel SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback ADS79xxEVM and ADS79xxEVM-PDK Copyright © 2009–2011, Texas Instruments Incorporated 23 Evaluating Performance with the ADCPro Software 8.1.4 www.ti.com GPIO Function Tab The GPIO0, GPIO1, GPIO2 and GPIO3 pins on the ADS7953 can function as simple general purpose inputs/outputs or as specialized control and monitor functions. The alarm function described in the previous section is processed by GPIO0 and GPIO1. Refer to the data sheet for specific details on GPIO0 and GPIO1 options. GPIO2 can be used to configure the input range of the ADS7953 (2.5V max or 5.0V max), and GPIO3 can be used as a power down input pin. Figure 23. GPIO and System Monitor Control options 24 ADS79xxEVM and ADS79xxEVM-PDK SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated Evaluating Performance with the ADCPro Software www.ti.com 8.1.5 GPIO Tab The GPIO Tab provides a means to monitor and control GPIO functions. If a GPIO is selected in the GPIO Function tab to perform a specialized function, it will appear 'grayed out' in the GPIO tab. For pins configured as GP outputs, a push button will enable the user to set the desired output state. GP Inputs are monitored with an LED display (bright green = logic high). Figure 24. GPIO selection, controls and indicators SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback ADS79xxEVM and ADS79xxEVM-PDK Copyright © 2009–2011, Texas Instruments Incorporated 25 Schematic and Bill of Materials 8.1.6 www.ti.com Collecting Data Once the user has configured the ADS7953 for the test scenario, press the ADCPro Acquire button to start the collection of the number of datapoints specified in the Test plug-in Block Size control. The ADS7953EVM-PDK plug-in disables all the front panel controls while acquiring, and displays a progress bar as shown in Figure 25. Figure 25. Progress Bar While Collecting Data For more information on testing analog-to-digital converters in general and using ADCPro and Test plug-ins, refer to the ADCPro Analog-to-Digital Converter Evalutation Software Users Guide. 8.2 Troubleshooting If ADCPro stops responding while the ADS7953EVM-PDK is connected, try unplugging the power supply from the PDK. Unload and reload the plug-in before reapplying power to the PDK. 9 Schematic and Bill of Materials Complete schematics for the ADS7953EVM are appended to this user guide. The bill of materials is provided in Table 7. Gerber files are available on request. Please e-mail [email protected] and ask for details on how to receive the files. 26 ADS79xxEVM and ADS79xxEVM-PDK SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated AGND J1 2 4 6 8 10 12 14 16 10 8 6 4 2 9 7 5 3 1 VCC_D 12 Copyright © 2009–2011, Texas Instruments Incorporated 10uF C31 8X2X.1 1 3 5 7 9 11 13 15 14 16 15 11 18 17 13 20 19 P1 W6 REF- CH1 CH7 CH6 CH5 CH4 CH3 CH2 CH8 CH9 CH10 CH11 CH12 CH13 CH14 CH15 REF+ CH0 9 7 5 3 1 SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback 10 8 6 4 2 P3B 10 R22 GND 10uF C17 AGND TP3 33 R6 33 R7 33 R8 33 R9 33 R10 W1 Ch2_FLT C9 Ch5_FLT 270pF C8 270pF Ch4_FLT 270pF C10 Ch3_FLT 270pF C11 +VCC AGND AGND AGND AGND AGND Ch1_FLT C12 270pF 2 3 GND +In -In C15 C28 6 1.0uF U1 OPA365 Output 0 +VCC NI R12 7 4 R11 NI CH8 CH9 CH10 CH11 CH12 CH13 CH14 CH15 33 R3 33 R2 33 R1 33 R21 33 R20 33 R19 33 R18 33 R17 W4 CH0 AGND AGND AGND AGND AGND AGND AGND 270pF C22 C2 270pF C5 270pF C4 270pF C3 270pF C24 270pF C14 270pF C13 270pF REF_P REF_M Ch0_FLT 270pF C1 AGND AGND 33 R13 C27 10uF C23 0.1uF +VCC 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 VCC_D R25 47.5K +VCC AGND ADS79XX AGND Ch8 Ch9 Ch10 Ch11 NC/Ch12 NC/Ch13 NC/Ch14 NC/Ch15 AGND 3 1 2 J2 4 1.0uF C29 AGND/AINM AINP MXD AGND +VA REFP AGND/REFM GPIO3 GPIO2 U2 R26 47.5K 4 2 REF5025 GND Vin U3 AGND Ch7 Ch6 Ch5 Ch4 Ch3 Ch2 Ch1 Ch0 VCC VEE CS SCLK SDI SDO BDGND +VBD GPIO0 GPIO1 Temp NC NC NC Trim Vo 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 3 1 7 8 5 6 Ch5_FLT Ch4_FLT Ch3_FLT Ch2_FLT Ch1_FLT Ch0_FLT CS* SCLK SDI SDO TP1 1.0uF C30 10uF C26 VREF+ 270pF AGND C6 33 R4 270pF AGND C7 33 10uF R5 +VCC VCC_D W7 C21 AGND 0.1uF C16 0.1uF C25 TP2 CH7 CH6 W5 R16 33 INT SDO SDI FSX 19 17 15 13 11 9 7 5 3 1 P2 REF_M REF_P C19 0.1uF R23 33 VCC_D 33 R14 33 R15 CLKX W3 REF- VREF+ REF+ AGND 1.0uF 10uF C18 W2 MCP_24LC256 8 5 6 4 VCC_D DGND A0 VCC A1 SDA A2 SCL WP GND U4 C20 1 2 3 7 NI R24 20 18 16 14 12 10 8 6 4 2 www.ti.com Schematic and Bill of Materials Figure 26. ADS7953EVM Schematic ADS79xxEVM and ADS79xxEVM-PDK 27 Schematic and Bill of Materials 9.1 www.ti.com Bill of Materials Note: All components should be compliant with the European Union Restriction on Use of Hazardous Substances (RoHS) Directive. Some part numbers may be either leaded or RoHS. Verify that purchased components are RoHS-compliant. (For more information about TI's position on RoHS compliance, see the TI website.) Table 7. ADS7953EVM Bill of Materials 28 Item No. Qty Ref Des 1 1 N/A Printed Wiring Board Description 2 0 C15 Not Installed Not Installed Vendor Part Number TI 3 0 R11 R14 R24 4 16 C1 - C14 C22 C24 CAP CER 270PF 50V C0G 5% 0603 TDK C1608C0G1H271J 5 4 C16 C19 C23 C25 CAP CER 0.10UF 25V X7R 10% 0603 TDK C1608X7R1E104K 6 6 C17 C18 C21 C26 C27 CAP CERAMIC 10UF 6.3V X5R 0603 Panasonic 7 4 C20 C28 C29 C30 CAP CER 1.0UF 16V X7R 0603 Taiyo Yuden 8 1 J1 8X2X.1 Header Samtec TMS-108-02-G-D 9 1 J2 2X2X.1 Header Samtec TMS-102-02-G-S 10 2 P1 P2 (top side) 10 Pin, Dual Row, SMT Header (20 P Samtec TSM-110-01-T-DVP 11 2 P1B P2B (bottom side) 10 Pin, Dual Row, SMT Socket (20 P Samtec SSW-110-22-F-DVS-K 12 1 P3 (top side) 5 Pin, Dual Row, SMT Header (10 Po Samtec TSM-105-01-T-DVP 13 1 P3B (bottom side) 5 Pin, Dual Row, SMT Socket (10 Po Samtec SSW-105-22-F-DVS-K 14 19 Yageo RC0603FR-0733RL 15 1 R12 RES 0.0 OHM 1/10W 5% 0603 SMD Yageo RC0603JR-070RL 16 1 R22 RES 10.0 OHM 1/10W 1% 0603 SMD Yageo RC0603FR-0710RL 17 2 R25 R26 RES 47.5K OHM 1/10W 1% 0603 SMD Yageo RC0603FR0747K5L 18 3 TP1 TP2 TP3 TEST POINT PC MINI .040D RED Keystone 5001 19 2 GND GND TEST POINT PC MULTI PURPOSE BLK Keystone 5011 20 1 U1 2.2V, 50MHz, Low-Noise, Single-Sup TI OPA365AID 21 1 U2 12/10/8-Bit, 1 MSPS, 16/12/8/4-Cha TI ADS7953/52/51/50 22 1 U3 Low-Noise, Very Low Drift, Precisi TI REF5025ID 23 1 U4 IC SERIAL EEPROM 256K 2.5V 8-SOIC Microchip ADS79xxEVM and ADS79xxEVM-PDK R1 - R10 R13 R15 - RES 33.0 OHM 1/10W 1% 0603 SMD ECJ-1VB0J106M EMK107B7105KA-T 24LC256T-I/SN SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated Revision History www.ti.com Table 7. ADS7953EVM Bill of Materials (continued) Item No. Qty Ref Des 24 0 W1 25 6 W2 - W7 Vendor Part Number Not Installed Description Samtec TMS-102-02-G-S 3 Pin , 2mm Header Samtec TMM-103-01-T-S Revision History Changes from B Revision (March, 2011) to C Revision ................................................................................................. Page • Updated Table 5 .......................................................................................................................... 6 NOTE: Page numbers for previous revisions may differ from page numbers in the current version. SLAU262C – January 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated Revision History 29 1 2 3 4 6 5 Revision History REV W1 Approved C15 R11 NI AGND ECN Number NI R12 VCC_D 0 +VCC CH0 R25 47.5K R26 47.5K C28 D W4 7 P1 20 17 18 15 16 13 14 11 9 8 5 6 3 4 1 2 3 R10 CH1 Ch0_FLT +In 1 C22 270pF U1 OPA365 2 270pF R9 Ch2_FLT 33 CH5 REF_M 3 REF_P 4 C11 270pF CH6 C27 5 +VCC AGND 6 10uF R8 CH7 C23 Ch3_FLT 33 7 0.1uF C10 8 270pF AGND 9 R7 C Ch4_FLT 33 CH15 10 C9 CH15 270pF CH14 1 3 5 7 9 11 13 15 2 4 6 8 10 12 14 16 Ch5_FLT 33 CH12 11 C1 12 270pF R6 CH13 R17 33 AGND J1 AGND C8 CH14 270pF CH11 13 R18 14 33 AGND C2 15 270pF CH10 AGND CH9 CH13 8X2X.1 AGND TP2 U2 1 AGND CH4 TP1 4 J2 C12 CH3 2 3 6 AGND Ch1_FLT 33 CH2 10 7 Output CH0 D R13 33 -In REF+ 12 1.0uF 4 19 2 REF- R19 17 33 CH8 16 C13 18 270pF AGND CH12 19 R20 W7 GPIO2 GPIO1 GPIO3 GPIO0 AGND/REFM +VBD REFP BDGND +VA SDO AGND SDI MXD SCLK AINP CS AGND/AINM VEE AGND VCC NC/Ch15 Ch0 NC/Ch14 Ch1 NC/Ch13 Ch2 NC/Ch12 Ch3 Ch11 Ch4 Ch10 Ch5 Ch9 Ch6 Ch8 Ch7 AGND AGND 38 37 36 VCC_D C25 35 34 SDO 33 SDI 32 SCLK 31 CS* 0.1uF 33 W5 30 29 Ch0_FLT C16 C21 27 Ch1_FLT 0.1uF 10uF 26 Ch2_FLT 25 Ch3_FLT 24 Ch4_FLT 23 Ch5_FLT FSX 33 SDI SDO AGND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 CH6 C7 33 21 VCC_D VCC_D 270pF AGND 20 R24 NI C14 U4 R4 CH7 C19 0.1uF R23 33 C6 33 270pF AGND R21 33 C DGND R5 22 270pF 1 2 3 7 A0 A1 A2 WP 8 5 6 4 VCC SDA SCL GND MCP_24LC256 C24 B 270pF TP3 AGND R22 10 33 INT AGND B R15 R14 +VCC 28 CLKX ADS79XX 33 CH11 P2 R16 +VCC CH10 C17 R1 33 C3 10uF 270pF REF+ AGND CH9 R2 33 C4 2 +VCC 9 7 5 3 1 C31 10uF 6 VREF+ P3B CH8 GND GND C20 C18 10uF 1.0uF R3 33 REF_P C26 AGND 10 8 6 4 2 W6 Vo Vin C29 270pF VCC_D W2 U3 Trim 1.0uF 10uF 5 C30 C5 270pF AGND 4 GND Temp NC NC NC 3 1 7 8 REF_M VREF+ REFW3 1.0uF AGND REF5025 AGND ti A A 12500 TI Boulevard. Dallas, Texas 75243 Title: Engineer: Tom Hendrick Drawn By: FILE: 1 2 3 4 5 ADS79xx Evaluation Module DOCUMENTCONTROL # REV: 6503756 Lisa Parker ADS795x_A.sch DATE: 17-Nov-2008 SIZE: 6 SHEET: 1 OF: 1 1 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. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. 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