Texas Instruments ADS1178EVM User manual

User's GuideSBAU129C – November 2007 – Revised July 2008
ADS1178EVM, ADS1278EVM, ADS1178EVM-PDK, andADS1278EVM-PDK
ADS1178EVM (Left) and ADS1178EVM-PDK (Right)
This user's guide describes the characteristics, operation, and use of the ADS1178EVM andADS1278EVM, both by themselves and as part of the ADS1178EVM-PDK or ADS1278EVM-PDK. Theseevaluation modules (EVMs) are evaluation boards for the ADS1278 , a 24-bit multi-channel, delta-sigmaanalog-to-digital converter (ADC), and the ADS1178 , a 16-bit version of the ADS1278. The EVM allowsevaluation of all aspects of the ADS1178 or ADS1278 device. Complete circuit descriptions, schematicdiagrams, and bills of material are included in this document.
The following related documents are available through the Texas Instruments web site athttp://www.ti.com .
EVM-Compatible Device Data Sheets
Device Literature Number Device Literature Number
ADS1278 SBAS367A OPA1632 SBOS286AREF5025 SBOS410 SN74LVC2G157 SCES207KREF3125 SBVS046C TPS73018 SBVS054HOPA2350 SBOS099C TPS65131 SLVS493BADS1178 SBAS373A PCA9535 SCPS129H
ADCPro is a trademark of Texas Instruments.Microsoft, Windows are registered trademarks of Microsoft Corporation.I
2
C is a trademark of NXP Semiconductors, Inc.All other trademarks are the property of their respective owners.
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Contents1 EVM Overview ............................................................................................................... 42 Analog Interface .............................................................................................................. 43 Digital Interface .............................................................................................................. 54 Power Supplies .............................................................................................................. 75 Voltage Reference ........................................................................................................... 86 Power-Down, Mode, and Format Control ................................................................................. 97 Clock Source ................................................................................................................. 98 EVM Operation ............................................................................................................. 109 ADS1278EVM-PDK Kit Operation ....................................................................................... 1410 Evaluating Performance with the ADCPro Software ................................................................... 2711 Schematics and Layout .................................................................................................... 32
List of Figures
1 Connector J2 ................................................................................................................. 72 Connectors J15, J16 ........................................................................................................ 83 Connector J1 ................................................................................................................. 84 Switch S1 ..................................................................................................................... 95 Jumper J19 .................................................................................................................. 106 Amplifier Selection Switches .............................................................................................. 117 ADS1278EVM Default Jumper Locations ............................................................................... 138 MMB0 Initial Setup ........................................................................................................ 159 Connecting ADS1278EVM to MMB0 ................................................................................... 1610 Connecting an AC Adapter ............................................................................................... 1711 Laboratory Power-Supply Connection ................................................................................... 1812 NI-VISA Driver Installation ................................................................................................ 1913 NI-VISA Driver Installation Question ..................................................................................... 2014 NI-VISA Driver Installing ................................................................................................... 2015 NI-VISA Driver Complete Installation .................................................................................... 2116 NI-VISA Driver Verification Using Device Manager .................................................................... 2117 ADCPro Software Start-up Display Window ............................................................................ 2218 ADS1278EVM-PDK Plug-In Display Window........................................................................... 2319 Install New Driver Wizard Screen 1 ...................................................................................... 2420 Install New Driver Wizard Screen 2 ...................................................................................... 2421 Install New Driver Wizard Screen 3 ...................................................................................... 2522 Install New Driver Wizard Screen 4 ...................................................................................... 2523 Install New Driver Wizard Screen 5 ...................................................................................... 2624 USBSytx Driver Verification Using Device Manager ................................................................... 2625 Channel Enable............................................................................................................. 2726 Manual Channel Control ................................................................................................... 2827 Clock Settings and Mode .................................................................................................. 2928 Operating Mode ............................................................................................................ 3029 Output Data Format ........................................................................................................ 3030 Progress Bar While Collecting Data ..................................................................................... 31
List of Tables
1 J9/J7: Analog Interface Pinout ............................................................................................. 52 J8: Supplemental Analog Interface Pinout ............................................................................... 53 J5: Serial Interface Pins ..................................................................................................... 64 J3 Configuration: Power-Supply Input .................................................................................... 75 J15 +10V Selection .......................................................................................................... 86 J16 –10V Selection .......................................................................................................... 87 List of Switches ............................................................................................................. 13
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8 Operating Modes: Clock Frequency ..................................................................................... 289 ADS1278EVM Bill of Materials ........................................................................................... 32
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1 EVM Overview
1.1 Features
1.2 Introduction
2 Analog Interface
EVM Overview www.ti.com
ADS1178EVM/ADS1278EVM Features:•Contains all support circuitry needed for the ADS1178/ADS1278•+10V and –10V generated from the +5V supply or supplied externally•Voltage reference options: external or onboard•Clock options: External clock source or 27MHz onboard crystal oscillator•GPIO access•Compatible with the TI Modular EVM System
ADS1178EVM-PDK/ADS1278EVM-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 ADS1178EVM-PDK or ADS1278EVM-PDK is available. This kit combinesthe ADS1178EVM/ADS1278EVM board with the DSP-based MMB0 motherboard, and includes ADCPro™software for evaluation.
The MMB0 motherboard allows the ADS1178EVM/ADS1278EVM to be connected to the computer via anavailable USB port. This manual shows how to use the MMB0 as part of theADS1178EVM-PDK/ADS1278EVM-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 basedon a number of plug-in programs, so it can be expanded easily with new test and data collection plug-ins.The ADS1178EVM-PDK/ADS1278EVM-PDK is controlled by a plug-in running in ADCPro. For moreinformation about ADCPro, see the ADCPro™ Analog-to-Digital Converter Evalutation Software User'sGuide (http://focus.ti.com/lit/ug/sbau128/sbau128.pdf ), available for download for the TI web site.
This manual covers the operation of both the ADS1178EVM/ADS1278EVM and theADS1178EVM-PDK/ADS1278EVM-PDK. Throughout this document, the abbreviation EVM and the termevaluation module are synonymous with the ADS1178EVM/ADS1278EVM. For clarity of reading, thismanual will refer only to the ADS1278EVM or ADS1278EVM-PDK, but operation of the EVM and kit forthe ADS1178 is identical, unless otherwise noted.
The ADS1278EVM is an evaluation module built to the TI Modular EVM System specification. It can beconnected to any modular EVM system interface card.
The ADS1278EVM is available as a stand-alone printed circuit board (PCB) or as part of theADS1278EVM-PDK, which includes an MMB0 motherboard and software. As a stand-alone PCB, theADS1278EVM is useful for prototyping designs and firmware.
Note that the ADS1278EVM has no microprocessor and cannot run software. To connect it to a computer,some type of interface is required.
For maximum flexibility, the ADS1278EVM 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 J9. This header/socket provides access to the analog input pins ofthe ADS1278. Consult Samtec at http://www.samtec.com or call 1-800-SAMTEC-9 for a variety of matingconnector options. These signals can also be connected to the terminal block J7.
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3 Digital Interface
3.1 Serial Data Interface
www.ti.com Digital Interface
In addition to J9 (and J7), terminal block J8 also provides additional analog inputs to accommodate thelarge number of input channels available on the ADS1278.
Most of the pins on J7, J8 and J9 are directly connected, with no filtering or protection. Use appropriatecaution when handling these pins. Table 1 and Table 2 summarize the pinouts for analog interfaces J9/J7and J8, respectively.
Table 1. J9/J7: Analog Interface Pinout
Pin Number Signal Description
J9.1, J7-2 A1N AINN1, ADS1278J9.2, J7-3 A1P AINP1, ADS1278J9.3, J7-4 A2N AINN2, ADS1278J9.4, J7-5 A2P AINP2, ADS1278J9.5, J7-6 A3N AINN3, ADS1278J9.6, J7-7 A3P AINP3, ADS1278J9.7, J7-8 A4N AINN4, ADS1278J9.8, J7-9 A4P AINP4, ADS1278J9.18 EXTREFN External Reference source input (– side ofdifferential input)J9.20 EXTREFP External Reference source input (+ side ofdifferential input)J9.10-16 (even) Unused —J9.15 Unused —J9.9-19 (odd), J7-1 AGND Analog ground connections (except J1.15)
Table 2. J8: Supplemental Analog Interface Pinout
Pin Number Signal Description
J8.1 GND Analog groundJ8.2 A5N AIN5N, ADS1278J8.3 A5P AIN5P, ADS1278J8.4 A6N AIN6N, ADS1278J8.5 A6P AIN6P, ADS1278J8.6 A7N AIN7N, ADS1278J8.7 A7P AIN7P, ADS1278J8.8 A8N AIN8N, ADS1278J8.9 A8P AIN8P, ADS1278
The ADS1278EVM is designed to easily interface with multiple control platforms. Samtec part numbersSSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual-row, header/socketcombination at J5. This header/socket provides access to the digital control and serial data pins of theADC. Consult Samtec at http://www.samtec.com or call 1-800-SAMTEC-9 for a variety of matingconnector options.
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3.2 Data Output
Digital Interface www.ti.com
All logic levels on J5 are 3.3V CMOS, except for the I
2
C™ pins. These pins conform to 3.3V I
2
C rules.Table 3 describes the J5 serial interface pins.
Table 3. J5: Serial Interface Pins
Pin No. Pin Name Signal Name I/O Type Pullup Function
J5.1 CNTL SYNC In High —J5.2 GPIO0 MODE0 In High —J5.3 CLKX SCLK In None ADS1278 SPI clockJ5.4 DGND DGND In/Out None Digital groundJ5.5 CLKR CLKR Out None SCLK clockJ5.6 GPIO1 MODE1 In High —J5.7 FSX DRDY/FSYNC In/Out Low —J5.8 GPIO2 FORMAT0 In High —J5.9 FSR DRDY/FSYNC In/Out None —J5.10 DGND DGND In/Out None Digital groundJ5.11 DX DIN In None ADS1278 SPI datainJ5.12 GPIO3 FORMAT1 In High —J5.13 DR DOUT1 Out None ADS1278 data outJ5.14 GPIO4 FORMAT2 In None —J5.15 /INT DRDY/FSYNC Out None —J5.16 SCL SCL I
2
C N/A I
2
C clockJ5.17 TOUT CLK In None Can be used toprovide a clock froma processorJ5.18 DGND DGND In/Out None Digital groundJ5.19 GPIO5 CLK Select — None —J5.20 SDA SDA I
2
C N/A I
2
C data
Many pins on J5 have weak pull-up/down resistors. These resistors provide default settings for many ofthe control pins. Many pins on J5 correspond directly to ADS1278 pins. See the ADS1278 product datasheet for complete details on these pins.
Most data communications are directed through DOUT1. The data from all eight channels can beobserved on the DOUT1 pin using the TDM mode. That is the signal that is used by theADS1278EVM-PDK to read back and display all the channels. All the data output signals (DOUT1 toDOUT8) can be monitored on J2. Figure 1 illustrates the pinout for J2.
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4 Power Supplies
4.1 Bipolar Power Options
www.ti.com Power Supplies
Figure 1. Connector J2
J3 is the power-supply input connector. Table 4 lists the configuration details for J3. Analog inputs to theADC can be applied directly to the device (see Section 8.1 ,Analog Input), bypassing the onboardamplifiers, and in this case only +5V and +3.3V are required to power the EVM. If the amplifiers are used,an additional bipolar supply is needed to power them. The EVM includes a switching power supply togenerate a +10V and –10V supply. For optimum noise performance, the external supplies (+VA and –VA)should be used.
Table 4. J3 Configuration: Power-Supply Input
Pin No. Pin Name Function Required
J3.1 +VA +10V to +15V Yes, unless onboard +10V isused.J3.2 –VA -10V to –15V Yes, unless onboard –10V isused.J3.3 +5VA +5V analog supply AlwaysJ3.4 –5VA –5V analog supply NoJ3.5 DGND Digital ground input YesJ3.6 AGND Analog ground input YesJ3.7 +1.8VD 1.8V digital supply NoJ3.8 +3.3VD 3.3V digital supply AlwaysJ3.9 VD1 Not used NoJ3.10 +5VD +5V Used to generate +10V/–10V
The 1.8V for DVDD comes from the voltage regulator U16 using 3.3V as the source voltage input.
All of the power supplies AVDD (+5V), DVDD (1.8V), and IOVDD (3.3V) have corresponding jumpers J10,J11 (AVDD), J13 (DVDD) and J14 (IOVDD) that can be replaced with a current meter to measure therespective supply currents.
J15 and J16 require a jumper to select the voltage used by the onboard amplifiers. The external voltagescan range from 10V to 15V. The onboard voltage is always 10V. Table 5 and Table 6 list the options forJ15 and J16, respectively. Figure 2 shows the pinout for connectors J15 and J16.
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5 Voltage Reference
Voltage Reference www.ti.com
Table 5. J15 +10V Selection
Jumper Name Function
1-2 (OB) +10V Select the +10V that isgenerated on the EVM2-3 (EXT) +VA Select the external +VA voltage
Table 6. J16 –10V Selection
Jumper Name Function
1-2 –10V Select the –10V that is generatedon the EVM2-3 –VA Select the external –VA voltage
Figure 2. Connectors J15, J16
The ADS1278EVM has three sources for the reference voltage. Jumper J1 can select the voltage fromeither the REF3125 (U1) or REF5025 (U2). The reference from either source is filtered and buffered byU3A. Switch S1 chooses either the onboard reference or the external reference voltage that is connectedto the reference pins of J9. Figure 3 illustrates the pinout for connector J1. Figure 4 shows switch S1 as itappears on the EVM.
Figure 3. Connector J1
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6 Power-Down, Mode, and Format Control
7 Clock Source
www.ti.com Power-Down, Mode, and Format Control
Figure 4. Switch S1
The ADS1278 has several pins to control the power-down of individual channels, and mode and format forthe digital interface. These pins are controlled on the EVM either through software or hardware (usingswitches S10 and S11).
For users of the ADS1278EVM as a stand-alone module, these pins may be pulled high or low throughDIP switches S10 and S11. Refer to the ADS1278 product data sheet for complete details on these pinsand which state sets which options.
For use in the ADS1278EVM-PDK, the state of these pins is controlled by software, using the I
2
C portexpander on the EVM. When used in the ADS1278EVM-PDK, the DIP switches S10 and S11 must all beswitched so that they are down, toward the center of the board. The ADS1278EVM-PDK software willcheck at startup to verify that these switches are set correctly, and will generate an error message if theyare not. However, it cannot detect if the switches are changed after startup.
CAUTION
When using the EVM as part of the ADS1278EVM-PDK, the DIP switches S10and S11 must all be switched so that they are down, toward the center of theboard. Failure to do so may damage the EVM.
The ADS1278 clock can come from one of several sources: the onboard 27MHz crystal oscillator, a clocksupplied by a processor on the TOUT pin (J5.17), or an external clock source connected to J18.1 (ground)and J18.2 (signal).
If the onboard 27MHz oscillator is selected, the device can be run in the high-speed mode, thehigh-resolution mode, the low-power mode, or low-speed modes with CLKDIV set to 1. If the performanceof the device must be explored with CLKDIV set to 0 in the low-power and low-speed modes, an externalclock must be provided to the board, either using the TOUT connection or having an external clock sourceconnected to J18. The same condition is true if frequencies other than the 27MHz provided by theonboard oscillator must be investigated.
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7.1 Usage in PDK
7.2 Usage as a Stand-Alone EVM
8 EVM Operation
8.1 Analog Input
EVM Operation www.ti.com
If using the ADS1278EVM as part of the ADS1278EVM-PDK, J19 should not have any pins shorted.Remove any shorting blocks on jumper J19. The ADS1278EVM-PDK software will allow selection of theclock source under software control (this is accomplished by using port 05 of the I
2
C expander U17). Thesoftware allows selection of the onboard 27MHz oscillator, or a clock provided by a PLL on the MMB0 thatdirectly drives the appropriate CLK pins of the interface, or an external, customer-supplied clock. If anexternal clock is selected with the software, this clock must be provided on J18. Note that if the externalclock is selected and no clock is provided, the software may hang waiting for data from the converter.
If using the EVM in your own system and not with the PDK hardware and software, observe the followingrecommendations:
•J17 should be removed if the external clock source is used and the TOUT pin is still driven by aprocessor in order to avoid conflicts.•Jumper J19 can be used to always select the 27MHz crystal (IOVDD position) or allow theonboard/external clock selection to be controlled by GPIO5 (J5.19), as shown in Figure 5 .
Figure 5. Jumper J19
The following section provides information on the analog input, digital control, and general operatingconditions of the ADS1278EVM.
Four of the analog input sources (channels 1–4) can be applied directly to J9 (top or bottom side) orthrough signal-conditioning modules available for the the modular EVM system. Terminal block J7 isconnected in parallel with the analog signal connections to J9. The additional four channel sources (5-8)can be applied to the terminal block J8.
Each input signal can be selected to connect directly to the analog inputs of the ADS1278 or they can usethe OPA1632 buffers that are provided. Switches S2–9 can be switched away from the ADS1278 to selectthe Terminal Block (TBK) or towards the ADS1278 to select the Amplifier (AMP) for the analog inputs 1through 8, as shown in Figure 6 .
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8.2 Digital Control
www.ti.com EVM Operation
Figure 6. Amplifier Selection Switches
The digital control signals can be applied directly to J5 (top or bottom side). The modular ADS1278EVMcan also be connected directly to a DSP or microcontroller interface board, such as the 5-6KINTERFACEor HPA-MCUINTERFACE boards available from Texas Instruments, or the MMB0 if purchased as part ofthe ADS1278EVM-PDK. For a list of compatible interface and/or accessory boards for the EVM or theADS1278, see the relevant product folder on the TI web site. Some of the digital signals are controlleddirectly with pins on J5. Other signals such as the Power Down controls can only be controlled with slideswitches or by U17 and U18 that are set up and read using the I
2
C signals on pins 16 and 18 of J5. TheFormat and Mode pins can be controlled by all three methods (slide switches, GPIO pins on J5, and theI
2
C control from U17).
The ADS1278 allows the serial interface to be used in two different formats: an SPI-compatible mode anda frame-sync format. Switch S12 can be used to switch between these two formats. The left position,marked SPI, selects the SPI format. In this format, the signals are connected in this configuration:
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8.3 ADS1278EVM-PDK Power Supply
EVM Operation www.ti.com
•The SCLK input of the converter is driven by the serial port signal CLKX, pin J5.3.•The signal from the selected source for the clock (see Section 7 ,Clock Source) is connected to theCLKR pin (J5.5) allowing the serial port of a processor to be synchronized to the converters masterclock.
•The signal from the selected clock source is routed to the CLK input of the converter.•Port P10 of the I2C port expander U18 is connected to a logic high level, so that the position of switchS12 can be read back by software.
The right position of S12, marked FS, selects the frame-sync format. In this format, the signals areconnected in this configuration:•The SCLK input of the converter is driven by the serial port signal CLKR, pin J5.5.•The signal from the selected clock source is connected to the CLKX pin (J5.3), allowing the serial portof a processor to be synchronized to the converter's master clock.•The CLK input of the converter is driven by the CLKR signal (J5.5). This ensures that the CLK andSCLK signals have the same phase and the correct ratio as outlined in the data sheet of the device.•Port P10 of the I
2
C port expander U18 is connected to a logic low level, so that the position of switchS12 can be read back by software.
For use in the ADS1278EVM-PDK, S12 must be in the right (FS) position, which is the factory defaultsetting.
Switching to SPI format will allow users to connect the EVM to any SPI-compatible processor notsupporting the frame-sync mode. If this format is selected, please keep in mind that the high-speed modewill not work at full speed (32.768MHz) because of the limitations outlined in the device product datasheet.
The ADS1278EVM can either be powered by an AC adapter or by applying the 5V, +10V, and –10V to theconnectors on the MMB0 board. The MMB0 board will provide the 5V and 3.3V to the ADS1278EVMalong with the +10V and –10V signals. Because the circuitry is provided on the ADS1278EVM to generate+10V and –10V, the complete system can be powered from the supplied AC adapter that supplies +6Vand 3A.
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8.4 Default Jumper Settings and Switch Positions
www.ti.com EVM Operation
Figure 7 shows the jumpers found on the EVM and the respective factory default conditions for each.
Figure 7. ADS1278EVM Default Jumper Locations
Table 7 lists the switches found on the EVM and the respective factory default conditions for each.
Table 7. List of Switches
Switch Default Position Switch Description
S1 Left Onboard referenceS2-S4 Left Ain1-3 terminal block (amplifiersbypassed)S5 Up Ain4 terminal block (amplifiersbypassed)S6 Down Ain5 terminal block (amplifiersbypassed)S7-S9 Left Ain6-8 terminal block (amplifiersbypassed)S12 Right Frame-sync format
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9 ADS1278EVM-PDK Kit Operation
9.1 Installing the ADCPro Software
ADS1278EVM-PDK Kit Operation www.ti.com
This section provides information on using the ADS1278EVM-PDK, including setup, program installation,and program usage.
To prepare to evaluate the ADS1278 with the ADS1278EVM-PDK, complete the following steps:Step 1. Install the ADCPro software (if not already installed) on a PC.Step 2. Install the ADS1278EVM-PDK EVM plug-in software.Step 3. Set up the ADS1278EVM-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.
CAUTION
Do not connect the ADS1278EVM-PDK before installing the software on asuitable PC. Failure to observe this caution may cause Microsoft Windows tonot recognize the ADS1278EVM-PDK.
The latest software is available from the TI website at http://www.ti.com/ . The CD-ROM shipped with theADS1278EVM may not contain the latest software, but the ADCPro installer will check for updates whenexecuted (if connected to the Internet), and then give you the option of downloading and installing thelatest version. Refer to the ADCPro User Guide for instructions on installing and using ADCPro.
To install the ADS1278EVM-PDK plug-in, run the file: ads1278evm-pdk-plug-in-1.1.0.exe (1.1.0 is theversion number, and increments with software version releases - you may have a different version on yourCD). Double-click the file to run it; then follow the instructions shown. You can also utilize the ADCProUpdate Check feature to check for newer versions of the ADS1278EVM-PDK plug-in, once you haveinstalled one version of it.
The software should now be installed, but the USB drivers may not yet have been loaded by the PCoperating system. This step will complete when the ADCPro software is executed; see Section 9.4 ,Running the Software and Completing Driver Installation.
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9.2 Setting Up the ADS1278EVM-PDK
J13
POWER
SUPPLY
CONFIG
S4
BOOT MODE SWITCH
J12
WALL SUPPLY CONNECTION
CONNECT IF NEEDED.
SEE TEXT.
www.ti.com ADS1278EVM-PDK Kit Operation
The ADS1278EVM-PDK contains both the ADS1278EVM and the MMB0 motherboard; however, thedevices are shipped unconnected. Follow these steps to set up the ADS1278EVM-PDK:Step 1. Unpack the ADS1278EVM-PDK kit.Step 2. Set the jumpers and switches on the MMB0 as shown in Figure 8 .•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 throughthe terminal block, disconnect J12. (See Section 9.3 for details on connecting the power supply.)
Figure 8. MMB0 Initial Setup
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ADS1278EVM-PDK Kit Operation www.ti.com
Step 3. Plug the ADS1278EVM into the MMB0, as Figure 9 illustrates.
Figure 9. Connecting ADS1278EVM to MMB0
CAUTION
Do not misalign the pins when plugging the ADS1278EVM into the MMB0.Check the pin alignment carefully before applying power to the PDK.
Step 4. Set the jumpers and switches on the ADS1278EVM as shown in Figure 7 (note that thesesettings are the factory-configured settings for the EVM). Note that the default configurationfor the EVM is to use external ±10V supplies for the input amplifiers.
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9.2.1 About the MMB0
9.3 Connecting the Power Supply
9.3.1 Connecting an AC Adapter
J13
POWER
SUPPLY
CONFIG
J12
WALL SUPPLY CONNECTION
J2
AC ADAPTER INPUT
www.ti.com ADS1278EVM-PDK Kit Operation
The MMB0 is a Modular EVM System motherboard. It is designed around the TMS320VC5507 , a DSPwith an onboard USB interface from Texas Instruments. The MMB0 also has 16MB of SDRAM installed.
The MMB0 is not sold as a DSP development board, and it is not available separately. TI cannot offersupport for the MMB0 except as part of an EVM kit. For schematics or other information about the MMB0,contact Texas Instruments.
The ADS1278EVM-PDK can be operated with a unipolar +5V supply or a combination of +5V and bipolar±(10V to 15V) supply.
When the MMB0 DSP is powered properly, LED D2 glows green. The green light indicates that the 3.3Vsupply for the MMB0 is operating properly. (It does not indicate that the EVM power supplies areoperating properly.)
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 acurrent rating of at least 2A.
Jumper J12 on the MMB0 connects a wall-mounted power supply to the board. To use the wall-mountsupply, J12 must be shorted. Figure 10 illustrates how to connect an AC adapter to the MMB0.
Figure 10. Connecting an AC Adapter
SBAU129C – November 2007 – Revised July 2008 ADS1178EVM, ADS1278EVM, ADS1178EVM-PDK, and ADS1278EVM-PDK 17Submit Documentation Feedback

9.3.2 Connecting a Laboratory Power Supply
J13
POWER
SUPPLY
CONFIG
J14
POWER
INPUT
J12
WALL SUPPLY CONNECTION
GND
+5VDC
(OPTIONAL) 5VDC-
9.4 Running the Software and Completing Driver Installation
ADS1278EVM-PDK Kit Operation www.ti.com
A laboratory power supply can be connected through terminal block J14 on the MMB0, as shown inFigure 11 . Both unipolar and bipolar configurations are supported.
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.
For bipolar mode, also connect a –10V dc supply to the –VA, and +10V on the +VA terminals on J14.
It is not necessary to connect a +5V dc supply voltage to the +5VA terminal on J14 if the +5V/+5VAposition on J13 is shorted.
Figure 11. Laboratory Power-Supply Connection
Note: The software is continually under development. These instructions and screen images arecurrent at the time of this writing, but may not exactly match future releases.
The program for evaluating the ADS1278EVM-PDK is called ADCPro. This program uses plug-ins tocommunicate with the EVM. The ADS1278EVM-PDK plug-in is included in the ADS1278EVM-PDKpackage.
The program currently runs only on Microsoft Windows platforms of Windows XP; Windows Vista is NOTsupported.
If this is the first time installing ADCPro and plug-ins, follow these procedures to run ADCPro andcomplete the necessary driver installation. Make sure the ADCPro software and device plug-in softwareare installed from the CD-ROM as described in Section 9.1 ,Installing the ADCPro Software.
18 ADS1178EVM, ADS1278EVM, ADS1178EVM-PDK, and ADS1278EVM-PDK SBAU129C – November 2007 – Revised July 2008Submit Documentation Feedback

9.4.1 NI-VISA USB Device Driver Installation
www.ti.com ADS1278EVM-PDK Kit Operation
1. After the ADCPro software is installed, apply power to the PDK and connect the board to an availablePC USB port.2. The computer should recognize new hardware and begin installing the drivers for the hardware.Figure 12 through Figure 15 are provided for reference to show the installation steps.•For the first screen, Figure 12 , it is not necessary to search for the software; it has already beeninstalled to your PC.•For the remaining steps, accept the default settings.
Figure 12. NI-VISA Driver Installation
SBAU129C – November 2007 – Revised July 2008 ADS1178EVM, ADS1278EVM, ADS1178EVM-PDK, and ADS1278EVM-PDK 19Submit Documentation Feedback

ADS1278EVM-PDK Kit Operation www.ti.com
Figure 13. NI-VISA Driver Installation Question
Figure 14. NI-VISA Driver Installing
20 ADS1178EVM, ADS1278EVM, ADS1178EVM-PDK, and ADS1278EVM-PDK SBAU129C – November 2007 – Revised July 2008Submit Documentation Feedback