Texas Instruments MSOP-8EVM-PDK User manual

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MSOP-8EVM and MSOP-8EVM-PDK
ADCPro is a trademark of Texas Instruments.
Windows is a registered trademark of Microsoft Corporation.
User's Guide
SBAU140A–December 2008–Revised February 2016
MSOP-8EVM and MSOP-8EVM-PDK
Figure 1. MSOP-8EVM (Left) and MSOP-8EVM-PDK (Right)
This user's guide describes the characteristics, operation, and use of the MSOP-8EVM, both by itself and
as part of the MSOP-8EVM-PDK. This EVM is an evaluation board for single-channel, 14- to 16-bit,
analog-to-digital converter (ADC) devices in an MSOP-8 package. A complete circuit description,
schematic diagram, and bill of materials are included with this document.
This manual covers the operation of both the MSOP-8EVM and the MSOP-8EVM-PDK. It does not
describe the MMB0 motherboard in detail. Throughout this document, the abbreviation EVM and the term
evaluation module are synonymous with the MSOP-8EVM.

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MSOP-8EVM and MSOP-8EVM-PDK
Contents
1 EVM Overview ............................................................................................................... 3
2 Analog Interface.............................................................................................................. 4
3 Digital Interface .............................................................................................................. 4
4 Power Supplies .............................................................................................................. 4
5 EVM Operation............................................................................................................... 7
6 MSOP-8EVM-PDK Kit Operation.......................................................................................... 8
7 Evaluating with the ADCPro Software................................................................................... 18
Appendix A Bill of Materials (BOM) and Schematic......................................................................... 21
List of Figures
1 MSOP-8EVM (Left) and MSOP-8EVM-PDK (Right) .................................................................... 1
2 MMB0 Initial Setup........................................................................................................... 9
3 MSOP-8 EVM Board Initial Setup........................................................................................ 10
4 Connecting the MSOP-8EVM to the MMB0 Motherboard ............................................................ 10
5 Connecting an AC Adapter ............................................................................................... 11
6 Laboratory Power-Supply Connection................................................................................... 12
7 ADCPro Software Start-up Display Window............................................................................ 13
8 ADS8326EVM-PDK Plug-In Display Window........................................................................... 14
9 Found New Hardware Wizard, Screen 1................................................................................ 15
10 Found New Hardware Wizard, Screen 2................................................................................ 15
11 Found New Hardware Wizard, Screen 3................................................................................ 16
12 Found New Hardware Wizard, Screen 4................................................................................ 16
13 Found New Hardware Wizard, Screen 5................................................................................ 17
14 Continuous Clock—Max SCLK........................................................................................... 18
15 Clockstop Mode—Max SCLK............................................................................................. 19
16 Continuous Mode—Stretched SCLK .................................................................................... 19
17 Progress Bar While Collecting Data ..................................................................................... 20
List of Tables
1 Related Documentation..................................................................................................... 3
2 J1—Analog Interface Pinout................................................................................................ 4
3 J2—Digital Interface Pinout ................................................................................................ 4
4 J3 Pinout...................................................................................................................... 5
5 Jumper Descriptions......................................................................................................... 7
6 Bill of Materials ............................................................................................................. 21

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MSOP-8EVM and MSOP-8EVM-PDK
1 EVM Overview
1.1 Features
MSOP-8EVM Features:
• Full-featured evaluation board for a variety of single-channel, 8-pin, micro-SOP, 14- to 16-bit, serial
output, ADCs
• Onboard reference and buffer circuits
• High-speed serial interface
• Modular design for use with a variety of DSP and microcontroller interface boards
For use with a computer, the MSOP-8EVM-PDK is available. This kit combines the MSOP-8EVM board
with the DSP-based MMB0 motherboard, and includes ADCPro™ software for evaluation.
The MMB0 motherboard allows the MSOP-8EVM to be connected to the computer via an available USB
port. This manual shows how to use the MMB0 as part of the MSOP-8EVM-PDK, but does not provide
technical details on 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 MSOP-8EVM-PDK is controlled by a plug-in that is executed in ADCPro.
This manual covers the operation of both the MSOP-8EVM and the MSOP-8EVM-PDK. It does not
describe the MMB0 motherboard in detail. Throughout this document, the abbreviation EVM and the term
evaluation module are synonymous with the MSOP-8EVM.
1.2 Introduction
The modular MSOP-8 evaluation module is an updated version of the popular Burr-Brown DEM-MSOP-8
evaluation board. The EVM is designed so that a single printed wiring board (PWB) supports a variety of
test configurations for high-speed 14- and 16-bit serial ADCs.
The modular EVM form factor allows for direct evaluation of the ADC performance and operating
characteristics. This EVM is compatible with the 5-6K Interface Board (SLAU104), also available from
Texas Instruments.
1.3 Related Documentation
Table 1 lists documents related to the MSOP-8EVM. To obtain a copy of any of these TI documents, call
the Texas Instruments Literature Response Center at [phone] or the Product Information Center
(PIC) at [phone]. When ordering, identify this booklet by its title and literature number. Updated
documents can also be obtained through our website at www.ti.com.
Table 1. Related Documentation
EVM-Compatible Device Data Sheets Literature Number
ADS8320 SBAS108
ADS8321 SBAS123
ADS8324 SBAS172
ADS8325 SBAS226
ADS8326 SBAS343
Application Notes/Additional Literature from TI Literature Number
Op Amps for Everyone SLOD006
5-6K Interface Board SLAU104
Single and Bipolar Signal Conditioning Boards SLAU105

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2 Analog Interface
For maximum flexibility, the modular MSOP-8EVM 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 J1. This header/socket provides access to the analog input
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 2. J1—Analog Interface Pinout
Pin Number Signal Description
J1.2 AD_IN+ Noninverting input for differential devices, and analog input for single-ended devices
J1.4 AD_IN– Inverting input for differential devices, and analog ground for single-ended devices
J1.6 Unused
Pins are unused and should be left open for use with future amplifier and sensor input
modules
J1.8 Unused
J1.10 Unused
J1.12 Unused
J1.14 Unused
J1.16 Unused
J1.18 REF(–) Unused
J1.20 REF(+) External reference source input
J1.15 Unused Unused
J1.1 to J1.19
(odd) AGND Analog ground connections (except J1.15)
3 Digital Interface
The modular MSOP-8EVM is designed for easy interfacing to 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 J2. This header/socket provides access to the digital control and serial data
pins of the MSOP-8EVM. Consult Samtec at http://www.samtec.com or 1-800-SAMTEC-9 for a variety of
mating connector options.
Table 3. J2—Digital Interface Pinout
Pin Number Signal Name Description
J2.1 CS Chip select, active low signal. Enables data transfer, jumper configurable (see the
schematic located at the end of this document)
J2.3 SCLK Serial clock
J2.5 SCLKr Serial clock return (for DSP host systems)
J2.7 FS Frame sync for DSP host systems; alternate chip select through JMP2 (see the schematic
located at the end of this document)
J2.9 FSr Frame sync return (for DSP host systems)
J2.11 Unused Unused
J2.13 SDO Serial data output
J2.15 Unused Unused
J2.17 Unused Unused
J2.19 SPARE
4 Power Supplies
The modular MSOP-8EVM board requires +5V dc for the analog section. This power source supplies the
voltage reference (U2), the reference buffer (U4), and optionally, the ADC installed on the EVM (via
JMP1). Supply voltages of +1.8V to +5V dc for the digital section are also required. When used in
combination with one of the DAP Interface boards, J3 provides connection to the common power bus
described in the 5-6 K Interface Board User's Guide, (SLAU104). Table 4 shows the pinout for J3.

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Table 4. J3 Pinout
Pin Number Signal Pin Number Signal
1 Unused 6 AGND
2 Unused 7 +1.8VD
3 +5VA 8 +VD1
4 Unused 9 +3.3VD
5 DGND 10 +5VD
When power is supplied to J3, JMP3 allows for one of four different dc voltages to be applied to the digital
sections of the ADC. Review the schematic (located at the end of this document) and PWB silkscreen
(see Figure 3) for further details.
4.1 ADC Power
The device installed on the modular MSOP-8EVM has several options with regard to its power source.
Refer to the schematic shown at the end of this document for details about the following information.
JMP1 and JMP3 allow the user to select the power supply used by the ADC. When JMP1 is in the default
factory position (shunt on pins 1-2), power to the ADC comes from J3.3 or TP5. Single gate digital buffers
(U3, U5, and U6) are installed on the ADC digital input/output lines to allow operation with low-voltage
controllers, such as the MSP430. The supply voltage to these buffers is determined by JMP3 or the
voltage applied to TP7.

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4.2 Standalone Operation
When used as a standalone EVM, the analog power can be applied to TP5 and referenced to TP6. Digital
power can be applied to TP7, referenced to TP4. While filters are provided for all power-supply inputs,
optimal performance of the EVM requires a clean, well-regulated power source.
CAUTION
The ADCs that are compatible with this EVM have a variety of power-supply
requirements. Check the appropriate data sheet and verify that all power
supplies are within the safe operating limits of the ADC before applying power
to the EVM.
4.3 Reference Voltage
The modular MSOP-8 can be configured to use the onboard reference/buffer circuits (U2 and U4) or an
external reference applied to J1.20. Jumpers JMP5 and JMP6 control the reference source. In the factory
default position (shunt on JMP5 pins 1-2), a 2.5V reference is supplied by U2. Moving the shunt at JMP5
to positions 2-3 allows an external reference applied to J1.20 to be used.
CAUTION
The ADCs that are compatible with this EVM have a variety of reference
requirements. Check the appropriate data sheet and verify that the external
reference sources are within the safe operating limits of the ADC before
applying power to the EVM.
JMP6 controls the actual application of the reference source to the ADC. In the factory default position
(shunt on pins 1-2), the reference source is the onboard reference/buffer circuit. Moving the shunt to JMP6
to pins 2-3 allows the voltage applied to the ADC (+VADC) to be used as the reference source.

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5 EVM Operation
This section provides information on the analog input, digital control, and general operating conditions of
the MSOP-8EVM.
5.1 Analog Input
The analog input source can be applied directly to J1 (top or bottom side) or through optional amplifier and
signal conditioning modules. The analog input range depends on the configuration of the EVM and the
ADC installed at location U1. Consult the specific device data sheet to determine the maximum analog
input range.
5.2 Digital Control
The digital control signals can be applied directly to J2 (top or bottom side). The modular MSOP-8EVM
can also be connected directly to a DSP or microcontroller interface board. Visit the product folder for the
MSOP-8EVM or the installed device for a current list of compatible interfaces and/or recommended
accessory boards.
5.3 Chip Select (Shutdown)
Jumper JMP2 is provided to allow the selection of the signals applied to the chip select (CS) or shutdown
(SHDN) pin of the ADC installed on the EVM. The factory default condition for the EVM has a shunt
jumper placed between pins 1-2 of JMP2. This configuration allows the Frame Sync (FS) signal from a
DSP host system to be used as a chip select for the ADC. This signal originates from J2.7. When JMP2 is
moved to pins 2-3, the CS (SHDN) signal is applied via J2.1.
5.4 Digital I/O Buffers
Single gate buffers U3, U5, and U6 are provided to ensure the safe operation of the modular MSOP-8EVM
with low-voltage host controllers. The digital I/O voltage applied to these buffers via JMP3 should be set in
accordance with the operating voltage of the host controller.
5.5 Default Jumper Locations
Table 5 lists the jumpers found on the EVM and the respective factory default condition of each.
Table 5. Jumper Descriptions
Jumper Shunt Position Jumper Description
JMP1 Pins 1-2 Controls ADC supply voltage (default is +5V analog source)
JMP2 Pins 1-2 Controls ADC CS (SHDN) pin (default is FS from DSP host)
JMP3 Pins 5-6 Controls digital I/O voltage (default is +3.3V digital source)
JMP4 CLOSED Ties analog and digital grounds together
JMP5 Pins 1-2 Controls external reference source (default is +2.5V from U2)
JMP6 Pins 1-2 Controls reference source to ADC (default is onboard reference/buffer circuit)

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6 MSOP-8EVM-PDK Kit Operation
This section provides information on using the MSOP-8EVM-PDK, including setup, program installation,
and program usage.
To prepare to evaluate the MSOP-8EVM with the MSOP-8EVM-PDK, complete the following steps:
Step 1. Install the ADCPro software (if not already installed).
Step 2. Install the MSOP-8EVM-PDK EVM plug-in software.
Step 3. Set up the MSOP-8EVM-PDK.
Step 4. Connect a proper power supply or use the included ac adapter.
Step 5. Run the ADCPro software.
Step 6. Complete the Microsoft Windows®USB driver installation process.
Each step is described in the subsequent sections of this document.
6.1 Installing the ADCPro Software
Do not connect the MSOP-8EVM-PDK before installing the software. Failure to observe this procedure
may cause Windows to not recognize the MSOP-8EVM-PDK.
The latest software is available from Texas Instruments' website at http://www.ti.com/. The CD-ROM
shipped with the MSOP-8EVM may not contain the latest software, but the ADCPro installer will check for
updates when run, if connected to the Internet, and then give you the option of downloading and installing
the latest version. Refer to the ADCPro User's Guide for instructions on installing and using ADCPro.
To install the MSOP-8EVM-PDK plug-in, run the file: adsXXXXevm-pdk-plugin-1.0.0.exe for the installed
device (1.0.0 is the version number, and increments with software version releases; you may have a
different version on your CD). Double-click the file to run it; then follow the instructions shown. You can
also use the ADCPro Update Check feature to check for newer versions of the MSOP-8EVM-PDK plug-in,
once you have installed one version of it.
The software should now be installed, but the USB drivers may not yet have been loaded by the PC
operating system. This step completes when the ADCPro software is executed; see the section titled
Running the Software and Completing Driver Installation .

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6.2 Setting Up the MSOP-8EVM-PDK
The MSOP-8EVM-PDK contains both the MSOP-8EVM and the MMB0 motherboard; however, the
devices are shipped unconnected. Follow these steps to set up the MSOP-8EVM-PDK:
Step 1. Unpack the MSOP-8EVM-PDK kit.
Step 2. Set the jumpers and switches on the MMB0 as shown in Figure 2.
(a) Set the Boot Mode switch to USB.
(b) Connect +5V and +5VA on jumper block J13 (if +5V is supplied from J14 +5VA).
(c) Leave +5V and +VA disconnected on jumper block J13.
(d) If the PDK will be powered from an ac adapter, and used in unipolar mode, connect J12.
If the PDK will be powered through the terminal block or will be used in bipolar mode,
disconnect J12.
Figure 2. MMB0 Initial Setup
Step 3. Set the jumpers on the MSOP-8 EVM board as shown in Figure 3 (note that these jumpers
are the factory-configured settings for the MSOP-8 EVM):
(a) Set I/O Voltage jumper block JMP3 as shown in Figure 3.
(b) Set the reference source select jumpers (JMP5 and JMP6) to the onboard/BUF positions.
(c) Set the CS/SHDN source select jumper (JMP2) to the FS position.
(d) Set up VCC jumper block JMP1 as shown in Figure 3.

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Figure 3. MSOP-8 EVM Board Initial Setup
Step 4. Plug the MSOP-8EVM into the MMB0.
Figure 4. Connecting the MSOP-8EVM to the MMB0 Motherboard
CAUTION
Do not misalign the pins when plugging the MSOP-8EVM into the MMB0.
Check the pin alignment of J1, J2 and J3 carefully before applying power to the
PDK.
6.2.1 About the MMB0
The MMB0 is a modular EVM system motherboard. It is designed around the TMS320VC5507, a DSP
from Texas Instruments that has an onboard USB interface. 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 offer
support for the MMB0 except as part of an EVM kit. For schematics or other information about the MMB0,
contact Texas Instruments.

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6.3 Connecting the Power Supply
The MSOP-8EVM-PDK can be operated with a unipolar +5V supply, in which case an external lab power
supply can be used via J2 with the included CA-2186 cable or via J14. 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; however, it does not indicate that the EVM power supplies are operating properly.
6.3.1 Connecting an External Supply
An external supply can be connected to barrel jack J2 on the MMB0 using the included CA-2186 cable. J2
is located next to the USB connector. The adapter must output 6V to 9V dc. The connector must be
sleeve-negative, tip-positive. It should have a current rating of at least 500mA. Figure 5 shows the correct
connections.
Jumper J12 on the MMB0 connects the external power supply to the board. To use the external power
supply, J12 must be shorted.
Figure 5. Connecting an AC Adapter

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6.3.2 Connecting a Laboratory Power Supply
A laboratory power supply can be connected through terminal block J14 on the MMB0, as shown in
Figure 6.
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.
Figure 6. Laboratory Power-Supply Connection

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6.4 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 MSOP-8EVM-PDK is called ADCPro. This program uses plug-ins to
communicate with the EVM. The MSOP-8EVM-PDK plug-in is included in the MSOP-8EVM-PDK package.
The program currently runs only on Windows XP.
Follow these procedures to run ADCPro and complete the necessary driver installation:
Step 1. Start the software by selecting ADCPro from the Windows Start menu. The screenshot shown
in Figure 7 appears.
Figure 7. ADCPro Software Start-up Display Window

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Step 2. Select ADSXXXXEVM (where ADSXXXXEVM is the installed device which is to be
evaluated) from the EVM drop-down menu. The ADSXXXXEVM-PDK plug-in appears in the
left pane, as shown in Figure 8.
Figure 8. ADS8326EVM-PDK Plug-In Display Window
Step 3. The MSOP-8EVM-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. You will see a series of messages
in the status area indicating this action.
Step 4. Apply power to the PDK and connect the board to an available PC USB port.
Step 5. If you have not yet loaded the operating system drivers, Windows will display the Found New
Hardware Wizard sequence (illustrated in Figure 9 through Figure 13). Accept the default
settings.

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Figure 9. Found New Hardware Wizard, Screen 1
Figure 10. Found New Hardware Wizard, Screen 2

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Figure 11. Found New Hardware Wizard, Screen 3
Figure 12. Found New Hardware Wizard, Screen 4

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Figure 13. Found New Hardware Wizard, Screen 5
Step 6. When Windows installs the software driver, the plug-in downloads the firmware to the MMB0.
Step 7. Windows will display the installation wizard a second time. Again, accept the default settings.
Step 8. The status area displays a connected message. The software is now ready to use.
The driver installation wizard sequence should not appear again, unless you connect the board to a
different USB port.

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7 Evaluating with the ADCPro Software
The evaluation software is based on ADCPro, a program that operates using a variety of plug-ins. (The
MSOP-8EVM plug-in is installed as described in the installation 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 you select a different plug-in, the previous
plug-in is unloaded.
7.1 Using the MSOP-8EVM-PDK Plug-In
The MSOP-8EVM-PDK plug-ins for ADCPro provide complete control over all settings of the MSOP-8EVM
devices. The MSOP-8EVM device settings can be adjusted when not acquiring data. During acquisition,
all controls are disabled and settings may not be changed.
When you change a setting on the MSOP-8EVM device plug-in, the setting is immediately updated on the
board.
If you unload and reload the plug-in, the software will attempt to load settings from the board.
Settings on the MSOP-8EVM device correspond to the settings described in the particular installed device
data sheet. For example, if the installed MSOP-8EVM device is the ADS8326, see the ADS8326 data
sheet (available for download at www.ti.com) for details.
The user-configurable settings include Sample Rate,Vref and Mode. The sample rate can only be set up
to the maximum stipulated sample rate in the device data sheet (that is, 250kHz for the ADS8326) and
Vref is specified in the device data sheet (that is, 0.1V to 5V for the ADS8326). The three available clock
modes are Continuous Clock—Max SCLK,Clockstop Mode—Max SCLK, and Continuous
Mode—Stretched SCLK.
7.1.1 Continuous Clock—Max SCLK
In this mode, SCLK frequency is given as the highest possible serial clock frequency for the data
converter under test. The sampling frequency can be adjusted to any desired rate by entering a value in
the sampling rate window. The software associated with the MSOP-8 plugin adjusts the number of clock
cycles between rising CS pulses to accommodate the requested sampling rate while keeping the serial
clock speed constant.
Figure 14. Continuous Clock—Max SCLK

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7.1.2 Clockstop Mode—Max SCLK
In this mode, SCLK frequency is also the highest possible serial clock frequency for the data converter
under test. The sampling frequency can be adjusted to any desired rate by entering a value in the
sampling rate window. The primary difference in this mode of operation is that there are 24 cycles of the
serial clock applied to the ADC while the CS input is active. Delay time is added between CS to
accommodate the desired sampling rate.
Figure 15. Clockstop Mode—Max SCLK
7.1.3 Continuous Mode—Stretched SCLK
In this mode, SCLK frequency is calculated by the following equation: SCLK = sampling rate ×
cycles/sample. The number of clock cycles per sample period depend on the data converter under test
(for the ADS8326, this value is 24). Therefore, with the maximum sampling frequency, SCLK = 250kHz ×
24 = 6MHz. The number of SCLK cycles applied to the converter is fixed, and the period of the SCLK
automatically scales to reach the desired sampling rate for the given device.
Figure 16. Continuous Mode—Stretched SCLK

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7.1.4 Collecting Data
Once you have configured the ADSXXXXEVM device for your test scenario, pressing the ADCPro Acquire
button starts the collection of the number of data points specified in the Test plug-in Block Size control.
The ADSXXXXEVM-PDK plug-in disables all the front panel controls while acquiring and displays a
progress bar, as shown in Figure 17.
Figure 17. Progress Bar While Collecting Data
For more information on testing ADCs in general and using ADCPro and Test plug-ins, refer to the
ACDPro User's Guide.
7.2 Troubleshooting
If ADCPro stops responding while the ADSXXXXEVM-PDK is connected, unplug the power supply from
the PDK. Unload and reload the plug-in before reapplying power to the PDK.