TI1 C1608X7R1H104KT Contains all support circuitry needed for the ads1174/ads1274 Datasheet

User's Guide
SBAU134A – August 2008 – Revised May 2009
ADS1174EVM, ADS1274EVM, ADS1174EVM-PDK, and
ADS1274EVM-PDK
Figure 1. ADS1274EVM (Left) and ADS1274EVM-PDK (Right)
This user's guide describes the characteristics, operation, and use of the ADS1174EVM and
ADS1274EVM, both by themselves and as part of the ADS1174EVM-PDK or ADS1274EVM-PDK. These
evaluation modules (EVMs) are evaluation boards for the ADS1274, a 24-bit multi-channel, delta-sigma
analog-to-digital converter (ADC), and the ADS1174, a 16-bit version of the ADS1274. The EVM allows
evaluation of all aspects of the ADS1174 or ADS1274 devices. Complete circuit descriptions, schematic
diagrams, and bills of material are included in this document.
The following related documents are available through the Texas Instruments web site at www.ti.com.
EVM-Compatible Device Data Sheets
Device
Literature Number
Device
Literature Number
ADS1274
SBAS367B
OPA1632
SBOS286A
ADS1174
SBAS373A
SN74LVC2G157
SCES207K
REF5025
SBOS410
TPS73018
SBVS054H
REF3125
SBVS046C
TPS65131
SLVS493B
OPA2350
SBOS099C
PCA9535
SCPS129H
ADCPro is a trademark of Texas Instruments.
Microsoft, Windows are registered trademarks of Microsoft Corporation.
SPI is a trademark of Motorola.
I2C is a trademark of NXP Semiconductors.
NI-VISA is a trademark of National Instruments.
All other trademarks are the property of their respective owners.
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Contents
EVM Overview ............................................................................................................... 3
Analog Interface.............................................................................................................. 4
Digital Interface .............................................................................................................. 4
Power Supplies .............................................................................................................. 6
Voltage Reference ........................................................................................................... 7
Power-Down, Mode and Format Control ................................................................................. 8
Clock Source ................................................................................................................. 8
EVM Operation ............................................................................................................... 9
ADS1274EVM-PDK Kit Operation ....................................................................................... 12
Evaluating Performance with the ADCPro Software ................................................................... 24
Schematics and Layout .................................................................................................... 28
List of Figures
1
2
3
4
5
6
7
8
9
10
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12
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14
15
16
17
18
19
20
21
22
23
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25
26
27
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31
ADS1274EVM (Left) and ADS1274EVM-PDK (Right) .................................................................. 1
Connector J2 ................................................................................................................. 5
Connectors J15, J16 ........................................................................................................ 7
Connector J1 ................................................................................................................. 7
Switch S1 ..................................................................................................................... 7
Jumper J19 ................................................................................................................... 9
Amplifier Selection Switches ............................................................................................... 9
ADS1274EVM Default Jumper Locations ............................................................................... 11
MMB0 Initial Setup ........................................................................................................ 13
Connecting ADS1274EVM to MMB0 ................................................................................... 14
Connecting an AC Adapter ............................................................................................... 15
Laboratory Power-Supply Connection ................................................................................... 16
NI-VISA Driver Installation ................................................................................................ 17
NI-VISA Driver Installation Question .................................................................................... 18
NI-VISA Driver Installing .................................................................................................. 18
NI-VISA Driver Complete Installation ................................................................................... 19
NI-VISA Driver Verification Using Device Manager ................................................................... 19
ADCPro Software Start-up Display Window ............................................................................ 20
ADS1274EVM-PDK Plug-In Display Window........................................................................... 21
Install New Driver Wizard Screen 1 ...................................................................................... 22
Install New Driver Wizard Screen 2 ...................................................................................... 22
Install New Driver Wizard Screen 3 ...................................................................................... 23
Install New Driver Wizard Screen 4 ...................................................................................... 23
Install New Driver Wizard Screen 5 ...................................................................................... 24
USBSytx Driver Verification Using Device Manager .................................................................. 24
Channel Enable............................................................................................................. 25
Manual Channel Control................................................................................................... 25
Clock Settings and Mode .................................................................................................. 26
Operating Mode ............................................................................................................ 26
Output Data Format ........................................................................................................ 27
Progress Bar While Collecting Data ..................................................................................... 27
List of Tables
1
2
3
4
5
6
7
2
J9/J7:Analog Interface Pinout .............................................................................................. 4
J5: Serial Interface Pins ..................................................................................................... 4
J3 Configuration: Power-Supply Input .................................................................................... 6
J15 +10V Selection .......................................................................................................... 6
J16 –10V Selection .......................................................................................................... 6
List of Switches ............................................................................................................. 11
Operating Modes: Clock Frequency ..................................................................................... 26
ADS1174EVM, ADS1274EVM, ADS1174EVM-PDK, and ADS1274EVM-PDK
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ADS1174EVM/ADS1274EVM Bill of Materials ......................................................................... 28
1
EVM Overview
1.1
Features
ADS1174EVM/ADS1274EVM Features:
• Contains all support circuitry needed for the ADS1174/ADS1274
• +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
ADS1174EVM-PDK/ADS1274EVM-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 ADS1174EVM-PDK or ADS1274EVM-PDK is available. This kit combines
the ADS1174EVM/ADS1274EVM board with the DSP-based MMB0 motherboard, and includes ADCPro™
software for evaluation.
The MMB0 motherboard allows the ADS1174EVM/ADS1274EVM to be connected to the computer via an
available USB port. This manual shows how to use the MMB0 as part of the
ADS1174EVM-PDK/ADS1274EVM-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 ADS1174EVM-PDK/ADS1274EVM-PDK is controlled by a plug-in running in ADCPro. For
more information about ADCPro, see the ADCPro™ Analog-to-Digital Converter Evaluation Software
User's Guide (literature number SBAU128), available for download from the TI web site.
This manual covers the operation of both the ADS1174EVM/ADS1274EVM and the
ADS1174EVM-PDK/ADS1274EVM-PDK. Throughout this document, the abbreviation EVM and the term
evaluation module are synonymous with the ADS1174EVM and the ADS1274EVM. For clarity of reading,
the remainder of this manual will refer only to the ADS1274EVM or ADS1274EVM-PDK, but operation of
the EVM and kit for the ADS1174 is identical, unless otherwise noted.
1.2
Introduction
The ADS1274EVM is an evaluation module built to the TI Modular EVM System specification. It can be
connected to any modular EVM system interface card.
The ADS1274EVM is available as a stand-alone printed circuit board (PCB) or as part of the
ADS1274EVM-PDK, which includes an MMB0 motherboard and related software. As a stand-alone PCB,
the ADS1274EVM is useful for prototyping designs and firmware.
Note that the ADS1274EVM has no microprocessor and cannot run software. To connect it to a computer,
some type of interface is required.
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Analog Interface
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Analog Interface
For maximum flexibility, the ADS1274EVM 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 of
the ADS1274. Consult Samtec at http://www.samtec.com or call 1-800-SAMTEC-9 for a variety of mating
connector options. These signals can also be connected to the terminal block J7.
Most of the pins on J7 and J9 are directly connected, with no filtering or protection. Use appropriate
caution when handling these pins. Table 1 summarizes the pinouts for analog interfaces J9 and J7.
Table 1. J9/J7:Analog Interface Pinout
Pin Number
Signal
Description
J9.1, J7-2
A1N
AINN1, ADS1274
J9.2, J7-3
A1P
AINP1, ADS1274
J9.3, J7-4
A2N
AINN2, ADS1274
J9.4, J7-5
A2P
AINP2, ADS1274
J9.5, J7-6
A3N
AINN3, ADS1274
J9.6, J7-7
A3P
AINP3, ADS1274
J9.7, J7-8
A4N
AINN4, ADS1274
J9.8, J7-9
A4P
AINP4, ADS1274
J9.18
EXTREFN
External Reference source input
(– side of differential input)
J9.20
EXTREFP
External Reference source input
(+ side of differential input)
J9.10-16 (even)
Unused
J9.15
Unused
J9.9-19 (odd), J7-1
AGND
3
Digital Interface
3.1
Serial Data Interface
Analog ground connections (except J1.15)
The ADS1274EVM 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 J5. 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.
All logic levels on J5 are 3.3V CMOS, except for the I2C™ pins. These pins conform to 3.3V I2C rules.
Table 2 describes the J5 serial interface pins.
Table 2. J5: Serial Interface Pins
4
Pin No.
Pin Name
Signal Name
I/O Type
Pullup
J5.1
CNTL
SYNC
In
High
J5.2
GPIO0
MODE0
In
High
J5.3
CLKX
SCLK
In
None
ADS1274 SPI™
clock
J5.4
DGND
DGND
In/Out
None
Digital Ground
J5.5
CLKR
CLKR
Out
None
SCLK clock
J5.6
GPIO1
MODE1
In
High
J5.7
FSX
/DRDY/FSYNC
In/Out
Low
J5.8
GPIO2
FORMAT0
In
High
ADS1174EVM, ADS1274EVM, ADS1174EVM-PDK, and ADS1274EVM-PDK
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Table 2. J5: Serial Interface Pins (continued)
Pin No.
Pin Name
Signal Name
I/O Type
Pullup
J5.9
FSR
/DRDY/FSYNC
In/Out
None
Function
J5.10
DGND
DGND
In/Out
None
Digital Ground
J5.11
DX
DIN
In
None
ADS1274 SPI data
in
J5.12
GPIO3
FORMAT1
In
High
J5.13
DR
DOUT1
Out
None
J5.14
GPIO4
FORMAT2
In
None
J5.15
/INT
/DRDY/FSYNC
Out
None
J5.16
SCL
SCL
I2C
n/a
I2C clock
J5.17
TOUT
CLK
In
None
Can be used to
provide a clock from
a processor
J5.18
DGND
DGND
In/Out
None
Digital Ground
J5.19
GPIO5
CLK Select
J5.20
SDA
SDA
ADS1274 data out
None
I2C
n/a
I2C data
Many pins on J5 have weak pull-up/pull-down resistors. These resistors provide default settings for many
of the control pins. Many pins on J5 correspond directly to ADS1274 pins. See the ADS1274 product data
sheet for complete details on these pins.
3.2
Data Output
Most data communications are directed through DOUT1. The data from all eight channels can be
observed on the DOUT1 pin using the TDM mode. That is the signal used by the ADS1274EVM-PDK to
read back and display all the channels. All the data output signals (DOUT1 to DOUT4) can be monitored
on J2. Figure 2 illustrates the pinout for J2.
Figure 2. Connector J2
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Power Supplies
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Power Supplies
J3 is the power-supply input connector. Table 3 lists the configuration details for J3. Analog inputs to the
ADC can be applied directly to the device (see Section 8.1, Analog Input), bypassing the onboard
amplifiers, 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 to
generate a +10V and –10V supply. For optimum noise performance, the external supplies (+VA and –VA)
should be used.
Table 3. J3 Configuration: Power-Supply Input
Pin No.
Pin Name
Function
Required
J3.1
+VA
+10V to +15V
Yes, unless onboard +10V is
used.
J3.2
–VA
–10V to –15V
Yes, unless onboard –10V is
used.
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
J3.8
+3.3VD
3.3V digital supply
Always
J3.9
VD1
Not used
No
J3.10
+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 the
respective supply currents.
4.1
Bipolar Power Options
J15 and J16 require a jumper to select the voltage used by the onboard amplifiers. The external voltages
can range from 10V to 15V. The onboard voltage is always 10V. Table 4 and Table 5 list the options for
J15 and J16, respectively. Figure 3 shows the pinout for connectors J15 and J16.
Table 4. J15 +10V Selection
Jumper
Name
Function
1-2 (OB)
+10V
Select the +10V that is generated on the
EVM
2-3 (EXT)
+VA
Select the external +VA voltage
Table 5. J16 –10V Selection
6
Jumper
Name
Function
1-2
–10V
Select the –10V that is generated on the
EVM
2-3
–VA
Select the external –VA voltage
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Figure 3. Connectors J15, J16
5
Voltage Reference
The ADS1274EVM has three sources for the reference voltage. Jumper J1 can select the voltage from
either the REF3125(U1) or REF5025(U2). The reference from either source is filtered and buffered by
U3A. Switch S1 chooses either the onboard reference or the external reference voltage that is connected
to the reference pins of J9. Figure 4 illustrates the pinout for connector J1. Figure 5 shows switch S1 as it
appears on the EVM.
Figure 4. Connector J1
Figure 5. Switch S1
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Power-Down, Mode and Format Control
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Power-Down, Mode and Format Control
The ADS1274 has several pins to control power-down of individual channels, and mode and format for the
digital interface. These pins are controlled on the EVM either through software or hardware (using
switches S10 and S11).
For users of the ADS1274EVM as a stand-alone module, these pins may be pulled high or low through
DIP switches S10 and S11. Refer to the ADS1274 product data sheet for complete details on these pins
and which state sets which options.
For use in the ADS1274EVM-PDK, the state of these pins is controlled by software, using the I2C port
expander on the EVM. When used in the ADS1274EVM-PDK, DIP switches S10 and S11 must all be
switched so that they are down, toward the center of the board. The ADS1274EVM-PDK software will
check at startup to verify that these switches are set correctly, and will generate an error message if they
are not. However, it cannot detect if the switches are changed after startup.
CAUTION
When using the EVM as part of the ADS1274EVM-PDK, DIP switches S10 and
S11 must all be switched so that they are down, toward the center of the board.
Failure to do so may damage the EVM.
7
Clock Source
The ADS1274 clock can come from one of several sources: the onboard 27MHz crystal oscillator, a clock
supplied 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, the
high-resolution mode, the low-power mode, or low-speed mode with CLKDIV set to 1. If the performance
of the device must be explored with CLKDIV set to 0 in the low-power and low-speed modes, an external
clock must be provided to the board, either using the TOUT connection or having an external clock source
connected to J18. The same is true if frequencies other than the 27MHz provided by the onboard oscillator
must be investigated.
7.1
Usage in PDK
If using the ADS1274EVM as part of the ADS1274EVM-PDK, J19 should not have any pins shorted.
Remove any shorting blocks on jumper J19. The ADS1274EVM-PDK software will allow selection of the
clock source under software control (this option is accomplished by using port 05 of the I2C expander
U17). The software allows selection of the onboard 27MHz oscillator, or a clock provided by a PLL on the
MMB0 which directly drives the appropriate CLK pins of the interface, or an external, customer supplied
clock. If an external clock is selected with the software, this clock must be provided on J18. Note that if the
external clock is selected and no clock is provided, the software may hang waiting for data from the
converter.
7.2
Usage as a Stand-Alone EVM
If using the EVM in your own system and not with the PDK hardware and software, observe the following
recommendations:
• J17 should be removed if the external clock source is used and the TOUT pin is still driven by a
processor in order to avoid conflicts.
• Jumper J19 can be used to always select the 27MHz crystal (IOVDD position) or allow the
onboard/external clock selection to be controlled by GPIO5 (J5.19) as shown in Figure 6.
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Figure 6. Jumper J19
8
EVM Operation
The following section provides information on the analog input, digital control, and general operating
conditions of the ADS1274EVM.
8.1
Analog Input
The analog input sources (channels 1-4) can be applied directly to J9 (top or bottom side) or through
signal-conditioning modules available for the the modular EVM system. Terminal block J7 is connected in
parallel with the analog signal connections to J9.
Each input signal can be selected to connect directly to the analog inputs of the ADS1274 or they can use
the OPA1632 buffers that are provided. Switches S2-5 can be switched away from the ADS1274 to select
the Terminal Block (TBK) or towards the ADS1274 to select the Amplifier (AMP) for the analog inputs 1
through 4 as shown in Figure 7.
Figure 7. Amplifier Selection Switches
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EVM Operation
8.2
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Digital Control
The digital control signals can be applied directly to J5 (top or bottom side). The modular ADS1274EVM
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, or the MMB0 if purchased as part of
the ADS1274EVM-PDK. For a list of compatible interface and/or accessory boards for the EVM or the
ADS1274, see the relevant product folder on the TI web site. Some of the digital signals are controlled
directly with pins on J5. Other signals such as the Power Down controls can only be controlled with slide
switches or by U17 and U18 that are set up and read using the I2C signals on pins 16 and 18 of J5. The
Format and Mode pins can be controlled by all three methods (slide switches, GPIO pins on J5, and the
I2C control from U17).
The ADS1274 allows the serial interface to be used in two different formats: an SPI-compatible mode and
a 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:
• 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 the
CLKR pin (J5.5) allowing the serial port of a processor to be synchronized to the converter master
clock.
• 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 switch
S12 can be read back by software.
The right position of S12, marked FS, selects the frame-sync format. In this format, the signals are
connected 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 port
of a processor to be synchronized to the converter master clock.
• The CLK input of the converter is driven by the CLKR signal (J5.5). This connection ensures that the
CLK and SCLK signals have the same phase and the correct ratio as outlined in the data sheet of the
device.
• Port P10 of the I2C port expander U18 is connected to a logic low level, so that the position of switch
S12 can be read back by software.
For use in the ADS1274EVM-PDK, S12 must be in the right (FS) position, which is the default factory
setting.
Switching to SPI format will allow the EVM to connect to any SPI-compatible processor that does not
support the frame-sync mode. If this format is selected, keep in mind that the high-speed mode will not
work at full speed (32.768MHz) because of the limitations outlined in the device product data sheet.
8.3
ADS1274EVM-PDK Power Supply
The ADS1274EVM can either be powered by an AC adapter or by applying the 5V, +10V and –10V to the
connectors on the MMB0 board. The MMB0 board will provide the 5V and 3.3V to the ADS1274EVM
along with the +10V and –10V signals. Because the circuitry is provided on the ADS1274EVM to generate
+10V and –10V, the complete system can be powered from the supplied AC adapter that supplies +6V
and 3A.
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8.4
Default Jumper Settings and Switch Positions
Figure 8 shows the jumpers found on the EVM and the respective factory default conditions for each.
Figure 8. ADS1274EVM Default Jumper Locations
Table 6 lists the switches found on the EVM and the respective factory default conditions for each.
Table 6. List of Switches
Switch
Default Position
Switch Description
S1
Left
Onboard Reference
S2–S4
Left
AIN2–4 Terminal Block (amplifiers
bypassed)
S5
Down
AIN1 Terminal Block (amplifiers bypassed)
S12
Right
Frame-sync format
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ADS1274EVM-PDK Kit Operation
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ADS1274EVM-PDK Kit Operation
This section provides information on using the ADS1274EVM-PDK, including setup, program installation,
and program usage.
To prepare
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Step 7.
to evaluate the ADS1274 with the ADS1274EVM-PDK, complete the following steps:
Install the ADCPro software (if not already installed) on a PC.
Install the ADS1274EVM-PDK EVM plug-in software.
Set up the ADS1274EVM-PDK.
Connect a proper power supply or use the included AC adapter.
Complete the NI-VISA™ USB driver installation process.
Run the ADCPro software.
Complete the Microsoft Windows USB driver installation process.
Each task is described in the subsequent sections of this document.
9.1
Installing the ADCPro Software
CAUTION
Do not connect the ADS1274EVM-PDK before installing the software on a
suitable PC. Failure to observe this caution may cause Microsoft Windows to
not recognize the ADS1274EVM-PDK.
The latest software is available from the TI website at www.ti.com/. The CD-ROM shipped with the
ADS1274EVM may not contain the latest software, but the ADCPro installer will check for updates when
executed (if connected to the Internet), and then give you the option of downloading and installing the
latest version. Refer to the ADCPro User Guide for instructions on installing and using ADCPro.
To install the ADS1274EVM-PDK plug-in, run the file: ads1274evm-pdk-plugin-1.0.0.exe (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 utilize the ADCPro
Update Check feature to check for newer versions of the ADS1274EVM-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 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 ADS1274EVM-PDK
The ADS1274EVM-PDK contains both the ADS1274EVM and the MMB0 motherboard; however, the
devices are shipped unconnected. Follow these steps to set up the ADS1274EVM-PDK.
Step 1. Unpack the ADS1274EVM-PDK kit.
Step 2. Set the jumpers and switches on the MMB0 as shown in Figure 9.
• 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 9.3 for details on connecting the
power supply.)
Figure 9. MMB0 Initial Setup
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Step 3.
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Plug the ADS1274EVM into the MMB0 as Figure 10 illustrates.
Figure 10. Connecting ADS1274EVM to MMB0
CAUTION
Do not misalign the pins when plugging the ADS1274EVM into the MMB0.
Check the pin alignment carefully before applying power to the PDK.
Step 4.
14
Set the jumpers and switches on the ADS1274EVM as shown in Figure 7 (note that these
settings are the factory-configured settings for the EVM). Note that the default configuration
for the EVM is to use external ±10V supplies for the input amplifiers.
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9.2.1
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 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.
9.3
Connecting the Power Supply
The ADS1274EVM-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 3.3V
supply for the MMB0 is operating properly. (It does not indicate that the EVM power supplies are
operating properly.)
9.3.1
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 to 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 11 illustrates how to connect an AC adapter to the MMB0.
Figure 11. Connecting an AC Adapter
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9.3.2
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Connecting a Laboratory Power Supply
A laboratory power supply can be connected through terminal block J14 on the MMB0, as shown in
Figure 12. 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/+5VA
position on J13 is shorted.
Figure 12. Laboratory Power-Supply Connection
9.4
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 ADS1274EVM-PDK is called ADCPro. This program uses plug-ins to
communicate with the EVM. The ADS1274EVM-PDK plug-in is included in the ADS1274EVM-PDK
package.
The program currently runs only on Microsoft Windows platforms of Windows XP; Windows Vista is NOT
supported.
If this is the first time installing ADCPro and plug-ins, follow these procedures to run ADCPro and
complete the necessary driver installation. Make sure the ADCPro software and device plug-in software
are installed from the CD-ROM as described in Section 9.1.
16
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9.4.1
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 13 through Figure 16 are provided for reference to show the installation steps.
• For the first screen, Figure 13, it is not necessary to search for the software; it has already been
installed to your PC.
• For the remaining steps, accept the default settings.
Figure 13. NI-VISA Driver Installation
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Figure 14. NI-VISA Driver Installation Question
Figure 15. NI-VISA Driver Installing
18
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Figure 16. NI-VISA Driver Complete Installation
This should complete the installation of the NI-VISA drivers. You can verify proper installation by opening
the Device Manager and locating as shown in Figure 17.
Figure 17. NI-VISA Driver Verification Using Device Manager
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9.4.2
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USBStyx Driver Installation
Step 1. Start the software by selecting ADCPro from the Windows Start menu. The screen in
Figure 18 appears.
Figure 18. ADCPro Software Start-up Display Window
Step 2.
20
Select ADS1274EVM from the EVM drop-down menu. The ADS1274EVM-PDK plug-in
appears in the left pane, as shown in Figure 19.
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Figure 19. ADS1274EVM-PDK Plug-In Display Window
Step 3.
Step 4.
Note:
The ADS1274EVM-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.
If you have not yet loaded the operating system drivers, Windows will display the Windows
Install New Driver Wizard sequence (illustrated in Figure 20 through Figure 24). Accept the
default settings.
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.
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Figure 20. Install New Driver Wizard Screen 1
Figure 21. Install New Driver Wizard Screen 2
22
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Figure 22. Install New Driver Wizard Screen 3
Figure 23. Install New Driver Wizard Screen 4
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Figure 24. Install New Driver Wizard Screen 5
Step 5.
Step 6.
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, you can try resetting the MMB0 by
pressing reset and then reloading the plug-in.
You can 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 25 shows.
Figure 25. USBSytx Driver Verification Using Device Manager
The driver installation wizard sequence should not appear again, unless you connect the board to a
different USB port.
10
Evaluating Performance with the ADCPro Software
The evaluation software is based on ADCPro, a program that operates using a variety of plug-ins. (The
ADS1274EVM 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.
24
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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.
10.1 Using the ADS1274EVM-PDK Plug-in
The ADS1274EVM-PDK plug-in for ADCPro provides complete control over all settings of the ADS1274. It
consists of a tabbed interface (see Figure 19), with different functions available on different tabs. These
controls are described in this section.
You can adjust the ADS1274EVM settings when it is not acquiring data. During acquisition, all controls are
disabled and settings may not be changed.
When you change a setting on the ADS1274EVM plug-in, the setting immediately updates on the board.
Settings on the ADS1274EVM correspond to settings described in the ADS1274 product data sheet; see
the ADS1274 data sheet for details.
Because the effective data rate of the ADS1274 depends upon settings of the Clock Freq and Operating
Mode, the Data Rate indicator in the upper right corner of the plug-in interface is always visible and
updates whenever a setting changes that affects the data rate.
10.1.1
Channel Enable Tab
The ADS1274 can acquire from one to four channels simultaneously. The Channel Enable tab (as shown
in Figure 26) provides the control to turn each channel on or off.
Figure 26. Channel Enable
In addition, the Manual Control button (shown in Figure 27) can be used to enable or disable all the
channels.
Figure 27. Manual Channel Control
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10.1.2
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Settings Tab
The ADS1274 requires a clock to operate. The maximum frequency is selected for the different operating
modes, as shown in Table 7.
Table 7. Operating Modes: Clock Frequency
Operating Mode
CLKDIV
Frequency (MHz)
High-Speed
32.768
High-Resolution
27
Low-Power
1
27
Low-Power
0
13.5
Low-Speed
1
27
Low-Speed
0
5.4
If the PLL is selected as the clock source, a frequency can be entered in the Clock Frequency box; the
software will find the closest frequency that is possible for the PLL to synthesize (and which is within the
maximum allowable frequency for the mode selected) and will set the clock to that frequency, as well as
display the actual frequency used in the Clock Frequency box once focus has moved from that control.
Figure 28. Clock Settings and Mode
The Operating Mode control (illustrated in Figure 29) can select from High-Speed, High-Resolution,
Low-Power, or Low-Speed.
Figure 29. Operating Mode
26
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The CLKDIV control can be selected to be 0 or 1. The Data Output Formats are limited to the Frame
Sync, TDM Format, but both Dynamic and Fixed Mode can be selected. Figure 30 shows the output data
format options.
Figure 30. Output Data Format
10.1.3
Collecting Data
Once you have configured the ADS1274 for your 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
ADS1274EVM-PDK plug-in disables all the front panel controls while acquiring, and displays a progress
bar as shown in Figure 31.
Figure 31. 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 User Guide.
10.2 Troubleshooting
If ADCPro stops responding while the ADS1274EVM-PDK is connected, try unplugging the power supply
from the PDK. Unload and reload the plug-in before reapplying power to the PDK.
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Schematics and Layout
11
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Schematics and Layout
Schematics for the ADS1174EVM and ADS1274EVM are appended to this user's guide. The bill of
materials is provided in Table 8.
11.1 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 Texas Instruments web site.)
Table 8. ADS1174EVM/ADS1274EVM Bill of Materials
28
Item
No.
Qty
Value
Ref Des
1
6
47
R39-R45. R44,
R45
2
16
49.9
3
1
4
Description
Vendor
Part Number
Resistor, Thick Film Chip 47 Ω,
5%, 1/10W, Size = 0603
Panasonic
ERJ-3GEYJ470V
R36, R46,
R56-R69
Resistor, Thick Film Chip 49.9 Ω,
1%, 1/16W, Size = 0603
Panasonic
ERJ-3EKF49R9V
100
R37
Resistor, Thick Film Chip 100 Ω,
5%, 1/10W, Size = 0603
Panasonic
ERJ-3GEYJ101V
18
1K
R2-R19
Resistor, Thick Film Chip 1 kΩ,
1%, 1/16W, Size = 0603
Panasonic
ERJ-3EKF1001V
5
1
2K
R38
Resistor, Thick Film Chip 2 kΩ,
5%, 1/10W, Size = 0603
Panasonic
ERJ-3GEYJ202V
6
1
4.22K
R71
Resistor, Thick Film Chip 4.22 kΩ,
1%, 1/16W, Size = 0603
Panasonic
ERJ-3EKF4221V
7
3
10K
R50, R51, R70
Resistor, Thick Film Chip 10 kΩ,
5%, 1/10W, Size = 0603
Panasonic
ERJ-3GEYJ103V
9
1
47K
R47
Resistor, Thick Film Chip 47 kΩ,
5%, 1/10W, Size = 0603
Panasonic
ERJ-3GEYJ473V
10
2
100K
R1,R72
Resistor, Thick Film Chip 100 kΩ,
5%, 1/10W, Size = 0603
Panasonic
ERJ-3GEYJ104V
11
2
150K
R53, R54
Resistor, Thick Film Chip 150 kΩ,
5%, 1/10W, Size = 0603
Panasonic
ERJ-3GEYJ154V
12
2
470K
R48, R49
Resistor, Thick Film Chip 470 kΩ,
5%, 1/10W, Size = 0603
Panasonic
ERJ-3GEYJ474V
13
1
1.1M
R52
Resistor, Thick Film Chip 1.1 MΩ,
5%, 1/8W, Size = 0805
Rohm
MCR10EZHF1104
14
1
1.24M
R55
Resistor, Thick Film Chip 1.24 MΩ, Rohm
5%, 1/8W, Size = 0805
MCR10EZHF1244
15
2
100K
RA1, RA2
Resistor, Chip Array 10 Terminal
Bus 100 kΩ, 5%, 1/16W, SMD
CTS
745C101104JPTR
16
2
6.2pF
C28, C29
Capacitor, C0G Ceramic 6.2 pF
±0.5pF, 50WV, Size = 0603
Murata
GRM1885C1H6R2DZ01D
17
8
1.5nF
C36-C43
Capacitor, C0G Ceramic 1500 pF
±5%, 50WV, Size = 0603
TDK
C1608C0G1H152JT
18
4
2.2nF
C17-C20
Capacitor, C0G Ceramic 2200
pF±5%, 50WV, Size = 0603
TDK
C1608C0G1H222JT
19
1
4.7nF
C33
Capacitor, X7R Ceramic 4700 pF
±10%, 50WV, Size = 0603
TDK
C1608X7R1H472KT
20
3
10nF
C32, C34, C76
Capacitor, X7R Ceramic 0.01 µF
±5%, 50WV, Size = 0603
TDK
C1608X7R1H103KT
21
28
0.1 µF
C4-C12, C26,
C52-C63,
C77-C80, C83,
C84
Capacitor, X7R Ceramic 0.1 µF
±10%, 50WV, Size = 0603
TDK
C1608X7R1H104KT
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Table 8. ADS1174EVM/ADS1274EVM Bill of Materials (continued)
Item
No.
Qty
Value
Ref Des
22
1
0.15 µF
C3
Capacitor, X7R Ceramic 0.15 µF
±10%, 25WV, Size = 0603
TDK
C1608X7R1E154KT
23
1
0.22 µF
C35
Capacitor, X7R Ceramic 0.22 µF
±10%, 16WV, Size = 0603
TDK
C1608X7R1C224KT
24
1
0.47 µF
C1
Capacitor, X5R Ceramic 0.47 µF
±10%, 10WV, Size = 0603
TDK
C1608X5R1A474KT
25
2
1 µF
C27, C81
Capacitor, X7R Ceramic 1 µF
±10%, 16WV, Size = 0603
TDK
C1608X7R1C105KT
26
1
4.7 µF
C25
Capacitor, X7R Ceramic 4.7 µF
±10%, 6.3WV, Size = 0805
Murata
GRM21BR61C475KA88L
27
5
10 µF
C21-C24, C82
Capacitor, X5R Ceramic 10 µF
±20%, 16WV, Size = 1206
TDK
C3216X5R1C106MT
28
2
22 µF
C30, C31
Capacitor, X5R Ceramic 22 µF
±20%, 16WV, Size = 1210
TDK
C3225X5R1C226MT
29
1
100 µF
C2
Capacitor, X5R Ceramic 100 µF
±20%, 6.3WV, Size = 1210
TDK
C3225X5R0J107MT
30
1
U4
Precision Delta-Sigma ADC, 4
Differential Input
Texas
Instruments
ADS1274IPAP
(ADS1274EVM) or
ADS1174IPAP
(ADS1174EVM)
31
1
U2
Precision Voltage Reference, 2.5V
Texas
Instruments
REF5025ID
32
1
U3
Operational Amplifier, Dual
Texas
Instruments
OPA2350EA
33
1
U1
Precision Voltage Reference
Texas
Instruments
REF3125AIDBZ
34
4
U8-U11
Fully-Differential Amplifier
Texas
Instruments
OPA1632DGN
35
1
U19
Single, Inverter
Texas
Instruments
SN74LVC1G04DBVR
36
1
U20
Single, D Flip-Flop
Texas
Instruments
SN74LVC2G74DCTR
35
1
U6
Single, 2-Line to 1 Data
Selector/Multiplexer
Texas
Instruments
SN74LVC2G157DCT
36
1
U16
LDO Voltage Regulator, 1.8 V, 200 Texas
mA
Instruments
TPS73018DBV
37
1
U5
Dual output 800-mA DC/DC Switch Texas
boost converter
Instruments
TPS65131RGET
38
2
U17, U18
16-Bit I2C I/O Expander
Texas
Instruments
PCA9535RGE
39
1
U21
EEPROM, 1.8V, 256K
Microchip
24AA256-I/ST
39
1
U7
3.3-V Oscillator
CTS
CB3LV-3I-27M0000
40
2
J5A, J9A
20-pin SMT Plug
Samtec
TSM-110-01-L-DV-P
41
2
J5B, J9B
20-pin SMT Socket
Samtec
SSW-110-22-F-D-VS-K
42
1
J3A
10-pin SMT Plug
Samtec
TSM-105-01-L-DV-P
43
1
J3B
10-pin SMT Socket
Samtec
SSW-105-22-F-D-VS-K
44
2
J2, J6
Header Strip, 4-pin ( )
Samtec
TSW-102-07-L-D
46
3
J4, J17, J18
Header Strip, 2-pin ( )
Samtec
TSW-102-07-L-S
47
4
J1, J15, J16,
J19
Header Strip, 4-pin ( )
Samtec
TSW-103-07-L-S
48
1
J7
Terminal Block 3.5-mm 9-Position
PCB
On Shore
Technology
ED555/9DS
27 MHz
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Schematics and Layout
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Table 8. ADS1174EVM/ADS1274EVM Bill of Materials (continued)
30
Item
No.
Qty
49
1
N/A
50
2
51
52
Value
Ref Des
Description
Vendor
Part Number
ADS1274EVM or ADS1174EVM
PWB
Texas
Instruments
6492532 or 6496219
D1, D2
Schottky Diode, 20V, 1A
ON
Semiconductor
MBRM120LT1G
5
J10-J14
Bus Wire (18-22 Gauge)
2
L1, L2
Inductor, 4.7 µH, 1.8 A, 6x6mm,
SMD
EPCOS
B82462G4472M
53
5
S1-S5
Switch, Mini Slide, DPDT
NKK
SS22SDP2
54
1
S10
DIP Switch, Half-Pitch, 8-Position
C&K
TDA08H0SB1
55
1
S11
DIP Switch, Half-Pitch, 6-Position
C&K
TDA06H0SB1
56
1
S12
4PDT Slide Switch, Top Actuator
Tyco/Alcoswitch
MMS42
56
1
TP8
PCB Test Point, Large Loop,
Through-hole
Keystone
Electronics
5011
57
7
N/A
Shorting Blocks
Samtec
SNT-100-BK-G-H
ADS1174EVM, ADS1274EVM, ADS1174EVM-PDK, and ADS1274EVM-PDK
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1
2
3
4
5
6
REVISION HISTORY
ENGINEERING CHANGE NUMBER
S1
150nF
0.1uF
8
R39
3
S10
1
2
3
4
J12
OPA2350
1K
RA1
2
C12
0.1uF
1
IOVDD
8
7
6
5
DIPSWITCH-4
TRIM
C79 IOVDD
24
23
22
21
20
19
IOVDD
0.1uF
D
S11
DIPSWITCH-6
RA2
100K
TP5
TP6
TP7
TP11
100K
U2
VOUT
PCA9535RGE
A2
A1
INT
VCC
SDA
SCL
1
2
3
4
5
6
C6
0.1uF
AVDD
VIN
TEMP
GND
P06
P07
GND
P10
P11
P12
TP2 TP3
1
C2
100uF
J1
JPR-1X3
2
C81 3
1uF 4
7
8
9
10
11
12
4
3
2
1
R2
AVDD
47
U3A
2
U18
SW-DPDT
0.47uF
D
6
5
4
3
2
1
C21
10uF
REFN
C4
12
11
10
9
8
7
C3
AVDD
REF3125AIDBZ
APPROVED
13
14
15
16
17
18
C1
2K
2
IN
OUT
GND
P13
P14
P15
P16
P17
A0
U1
1
3
REFP
P05
P04
P03
P02
P01
P00
R38
AVDD
IOVDD
6
R1
100K
C82
10uF
5
IOVDD
SN74LVC2G74DCTR
AN2
AINN2
TP8
GND
U19
J14
C10
0.1uF
1
C11
0.1uF
20
19
18
17
AINP1
2
1
4
6
EXT CLK
2
4
C23
10uF
4
C9
0.1uF
C76
10nF
1K
+VA
-VA
EPC_B82462-G4472-M
J3
C22
10uF
-VA
-5VA
AGND
VD1
+5VD
2
4
6
8
10
J4
JPR-2X1
C25
4.7 uF
POWERHDR
R37
100
J3A (TOP) = SAM_TSM-105-01-L-DV-P
J3B (BOTTOM) = SAM_SSW-105-22-F-D-VS-K
A
GPIO5
U7
6
1
2
4
VCC A/B
Y
A
Y
B
G
GND
OBCLK
1
3
EOH
OUT
C26
0.1uF
R72
47
100k
IOVDD
+10V
B
PCA9535RGE
IOVDD
+VA
+10V
R50
RA3
100K
C28
6.2 pF
D1
J15
10K
C30
22 uF 16V
R53
J20
VA+
10K
150K
R71
4.22K
U5
1
24
7
5
6
4
8
9
10
11
19
12
MBRM120
INP
INP
BSW
INN
INN
VIN
ENP
PSP
ENN
PSN
AGND
NC
VPOS
FBP
VREF
FBN
VNEG
OUTN
OUTN
CP
CN
PGND
PGND
NC
23
22
17
16
15
13
14
21
18
2
3
20
R54
150K
R51
C29
10K
6.2 pF
HEADER-3X2
-VA
MBRM120
C33
4.7 nF
C32
10 nF
L2
EPC_B82462-G4472-M
C31
22 uF 16V
4
A0
A1
A2
WP
8
5
6
4
VCC
SDA
SCL
GND
ti
-10V
-10V
1
2
3
7
DATA ACQUISITION PRODUCTS
J16
HIGH-PERFORMANCE ANALOG DIVISION
SEMICONDUCTOR GROUP
VA-
6730 SOUTH TUCSON BLVD., TUCSON, AZ 85706 USA
ENGINEER
RUSSELL ANDERSON
DRAWN BY
RUSSELL ANDERSON
5
1 OF 2
C84
0.1uF
MCP_24LC256-I/ST
TP10
D2
SHEET
3
2
4
6
C35
0.22 uF
R55
1.24M
C80
0.1uF
IOVDD
U21
1
3
5
R70
DOCUMENT CONTROL NO. 6496220
2
0.1uF
TP9
TPS65131RGE
1
IOVDD
C34
4
10 nF
2
VCC
GND
R48
470K CTS_CB3LV-3I-27.0000-T
SN74LVC2G157DCT
L1
2
+VA
+5VA
DGND
+1.8VD
+3.3VD
1
C24
10uF
1
3
5
7
9
8
5
3
7
IOVDD
C78
U6
IOVDD
R45
R52
1.1M
R3
IOVDD
47K
24
23
22
21
20
19
A2
A1
INT
VCC
SDA
SCL
47
2
TP1
AVDD
R47
JPR-1X3 EXT
1
3
C27
1uF
J11
1
TPS73018DBV
1
2
3
P06
P07
GND
P10
P11
P12
P13
P14
P15
P16
P17
A0
D2
D4
7
8
9
D1 10
D2 11
D3 12
1
2
3
C77
0.1uF
J18
2
1
J19
J2
U17
470K
R44
AVDD
5
IN
OUT
EN
GND
NR
R49
DOUT
DVDD
U16
1
3
2
5
3
Q
Q
IOVDD
AINN1
IOVDD
J5A (TOP) = SAM_TSM-110-01-L-DV-P
J5B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K
1
2
3
C20
2.2nF C0G
AN1
D
CLK
TP4
AINP2
AINN2
AINP1
AINN1
B
GND
SERIALHDR
U20
IOVDD
2
DOUT
AP1
C83
0.1uF
VCC
PRE
2
GND
CLR
1
6
5
4
3
2
1
4
DVDD
3
J13
C
13
14
15
16
17
18
C19
2.2nF C0G
DOUT1
DOUT2
DOUT3
DOUT4
2
47
D1
D3
AINP2
AP2
AINP4
AINN4
AINP3
AINN3
SN74LVC1G04DBV
R42
NC
NC
NC
NC
AINN3
61
62
63
64
AINP2
AINN2
AINP1
AINN1
C18
2.2nF C0G
AN3
AINP4
AINN4
AINP3
AINN3
28
27
26
25
24
23
22
21
2
4
P05
P04
P03
P02
P01
P00
47
13
14
15
16
AINP3
AP3
DVDD
DGND
DGND
IOVDD
IOVDD
DGND
TEST0
TEST1
CLKDIV
SYNC
DIN
C8
0.1uF
VREFN
AGND
AGND
AVDD
8
9
10
11
12
57
58
59
60
AVDD
AGND
DGND
AN4
AINN4
SCLK
CLK
5
6
7
C17
2.2nF C0G
AVDD
AGND
VCOM
VREFP
1
2
3
4
VCOM
AINP4
AP4
53
54
55
56
C7
0.1uF
1
3
R41 47
R40
2
4
6
8
10
12
14
16
18
20
GPIO0
DGND
GPIO1
GPIO2
DGND
GPIO3
GPIO4
SCL
DGND
SDA
D4
42
41
40
39
38
37
36
35
34
33
FORMAT0
FORMAT1
FORMAT2
DRDY/FSYNC
5
SheetB
SheetB.Sch
ALC_MMS42
32
31
30
29
CNTL
CLKX
CLKR
FSX
FSR
DX
DR
INT
TOUT
GPIO5
2
1
C5
0.1uF
NC
NC
NC
NC
J6
J17
49
50
51
52
OPA2350
C
44
43
J10
1
3
5
7
9
11
13
15
17
19
1
2
5
J5
SYNC
SCLK
S12
8
7
6
7
U4
ADS1174IPAP
PWDN1
PWDN2
PWDN3
PWDN4
DGND
DGND
DGND
DGND
MODE
NC
AVDD
AVDD
AGND
U3B
NC
NC
NC
NC
48
47
46
45
REF5025
TITLE
SIZE B
ADS1174EVM
DATE 29 AUG 2008
FILE
6
REV B
A
1
2
3
4
5
6
REVISION HISTORY
REV
1.5nF C0G
+10V
8
0.1uF
3
+
1K
-
+
1
-
1K
6
R57
C53
OPA1632
C37
S2
49.9
CHAN-N4
ANN4
C54
0.1uF
1.5nF C0G
R7
R9
1K
0.1uF
3
+
5
2
4
-
1
1K
+
6
-
C39
ANN4
49.9
S3
CHAN-P3
ANP3
49.9
CHAN-N3
C57
0.1uF
0.1uF
-10V
1.5nF C0G
R58
R59
C56
OPA1632
ANP4
ANN3
SW-DPDT
C
R11
1K
ANP3
R12 1K
C40
ANN3
+10V
1.5nF C0G
J7
R13
0.1uF
3
+
-
VOCM
R14
C58
U10
8
1K
1
1K
+
5
2
4
6
-
S4
49.9
CHAN-P2
ANP2
CHAN-N2
ANN2
SW-DPDT
C60
0.1uF
0.1uF
-10V
C41
R60
R61 49.9
C59
OPA1632
TERMBLOCK-MINI-9
CHAN-P4
CHAN-N4
CHAN-P3
1.5nF C0G
R15
ANP2
ANN2
ANP1
ANN1
B
VCOM
C55
VOCM
R10
CM
+10V
U9
8
SW-DPDT
R8 1K
C38
1K
C
CHAN-P4
ANP4
49.9
0.1uF
-10V
1.5nF C0G
R56
5
2
4
VOCM
R6
D
C52
U8
R5
APPROVED
CM
R4 1K
C36
D
ENGINEERING CHANGE NUMBER
CHAN-N3
CHAN-P2
1K
CHAN-N2
+10V
1.5nF C0G
R17
J9
1
3
5
7
9
11
13
15
17
19
AN0AN1AN2AN3AGND
AGND
AGND
VCOM
AGND
AGND
AN0+
AN1+
AN2+
AN3+
AN4+
AN5+
AN6+
AN7+
REFREF+
2
4
6
8
10
12
14
16
18
20
3
+
VOCM
1K
+
REFN
REFP
6
OPA1632
C43
AN4
AP3
AN3
AP2
AN2
B
AP1
AN1
0.1uF
-
1
CHAN-N1
C61
U11
8
1K
R18
CHAN-P1
R16 1K
C42
AP4
-10V
5
2
4
R62
S5
49.9
R63 49.9
C62
0.1uF
CHAN-P1
ANP1
CHAN-N1
ANN1
SW-DPDT
C63
0.1uF
1.5nF C0G
R19
ANALOGHDR
1K
J9A (TOP) = SAM_TSM-110-01-L-DV-P
J9B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K
ti
A
DATA ACQUISITION PRODUCTS
HIGH-PERFORMANCE ANALOG DIVISION
SEMICONDUCTOR GROUP
6730 SOUTH TUCSON BLVD., TUCSON, AZ 85706 USA
ENGINEER RUSSELL ANDERSON
TITLE
ADS1174EVM
DRAWN BY RUSSELL ANDERSON
DOCUMENT CONTROL NO. 6496220
SHEET
1
2
3
4
5
2 OF
2
SIZE B
DATE
29 AUG 2008
FILE
6
REV
B
A
1
2
3
4
5
6
REVISION HISTORY
ENGINEERING CHANGE NUMBER
S1
150nF
0.1uF
8
R39
3
S10
1
2
3
4
J12
OPA2350
1K
RA1
2
C12
0.1uF
1
IOVDD
8
7
6
5
DIPSWITCH-4
TRIM
C79 IOVDD
24
23
22
21
20
19
IOVDD
0.1uF
D
S11
DIPSWITCH-6
RA2
100K
TP5
TP6
TP7
TP11
100K
U2
VOUT
PCA9535RGE
A2
A1
INT
VCC
SDA
SCL
1
2
3
4
5
6
C6
0.1uF
AVDD
VIN
TEMP
GND
P06
P07
GND
P10
P11
P12
TP2 TP3
1
C2
100uF
J1
JPR-1X3
2
C81 3
1uF 4
7
8
9
10
11
12
4
3
2
1
R2
AVDD
47
U3A
2
U18
SW-DPDT
0.47uF
D
6
5
4
3
2
1
C21
10uF
REFN
C4
12
11
10
9
8
7
C3
AVDD
REF3125AIDBZ
APPROVED
13
14
15
16
17
18
C1
2K
2
IN
OUT
GND
P13
P14
P15
P16
P17
A0
U1
1
3
REFP
P05
P04
P03
P02
P01
P00
R38
AVDD
IOVDD
6
R1
100K
C82
10uF
5
U4
J5
IOVDD
SN74LVC2G74DCTR
C19
2.2nF C0G
AN2
AINN2
TP8
GND
U19
2
J14
C10
0.1uF
1
C11
0.1uF
20
19
18
17
AINP1
2
1
4
6
D2
D4
2
4
EXT CLK
C23
10uF
4
C9
0.1uF
C76
10nF
1K
+VA
-VA
EPC_B82462-G4472-M
J3
C22
10uF
-VA
-5VA
AGND
VD1
+5VD
2
4
6
8
10
J4
JPR-2X1
C25
4.7 uF
POWERHDR
R37
100
J3A (TOP) = SAM_TSM-105-01-L-DV-P
J3B (BOTTOM) = SAM_SSW-105-22-F-D-VS-K
A
8
5
3
7
GPIO5
U7
6
1
2
4
VCC A/B
Y
A
Y
B
G
GND
C26
0.1uF
OBCLK
1
3
EOH
OUT
R72
47
100k
IOVDD
0.1uF
B
PCA9535RGE
+10V
IOVDD
TP9
+VA
+10V
R50
RA3
100K
C28
6.2 pF
D1
J15
10K
C30
22 uF 16V
R53
J20
VA+
10K
150K
R71
4.22K
U5
1
24
7
5
6
4
8
9
10
11
19
12
MBRM120
INP
INP
BSW
INN
INN
VIN
ENP
PSP
ENN
PSN
AGND
NC
VPOS
FBP
VREF
FBN
VNEG
OUTN
OUTN
CP
CN
PGND
PGND
NC
23
22
17
16
15
13
14
21
18
2
3
20
R54
150K
R51
C29
10K
6.2 pF
HEADER-3X2
-VA
MBRM120
C33
4.7 nF
C32
10 nF
L2
EPC_B82462-G4472-M
C31
22 uF 16V
4
A0
A1
A2
WP
8
5
6
4
VCC
SDA
SCL
GND
ti
-10V
-10V
1
2
3
7
DATA ACQUISITION PRODUCTS
J16
HIGH-PERFORMANCE ANALOG DIVISION
SEMICONDUCTOR GROUP
VA-
6730 SOUTH TUCSON BLVD., TUCSON, AZ 85706 USA
ENGINEER
RUSSELL ANDERSON
DRAWN BY
RUSSELL ANDERSON
5
1 OF 2
C84
0.1uF
MCP_24LC256-I/ST
TP10
D2
SHEET
3
2
4
6
C35
0.22 uF
R55
1.24M
C80
0.1uF
IOVDD
U21
1
3
5
R70
DOCUMENT CONTROL NO. 6492533
2
IOVDD
C34
4
10 nF
2
VCC
GND
R48
470K CTS_CB3LV-3I-27.0000-T
SN74LVC2G157DCT
TPS65131RGE
1
IOVDD
C78
L1
2
+VA
+5VA
DGND
+1.8VD
+3.3VD
1
C24
10uF
1
3
5
7
9
47K
U6
IOVDD
R45
R52
1.1M
R3
IOVDD
R47
24
23
22
21
20
19
A2
A1
INT
VCC
SDA
SCL
47
2
TP1
AVDD
1
2
3
P06
P07
GND
P10
P11
P12
JPR-1X3 EXT
1
3
C27
1uF
J11
1
TPS73018DBV
7
8
9
D1 10
D2 11
D3 12
1
2
3
C77
0.1uF
J18
2
1
J19
J2
U17
470K
R44
AVDD
5
IN
OUT
EN
GND
NR
R49
DOUT
DVDD
U16
1
3
2
5
3
Q
Q
IOVDD
AINN1
IOVDD
J5A (TOP) = SAM_TSM-110-01-L-DV-P
J5B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K
1
2
3
C20
2.2nF C0G
AN1
D
CLK
TP4
AINP2
AINN2
AINP1
AINN1
B
GND
SERIALHDR
U20
IOVDD
2
DOUT
AP1
C83
0.1uF
VCC
PRE
1
C
6
5
4
3
2
1
4
DVDD
GND
CLR
J13
3
DOUT1
DOUT2
DOUT3
DOUT4
2
47
D1
D3
AINP2
AP2
AINP4
AINN4
AINP3
AINN3
SN74LVC1G04DBV
R42
NC
NC
NC
NC
AINN3
61
62
63
64
AINP2
AINN2
AINP1
AINN1
C18
2.2nF C0G
AN3
AINP4
AINN4
AINP3
AINN3
28
27
26
25
24
23
22
21
2
4
P05
P04
P03
P02
P01
P00
47
13
14
15
16
AINP3
AP3
DVDD
DGND
DGND
IOVDD
IOVDD
DGND
TEST0
TEST1
CLKDIV
SYNC
DIN
C8
0.1uF
VREFN
AGND
AGND
AVDD
8
9
10
11
12
57
58
59
60
AVDD
AGND
DGND
AN4
AINN4
SCLK
CLK
5
6
7
C17
2.2nF C0G
AVDD
AGND
VCOM
VREFP
1
2
3
4
VCOM
AINP4
AP4
53
54
55
56
C7
0.1uF
1
3
R41 47
R40
5
SheetB
SheetB.Sch
FORMAT0
FORMAT1
FORMAT2
DRDY/FSYNC
P13
P14
P15
P16
P17
A0
1
C5
0.1uF
C
NC
NC
NC
NC
13
14
15
16
17
18
OPA2350
ALC_MMS42
32
31
30
29
2
4
6
8
10
12
14
16
18
20
GPIO0
DGND
GPIO1
GPIO2
DGND
GPIO3
GPIO4
SCL
DGND
SDA
2
49
50
51
52
J17
J10
CNTL
CLKX
CLKR
FSX
FSR
DX
DR
INT
TOUT
GPIO5
1
2
5
1
3
5
7
9
11
13
15
17
19
J6
8
7
6
7
SYNC
SCLK
S12
PWDN1
PWDN2
PWDN3
PWDN4
DGND
DGND
DGND
DGND
MODE0
MODE1
AVDD
AVDD
AGND
U3B
NC
NC
NC
NC
ADS1274IPAP
D4
42
41
40
39
38
37
36
35
34
33
44
43
48
47
46
45
REF5025
TITLE
SIZE B
ADS1274EVM
DATE 29 AUG 2008
FILE
6
REV B
A
1
2
3
4
5
6
REVISION HISTORY
REV
1.5nF C0G
+10V
8
0.1uF
3
+
1K
-
+
1
-
1K
6
R57
C53
OPA1632
C37
S2
49.9
CHAN-N4
ANN4
C54
0.1uF
1.5nF C0G
R7
R9
1K
0.1uF
3
+
5
2
4
-
1
1K
+
6
-
C39
ANN4
49.9
S3
CHAN-P3
ANP3
49.9
CHAN-N3
C57
0.1uF
0.1uF
-10V
1.5nF C0G
R58
R59
C56
OPA1632
ANP4
ANN3
SW-DPDT
C
R11
1K
ANP3
R12 1K
C40
ANN3
+10V
1.5nF C0G
J7
R13
0.1uF
3
+
-
VOCM
R14
C58
U10
8
1K
1
1K
+
5
2
4
6
-
S4
49.9
CHAN-P2
ANP2
CHAN-N2
ANN2
SW-DPDT
C60
0.1uF
0.1uF
-10V
C41
R60
R61 49.9
C59
OPA1632
TERMBLOCK-MINI-9
CHAN-P4
CHAN-N4
CHAN-P3
1.5nF C0G
R15
ANP2
ANN2
ANP1
ANN1
B
VCOM
C55
VOCM
R10
CM
+10V
U9
8
SW-DPDT
R8 1K
C38
1K
C
CHAN-P4
ANP4
49.9
0.1uF
-10V
1.5nF C0G
R56
5
2
4
VOCM
R6
D
C52
U8
R5
APPROVED
CM
R4 1K
C36
D
ENGINEERING CHANGE NUMBER
CHAN-N3
CHAN-P2
1K
CHAN-N2
+10V
1.5nF C0G
R17
J9
1
3
5
7
9
11
13
15
17
19
AN0AN1AN2AN3AGND
AGND
AGND
VCOM
AGND
AGND
AN0+
AN1+
AN2+
AN3+
AN4+
AN5+
AN6+
AN7+
REFREF+
2
4
6
8
10
12
14
16
18
20
3
+
VOCM
1K
+
REFN
REFP
6
OPA1632
C43
AN4
AP3
AN3
AP2
AN2
B
AP1
AN1
0.1uF
-
1
CHAN-N1
C61
U11
8
1K
R18
CHAN-P1
R16 1K
C42
AP4
-10V
5
2
4
R62
S5
49.9
R63 49.9
C62
0.1uF
CHAN-P1
ANP1
CHAN-N1
ANN1
SW-DPDT
C63
0.1uF
1.5nF C0G
R19
ANALOGHDR
1K
J9A (TOP) = SAM_TSM-110-01-L-DV-P
J9B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K
ti
A
DATA ACQUISITION PRODUCTS
HIGH-PERFORMANCE ANALOG DIVISION
SEMICONDUCTOR GROUP
6730 SOUTH TUCSON BLVD., TUCSON, AZ 85706 USA
ENGINEER RUSSELL ANDERSON
TITLE
ADS1274EVM
DRAWN BY RUSSELL ANDERSON
DOCUMENT CONTROL NO. 6492533
SHEET
1
2
3
4
5
2 OF
2
SIZE B
DATE
29 AUG 2008
FILE
6
REV
B
A
EVALUATION BOARD/KIT IMPORTANT NOTICE
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please be aware that these devices may be very warm to the touch.
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