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Texas Instruments AMC80EVM Users User guides
User's Guide
SBOU101 – March 2011
AMC80EVM
This user's guide describes the characteristics, operation, and use of the AMC80EVM evaluation board
(EVM). It provides a detailed description of the hardware design. It discusses how to set up and configure
the software, reviews the hardware, and reviews various aspects of the software operation. Throughout
this document, the terms evaluation board, evaluation module, test board, and EVM are synonymous with
the AMC80EVM. This user's guide also includes information regarding operating procedures and
input/output connections, an electrical schematic, printed circuit board (PCB) layout drawings, and a parts
list for the AMC80EVM.
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2
3
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5
6
7
Contents
Overview ..................................................................................................................... 3
AMC80EVM Hardware Setup ............................................................................................. 4
AMC80EVM Hardware Overview ......................................................................................... 6
AMC80EVM Software Setup .............................................................................................. 9
AMC80EVM Software Overview ......................................................................................... 11
AMC80EVM Documentation ............................................................................................. 19
Bill of Materials ............................................................................................................. 23
List of Figures
1
Typical Hardware Included with the AMC80EVM Kit ................................................................... 3
2
AMC80EVM Hardware Setup ............................................................................................. 4
3
AMC80 Test Board Block Diagram ....................................................................................... 5
4
SM-USB-DIG Platform Block Diagram ................................................................................... 6
5
Connecting the SM-USB-DIG Platform to the AMC80 Test Board ................................................... 7
6
USB DIG Platform Driver Installation Confirmation ..................................................................... 7
7
Unpopulated Pull-Up and Pull-Down Resistors ......................................................................... 8
8
AMC80EVM Software Install Window .................................................................................... 9
9
AMC80EVM License Agreements ....................................................................................... 10
10
AMC80EVM Software Interface
11
Communication Error with USB DIG Platform ......................................................................... 11
12
AMC80 Preparing to Read from Registers ............................................................................. 12
13
AMC80 Reading from Registers ......................................................................................... 12
14
AMC80 Writing to Registers
15
AMC80 Analog Inputs ..................................................................................................... 13
16
Max Temp Flag Trigger ................................................................................................... 14
17
Interrupt Inputs ............................................................................................................. 14
18
Fan Input Indicators and Divisor Controls .............................................................................. 15
19
Power-Supply Control ..................................................................................................... 15
20
Configuration Register Controls ......................................................................................... 15
21
Manufacturer ID and Stepping/Die Revision ID Controls
.........................................................................................
.............................................................................................
............................................................
11
13
16
Microsoft, Windows are registered trademarks of Microsoft Corporation.
SPI is a trademark of Motorola, Inc.
I2C is a trademark of NXP Semiconductors.
WinZIP is a registered trademark of WinZip International LLC.
All other trademarks are the property of their respective owners.
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22
Registers Tab .............................................................................................................. 16
23
Analog Voltages Graphs Tab ............................................................................................ 17
24
Temperature Graph Tab .................................................................................................. 18
25
The FAN Inputs Graph Tab .............................................................................................. 19
26
AMC80EVM Schematic ................................................................................................... 20
27
AMC80EVM PCB: Top Component Layout ............................................................................ 21
28
AMC80EVM PCB: Bottom Component Layout ........................................................................ 22
List of Tables
2
1
Contents of AMC80EVM Kit ............................................................................................... 4
2
Related Documentation .................................................................................................... 4
3
AMC80EVM Pin Connectors .............................................................................................. 5
4
AMC80EVM Bill of Materials
............................................................................................
AMC80EVM
23
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Overview
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1
Overview
The AMC80 is a hardware monitor that communicates over an I2C™ interface. The three I2C address pins
allow up to eight devices on a single bus.
The AMC80 has seven analog inputs that read positive voltages with 10-bit precision together with two fan
tachometer inputs, each with internal programmable divisors. The AMC80 performs sequenced
comparisons of the analog inputs with internal, programmable limits. When any value exceeds the
programmed limit, the interrupt outputs become active. The AMC80 can accept a 3.0V to 5.5V power
supply, and is available in a 24-pin TSSOP package.
1.1
AMC80EVM Kit Contents
Figure 1 shows all of the hardware included with the AMC80EVM kit. Contact the Texas Instruments
Product Information Center nearest you if any component is missing. It is highly recommended that you
also check the TI website at http://www.ti.com to verify that you have the latest versions of the related
software.
Figure 1. Typical Hardware Included with the AMC80EVM Kit
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Table 1 details the contents of the AMC80EVM kit.
Table 1. Contents of AMC80EVM Kit
1.2
Item
Quantity
AMC80 PCB Test Board
1
SM-USB-DIG Platform PCB
1
USB Cable Extender
1
User’s Guide CD
1
10-Pin Ribbon Cable
1
If You Need Assistance
If you have questions about the AMC80 evaluation module, contact the Linear Amplifiers Applications
Team at precisionamps@list.ti.com. Include AMC80EVM as the subject heading. Customer support is also
available through our user community, which is monitored by TI application engineers, at http://e2e.ti.com.
1.3
Related Documentation from Texas Instruments
The following documents provide information regarding Texas Instruments' integrated circuits used in the
assembly of the AMC80EVM. This user's guide is available from the TI web site under literature number
SBOU101. Any letter appended to the literature number corresponds to the document revision that is
current at the time of the writing of this document. Newer revisions may be available from the TI website,
or call the Texas Instruments' Literature Response Center at (800) 477-8924 or the Product Information
Center at (972) 644- 5580. When ordering, identify the document by both title and literature number.
Table 2. Related Documentation
Document
2
Literature Number
AMC80 Product Data Sheet
SBAS500
SM-USB-DIG Platform User’s Guide
SBOU098
AMC80EVM Hardware Setup
The AMC80EVM hardware consists of the SM-USB-DIG Platform and the AMC80 Test Board; these two
units are easily connected through a 10-pin, board-to-board connector that should be attached to the
SM-USB-DIG Platform and the AMC80EVM. Once these two units are connected, simply plug the USB
device from the SM-USB-DIG Platform into the computer, as shown in Figure 2.
USB
Connection
10-Pin
SM-USB-DIG
AMC80EVM
Test Board
Figure 2. AMC80EVM Hardware Setup
4
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2.1
Theory of Operation for AMC80EVM
Figure 3 shows the basic architecture of the AMC80 test board. The board requires power and I2C
communication with the SM-USB-DIG Platform. This configuration allows the AMC80EVM software to
communicate with the IC, as well as to simulate and monitor hardware driven interrupts via digital I/O
controllers. In addition, headers allow for application specific connections to be used on the AMC80EVM.
External
Fan Header
Interrupt Output
Test Points
2
10-Pin
Connector
IC
3.3V
External
Power
AMC80
CH0-6
Header
Interrupt Input Headers
Figure 3. AMC80 Test Board Block Diagram
2.2
Signal Definitions of H1 (10-Pin Male Connector Socket)
Table 3 shows the pinout for the 10-pin connector socket used to communicate between the AMC80EVM
and the SM-USB-DIG Platform. It should be noted that the AMC80 test board only uses the necessary I2C
communication lines (pins 1 and 3) and the VDUT and GND (pins 6 and 8) pins to issue commands to the
AMC80.
Table 3. AMC80EVM Pin Connectors
(1)
Pin on U1
Signal
1
I2C_SCL
2
CTRL/MEAS4
3
I2C_SDA1
4
CTRL/MEAS5
5
SPI_DOUT1
6
VDUT
7
SPI_CLK
8
GND
Description
I2C clock signal (SCL)
GPIO: Control output or measure input
I2C data signal (SDA)
GPIO: Control output or measure input
SPI™ data output (MOSI)
Switchable device under test (DUT) power supply: +3.3V, +5V,
Hi-Z (disconnected). (1)
SPI clock signal (SCLK)
Power return (GND)
9
SPI_CS1
SPI chip select signal (CS)
10
SPI_DIN1
SPI data input (MISO)
When VDUT is Hi-Z, all digital I/O are also Hi-Z.
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AMC80EVM Hardware Overview
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Theory of Operation for SM-USB-DIG Platform
Figure 4 shows the block diagram for the SM-USB-DIG Platform. This platform is a general-purpose data
acquisition system that is used on several different Texas Instruments' evaluation modules. The details of
its operation are included in a separate document. The block diagram shown in Figure 4 is given as a brief
overview of the platform.
The core of the SM-USB-DIG Platform is the TUSB3210, an 8052 microcontroller (μC) that has a built-in
USB interface. The microcontroller receives information from the host computer that it translates into
power, I2C, SPI, or other digital I/O patterns. During the digital I/O transaction, the microcontroller reads
the response of any device connected to the I/O interface. The response from the device is then sent back
to the PC where it is interpreted by the host computer.
+3.3V
VUSB
+5V
TUSB3210
8052 mC
with USB Interface
and UART
USB Bus
from
Computer
8Kx8-byte
EEPROM
Power-On Reset
+5.0V
2
SM USB DIG Platform
Power
Switching
USB Power
+3.0V
I C/SPI
Control and
Measure Bits
Buffers and
Level Translators
To Test Board
To Computer and Power Supplies
+3.3V
Regulator
VDUT
(H-Z, 3.3V, or 5V)
Switched
Power
Figure 4. SM-USB-DIG Platform Block Diagram
3
AMC80EVM Hardware Overview
3.1
Electrostatic Discharge Warning
CAUTION
Many of the components on the AMC80EVM are susceptible to damage by
electrostatic discharge (ESD). Customers are advised to observe proper ESD
handling precautions when unpacking and handling the EVM, including the use
of a grounded wrist strap at an approved ESD workstation.
6
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3.2
Connecting the Hardware
To connect the AMC80 Test Board and the SM-USB-DIG Platform together, gently slide the male and
female ends of the 10-pin connectors together, as illustrated in Figure 5. Make sure that the two
connectors are completely pushed together; loose connections may cause intermittent EVM operation.
Figure 5. Connecting the SM-USB-DIG Platform to the AMC80 Test Board
3.3
Loading the Software
Figure 6 shows the typical response to connecting the SM-USB-DIG Platform board to a PC USB port for
the first time. Typically, the computer responds with a Found New Hardware, USB Device pop-up dialog.
The pop-up window typically changes to Found New Hardware, USB Human Interface Device. This
pop-up indicates that the device is ready to be used. The SM-USB-DIG Platform uses the human interface
device drivers that are part of the Microsoft® Windows® operating system.
Figure 6. USB DIG Platform Driver Installation Confirmation
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AMC80EVM Hardware Overview
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AMC80EVM Features
This section describes some of the hardware features present on the AMC80EVM.
3.4.1
External Power and Communication Headers
The AMC80 test board contains headers and test points that allow external power and communication
sources to be used on the board. It is recommended that the SM-USB-DIG Platform not be attached when
external power and communication are used.
3.4.2
Analog Input Headers
The AMC80EVM features headers that allow connections to be made to the seven analog inputs of the
AMC80 device. In addition, the board features unpopulated surface mounts so that pull-up or pull-down
resistors may be added if required for a specific application, as shown in Figure 7.
Figure 7. Unpopulated Pull-Up and Pull-Down Resistors
3.4.3
Additional Test Points and Headers
The AMC80 test board features headers and test points connected to the AMC80 interrupts INT_IN, BTI,
GPI, and RESET_IN. This configuration allows external hardware triggering of the interrupts. In addition,
there are also test points for measuring the interrupt output pins: INT, RST/OS, and GPO. The INT and
GPO interrupt output pins are also connected to LEDs that indicate when the interrupts are active.
The AMC80EVM has a block terminal for easy access to the fan tachometer inputs. These inputs each
feature a strong pull-up resistor.
The AMC80EVM PCB also has SDA and SCL test points to monitor the I2C bus between the
SM-USB-DIG Platform and the AMC80EVM.
8
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4
AMC80EVM Software Setup
This section discusses how to install the AMC80EVM software.
4.1
Operating Systems for AMC80EVM Software
The AMC80EVM software has been tested on the Microsoft Windows XP operating system (OS) with
United States and European regional settings. The software should also function on other Windows
operating systems.
4.2
AMC80EVM Software Installation
The AMC80EVM software is included on the CD that is shipped with the EVM kit. It is also available
through the AMC80EVM product folder on the TI website. To download the software to your system, insert
the disc into an available CD-ROM drive. Navigate to the drive contents and open the AMC80EVM
software folder. Locate the compressed file (AMC80EVM.zip) and open it. Using WinZIP® or a similar file
compression program; extract the AMC80EVM files into a specific AMC80EVM folder (for example,
C:\AMC80\AMC80EVM) on your hard drive.
Once the files are extracted, navigate to the AMC80EVM folder you created on your hard drive. Locate the
setup.exe file and execute it to start the installation. The AMC80EVM software installer should begin the
installation process as shown in Figure 8.
Figure 8. AMC80EVM Software Install Window
After the installation process begins, the user must select the directory location where the program will be
installed, typically defaulting to C:\Program Files\AMC80EVM and C:\Program Files\National Instruments.
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Following this option, two license agreements are presented that must be accepted as shown in Figure 9.
After accepting the Texas Instruments and National Instruments license agreements, the progress bar
opens and shows the installation of the software. Once the installation process is completed, click Finish.
Figure 9. AMC80EVM License Agreements
10
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5
AMC80EVM Software Overview
This section discusses how to use the AMC80EVM software.
5.1
Starting the AMC80EVM Software
The AMC80EVM software can be operated through the Start menu in Windows. From the Start menu,
select All Programs; highlight the AMC80 folder, and then select the AMC80EVM program. Figure 10
illustrates how the software should appear when launched.
Figure 10. AMC80EVM Software Interface
Figure 11 shows an error that pops up if the computer cannot communicate with the AMC80EVM. If you
receive this error, first ensure that the USB cable is properly connected on both ends. Another possible
source for this error is a problem with the computer USB Human Interface Device driver. Make sure that
when you plug the in the USB cable, the computer recognizes the device. If the sound is on, you will hear
the distinctive sound that you expect when a USB device is properly connected to the PC.
Figure 11. Communication Error with USB DIG Platform
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AMC80EVM Software Overview
5.2
5.2.1
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Using the AMC80EVM Software
Reading from Registers
When first starting the AMC80EVM software, it is advised that the user confirm connections to the board
by pressing the Power button to provide power to the AMC80. Then press the Start button, toggle the
/INT_Clear button off (as shown in Figure 12), and press the Write all Reg button. This sequence enables
the software to monitor all inputs on the AMC80.
Figure 12. AMC80 Preparing to Read from Registers
To check the status of all device inputs, press the Read All Reg button or the Read Continuous button,
as shown in Figure 13. If the device is functioning correctly, no error messages are displayed.
Figure 13. AMC80 Reading from Registers
NOTE: The user cannot continuously perform Read all Register or Auto-Write Register operations
by repeatedly pressing the respective button.
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5.2.2
Writing to Registers
The AMC80EVM software contains two different methods for writing register data: Write All Reg and
Auto-Write Reg. Additionally, register configurations may be saved and recalled using the Save Register
File and Load Register File buttons indicated in Figure 14.
Figure 14. AMC80 Writing to Registers
5.2.3
Analog Inputs
Figure 15 shows example data read from an AMC80 device analog inputs. The Interrupt status indicator
turns bright green (as shown in Figure 15) when a high or low limit has been exceeded. The interrupt
clears only when the analog voltage is within the limits and the interrupt register has been read at least
once. The interrupt indicator then turns dark green.
Figure 15. AMC80 Analog Inputs
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Local Temperature
The AMC80 local temperature sensor data are displayed in degrees Celsius (°C) and has programmable
temperature limits, as indicated in Figure 16. The temperature interrupt indicators turn bright green when a
limit has been exceeded.
Figure 16. Max Temp Flag Trigger
5.2.5
Interrupt Inputs
Toggling the buttons in the Write Interrupt Inputs box shown in Figure 17 and clicking the Write all Reg
button changes the values of the interrupt inputs to the AMC80. Clicking Read all Reg reveals the status
of the interrupt registers via the Read Interrupt Inputs indicators. Note that these registers clear only once
the input returns to a false value and the register has been read. Clicking the RESET button toggles the
RST_IN interrupt to the AMC80 low for 50ms.
Figure 17. Interrupt Inputs
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5.2.6
Fan Inputs
As shown in Figure 18, the values read from the AMC80 for FAN1 count and FAN2 count are displayed in
the FAN Inputs box in units of counts (see the AMC80 data sheet for a complete description) and units of
RPM. The divisor may also be set by entering a value in the Fan1 Divisor control box or Fan2 Divisor
control box, and clicking the Write all Reg button.
Figure 18. Fan Input Indicators and Divisor Controls
5.2.7
Additional Controls
The power supply to the AMC80 may be toggled between +3.3V and +5V by toggling the Power Voltage
indicator shown in Figure 19.
Figure 19. Power-Supply Control
Additional control over the Configuration Register is provided on a bit level basis by the controls shown in
Figure 20. A bright green indicator represents an active bit, and a dark green indicator represents an
inactive bit. After toggling to the desired level, press the Write all Reg button to change the Configuration
Register.
Figure 20. Configuration Register Controls
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The Manufacturer ID and Stepping/Die Revision ID registers can be updated by entering a value into the
respective control (as shown in Figure 21) and pressing the Write all Reg button.
Figure 21. Manufacturer ID and Stepping/Die Revision ID Controls
5.2.8
Registers Tab
The Registers tab displays the individual register setting for the AMC80 sensors. For more information on
the individual registers and the bit meanings, simply highlight the desired register and hit the Help with
Reg button shown in Figure 22.
Figure 22. Registers Tab
The Registers tab also includes two dig_bits tables. The dig_bits tables allow the user to monitor and
change individual bits by highlighting the desired register and toggling the bit controls beneath it.
NOTE: Only writable register bits can be toggled.
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5.2.9
Analog Voltages Graph Tab
In Read Continuous mode, the values for each of the seven analog input channels are graphed. The most
recent value is also displayed, as Figure 23 illustrates.
Figure 23. Analog Voltages Graphs Tab
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Temperature Graph Tab
In Read Continuous mode, the value for each of the local temperature sensor on the AMC80 is plotted in
degrees Celsius. The most recent value is also displayed. Figure 24 shows the Temperature Graph tab.
Figure 24. Temperature Graph Tab
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5.2.11
FAN Inputs Graph Tab
When the Read Continuous button is enabled, the values from the FAN Input registers in the AMC80 are
read and displayed in the graphs on this tab. The graphs, as shown in Figure 25, are auto-scaled; the data
may be converted to RPMs according to the equations given in the AMC80 data sheet.
Figure 25. The FAN Inputs Graph Tab
6
AMC80EVM Documentation
This section contains the complete bill of materials and schematic diagram for the AMC80EVM.
Documentation information for the SM-USB-DIG Platform can be found in the SM-USB-DIG Platform
User’s Guide, SBOU098, available for download from the TI website at http://www.ti.com.
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AMC80EVM Documentation
6.1
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AMC80EVM Board Schematic
Figure 26 shows the schematic for the AMC80EVM board.
Figure 26. AMC80EVM Schematic
20
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6.2
AMC80EVM PCB Component Layout
Figure 27 and Figure 28 show the PCB layout of the components for the AMC80EVM board.
Figure 27. AMC80EVM PCB: Top Component Layout
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Figure 28. AMC80EVM PCB: Bottom Component Layout
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Bill of Materials
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7
Bill of Materials
Table 4 shows the parts list for the AMC80EVM.
Table 4. AMC80EVM Bill of Materials
Item
Qty
Ref Des
Value
Description
1
1
U1
AMC80
AMC80 24-Pin TSSOP
Texas Instruments
Manufacturer
AMC80
Part No
2
6
T2-T5, T7-T8
Terminal
block
(2 Position)
2-Block Terminal,
3.5mm
On Shore Technology Inc
ED555/2DS
3
1
T6
Terminal
block
(3 Position)
3-Block Terminal,
3.5mm
On Shore Technology Inc
ED555/3DS
4
1
C2
100nF
Capacitor, 0.10μF 10V
Ceramic X7R 0603
Kemet
C0603C104K8RACTU
5
1
C1
10μF
Capacitor, ceramic
10μF 6.3V X5R 0603
Kemet
C0603C106M9PACTU
6
2
GPO_LED,
INT_LED
LED
LED White high bright
ESS SMD
Panasonic—SSG
LNJ037X8ARA
2
IC I/O Expander I C 8B
Texas Instruments
20VQFN
PCF8574ARGYR
0Ω
Resistor, 0.0Ω 1/10W
0603 SMD
Stackpole Electronics Inc
RMCF0603ZT0R00
10
R5-R8,
RFAN1-RFAN2,
RGPO, RINTL,
RRST/OS, RSCK,
RSDA
4.02kΩ
Resistor, 4.02kΩ
1/10W 1% 0603 SMD
Stackpole Electronics Inc
RMCF0603FT4K02
10
10
BTI, GND, GPI,
GPO, INT INT_IN,
RESET_IN,
RST/OS, SCL,
SDA
Test point
Test Point PC Mini
0.040"D white
Keystone
TP_MINI_THM
11
1
T1
Header
(10-position)
Connector, Socket Rt
Ang 10-Pos .050
Mill-Max Manufacturing
Corp.
851-93-010-20-001000
12
4
NA
Bumpons
Bumpon Cylindrical
.375X.135 BLK
3M
SJ61A8
7
2
U2-U3
PCF8574a
8
4
R1-R4
9
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Evaluation Board/Kit Important Notice
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION
PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the
product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are
not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations,
including product safety and environmental measures typically found in end products that incorporate such semiconductor
components or circuit boards. This evaluation board/kit does not fall within the scope of the European Union directives regarding
electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the
technical requirements of these directives or other related directives.
Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30
days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY
SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING
ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all
claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to
take any and all appropriate precautions with regard to electrostatic discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER
FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive.
TI assumes no liability for applications assistance, customer product design, software performance, or infringement of
patents or services described herein.
Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the
product. This notice contains important safety information about temperatures and voltages. For additional information on TI’s
environmental and/or safety programs, please contact the TI application engineer or visit www.ti.com/esh.
No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or
combination in which such TI products or services might be or are used.
FCC Warning
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION
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can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15
of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this
equipment in other environments may cause interference with radio communications, in which case the user at his own expense
will be required to take whatever measures may be required to correct this interference.
EVM Warnings and Restrictions
It is important to operate this EVM within the input voltage range of 0V (min) to 5.5V (max) and the output voltage range of 0V
(min) to 5.5V (max).
Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are
questions concerning the input range, please contact a TI field representative prior to connecting the input power.
Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the
EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load
specification, please contact a TI field representative.
During normal operation, some circuit components may have case temperatures greater than +25°C. The EVM is designed to
operate properly with certain components above +25°C as long as the input and output ranges are maintained. These components
include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of
devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near
these devices during operation, please be aware that these devices may be very warm to the touch.
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Copyright © 2011, Texas Instruments Incorporated
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