Texas Instruments DAC7554 User manual

DAC7554 Evaluation Module
User's Guide
Literature Number: SLAU154March 2005

2 SLAU154 – March 2005

Contents
1 EVM Overview ............................................................................................................ 51.1 Features .............................................................................................................. 51.2 Power Requirements ............................................................................................... 51.3 EVM Basic Functions............................................................................................... 62 PCB Design and Performance ...................................................................................... 72.1 PCB Layout ......................................................................................................... 73 Bill of Materials ......................................................................................................... 114 EVM Operation .......................................................................................................... 124.1 Factory Default Setting ........................................................................................... 124.2 Host Processor Interface ......................................................................................... 134.3 EVM Stacking ...................................................................................................... 134.4 The Output Operational Amplifier ............................................................................... 134.5 Jumper Setting ..................................................................................................... 154.6 Schematics ......................................................................................................... 165 Related Documentation From Texas Instruments .......................................................... 175.1 Questions About This or Other Data Converter EVMs? ..................................................... 17Trademarks .............................................................................................................. 17
Important Notices ............................................................................................................... 18
Table of ContentsSLAU154 – March 2005 3

List of Figures
1 EVM Block Diagram ......................................................................................................... 72 Top Silkscreen ............................................................................................................... 83 Top Layer (Signal and Split Ground Plane) .............................................................................. 84 Bottom Layer (Signal and Split Ground Plane) .......................................................................... 95 Bottom Silkscreen ........................................................................................................... 96 Drill Drawing ................................................................................................................ 107 Factory Default Jumper Setting .......................................................................................... 12
List of Tables
1 Parts List .................................................................................................................... 112 Factory Default Jumper Setting .......................................................................................... 123 DAC Output Channel Mapping ........................................................................................... 134 Unity Gain Output Jumper Settings ...................................................................................... 145 Gain of Two Output Jumper Settings .................................................................................... 146 Jumper Settings to Add an Offset to the Output Op-amp ............................................................. 147 Jumper Setting Function .................................................................................................. 15
List of Figures4 SLAU154 – March 2005

1 EVM Overview
1.1 Features
1.2 Power Requirements
User's GuideSLAU154 – March 2005
DAC7554EVM
This user’s guide describes the characteristics, operation, and the use of the DAC7554evaluation module. It covers all pertinent areas involved to properly use this EVM boardalong with the devices that it supports. The physical PCB layout, schematic diagramand circuit descriptions are included.
This section gives a general overview of the DAC7554 evaluation module (EVM), and describes some ofthe factors that must be considered in using this module.
This EVM features the DAC7554 digital-to-analog converter (DAC). The DAC7554 EVM is a simpleevaluation module designed for a quick and easy way to evaluate the functionality and performance of the12-bit resolution, quad-channel and serial input DAC. This EVM features an ultralow glitch voltage outputwith great linearity and monotonicity. The serial interface of this DAC can communicate with any hostmicroprocessor or TI DSP base system.
The following sections describe the power requirements of this EVM.
1.2.1 Supply Voltage
The dc power supply requirement for this DAC7554 EVM (VDD) is selectable between 3.3 V and 5 V viaW1 jumper header. The 3.3 V comes from J6-8 or J5-1 (if installed), and the 5 V comes from J6-3 or J5-3terminals (if installed), when plugged in via 5-6k interface card or the HPA449. These power supplyvoltages are referenced to ground through the J6-6 terminal. The V
CC
and V
SS
are only used by U2operational-amplifier, which ranges from 15 V to -15 V maximum and connects through J1-3 and J1-1respectively (if installed), or through J6-1 and J6-2 terminals. All the analog power supplies are referencedto analog ground through J1-2 and J6-6 terminals.
The negative rail of the output operational-amplifier, U2, can be selected between V
SS
and AGND via W5jumper. The external operational-amplifier is installed as an option to provide output signal conditioning orfor other output mode requirement desired.
CAUTIONTo avoid potential damage to the EVM board, make sure that the correctcables are connected to their respective terminals as labeled on the EVMboard.
Stresses above the maximum listed voltage ratings may cause permanentdamage to the device.
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1.3 EVM Basic Functions
EVM Overview
1.2.2 Reference Voltage
The 4.096-V precision voltage reference is provided to supply the external voltage reference and sets thevoltage output range of the DAC under test through REF3140, U3, via jumper W4 by shorting pins 1 and2. The test point TP4 as well as J4-20 are also provided to allow the user to connect to other externalreference source if the onboard reference circuit is not desired. The external voltage reference should notexceed the applied power supply, V
DD
, of the DAC under test.
The REF3140 precision reference is powered by +5VA through J6-4 or J5-3 (if installed) terminal.
CAUTIONWhen applying an external voltage reference through TP4 or J4-20, makesure that it does not exceed the DAC7554 power supply (V
DD
) maximum.Otherwise, this can permanently damage the DAC7574, U1, device undertest.
The DAC7554 EVM is designed primarily as a functional evaluation platform to test certain functionalcharacteristics of the DAC7554 DAC. Functional evaluation of the DAC device can be accomplished withthe use of any microprocessor, TI DSP or some sort of a waveform generator.
The headers J2 and P2 are the connectors provided to allow the control signals and data required tointerface a host processor or waveform generator to the DAC7554 EVM using a custom built cable.
An adapter interface card (5-6k adapter interface) is also available to fit and mate with TI’sTMS320C5000™ and TMS320C6000™ DSP Starter Kit (DSK). This alleviates the hassle involved inbuilding a custom cable. In addition, there is also an MSP430 based platform (HPA449) that uses theMSP430F449 microprocessor, with which this EVM can connect and interface. For more details orinformation regarding the 5-6k adapter interface card or the HPA449 platform, call Texas Instruments orsend email to [email protected].
The DAC outputs can be monitored through the selected pins of J4 header connector. All the outputs canbe switched through their respective jumpers W2, W11, W12 and W13, for the reason of stacking.Stacking allows a total of eight DAC channels to be used provided that the SYNC signal is unique for eachEVM board stacked. The SYNC signal must be decoded for the specific EVM, therefore, the decodershould be implemented but can only be done externally from the EVM board.
In addition, the option of selecting one DAC output that can be fed to the noninverting side of the outputoperational-amplifier, U2, is also possible by using a jumper across the selected pins of J4. If two EVMsare stacked together, the output operational-amplifier's noninverting input, are shorted together at the J4header. Alterations to the traces are necessary to use the U2 features. The traces for J4-1, J4-3, J4-5,and J4-7 are visible from the topside of the EVM. However, one issue still remains, the trace to thenoninverting pin of U2 cannot be seperated from J4-1. Therefore, only one of the stacked EVMs can beused with the U2 feature. Finally, the output operational-amplifier, U2, must first be configured correctly forthe desired waveform characteristic to be seen. See section 4 of this user’s guide.
A block diagram of the EVM is shown below in the Figure 1 .
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VCC
VDD
VOUT
REFIN
TP4
DAC Out
TP3
Output
Buffer
Module
TP2
R14
(J1)
(J5)
(J6)
(P6)
(J2)
(P2)
(J4)
(P4)
VSS
VSS
W1
W2
4 CH
8 CH#
W7
W3
W5
W2
W11
W12
W13
DIN
SCLK
SYNC
VCC
VSS
GND
GND
GND
DAC Module*
External
Reference
Module
*DAC module features the DAC7554.
# Up to 8 channels can be checked when 2 EVMs are stacked.
+5VA
+5VA +3.3VA
+3.3VA
2 PCB Design and Performance
2.1 PCB Layout
PCB Design and Performance
Figure 1. EVM Block Diagram
This section covers the layout design of the PCB; thereby, describing the physical and mechanicalcharacteristics of the EVM. The list of components used on the module is also included in this section.
The DAC7554 EVM is designed to preserve the performance quality of the DAC, device under test, asspecified in the data sheet. Carefully analyzing the EVM’s physical restrictions and the given or knownelements that contributes to the EVM’s performance degradation is the key to a successful designimplementation. These attributes that diminish the performance of the EVM can be addressed during theschematic design phase, by properly selecting the right components and building the circuit correctly. Thecircuit should include adequate bypassing, identifying and managing the analog and digital signals andknowing or understanding the components mechanical attributes.
The obscure part of the design is the layout process where lack of knowledge and inexperience can easilypresent a problem. The main concern here is primarily with the placement of components and the properrouting of signals. The bypass capacitors should be placed as close as possible to the pins and the analogand digital signals should be properly separated from each other. The power and ground plane is veryimportant and should be carefully considered in the layout process. A solid plane is ideally preferred butsometimes impractical, so when solid planes are not possible, a split plane does the job as well. Whenconsidering a split plane design, analyze the component placement and carefully split the board into itsanalog and digital sections starting from the device under test. The ground plane plays an important role incontrolling the noise and other effects that otherwise contributes to the error of the DAC output. To ensurethat the return currents are handled properly, route the appropriate signals only in their respectivesections, meaning the analog traces should only lay directly above or below the analog section and thedigital traces in the digital section. Minimize the length of the traces but use the biggest possible tracewidth allowable in the design. These design practice discussed can be seen in the following figurespresented below.
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PCB Design and Performance
The DAC7554 EVM board is constructed on a two-layer printed-circuit board using a copper-clad FR-4laminate material. The printed-circuit board has a dimension of 43,1800 mm (1.7000 inch) × 81,2800 mm(3.200 inch), and the board thickness is 1,5748 mm (0.0620 inch). Figures 2 through 6 show the individualartwork layers.
Figure 2. Top Silkscreen
Figure 3. Top Layer (Signal and Split Ground Plane)
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PCB Design and Performance
Figure 4. Bottom Layer (Signal and Split Ground Plane)
Figure 5. Bottom Silkscreen
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PCB Design and Performance
Figure 6. Drill Drawing
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3 Bill of Materials
Bill of Materials
Table 1. Parts ListItem QTY. Designators Description Manufacturer MFG. Part No.
1 2 C1, C2 0.1 µF, CAP 25 V, ceramic chip, 0603 SMD TDK C1608X7R1E104KT
2 2 C9, C10 0.01 µF, CAP 25 V, ceramic chip, 0603 SMD TDK C1608COG1E103KT
3 1 C12 1 nF, CAP 25 V, ceramic chip, 0603 SMD TDK C1608COG1E102KT
4 1 C3 0.47 pF, CAP 50 V, ceramic chip, 1206 SMD TDK C3216X7R1H474KT
5 1 C5 10 µF, CAP 25 V, ceramic chip, 1210 SMD TDK C3225X7R1E106KT
6 2 R6, R12 10K Panasonic ERJ-8ENF1002V
7 1 R14 10K POT Bourns 3214W-1-103E
8 7 R8, R15 0 Ω
(1)
Panasonic ERJ-8GEY0R00VR16, R17R21, R22, R25
9 1 R24 100 ΩPanasonic ERJ-8GEYJ101V
10 2 J2, J4 20 PIN_IDC Samtec TSM-110-01-S-DV-M
11 1 J6 10 PIN_IDC Samtec TSM-105-01-T-DV
12 2 J1, J3 3-Pin terminal connector
(2)
On-Shore Tech. ED555/3DS
13 2 P2, P4 20-Pin_IDC
(3)
Samtec SSW-110-22-S-DVS-P
14 1 P6 10-Pin Isolated Power Socket, 0.100
(3)
Samtec SSW-105-22-F-DVS-K
15 5 TP2, TP3, TP4, TP_TURRENT Mill-Max 2348-2-01-00-00-07-0TP5, TP6
16 1 U2 8-SOP(D) High Precision OP-Amp MSOP-10(DGS) Texas Instruments OPA277UA
17 1 U1 DAC7554, 12-Bit, 4-CH, SPI Texas Instruments DAC7554
18 1 U3 4.096V VOLTAGE REFERENCE SOT23-3 Texas Instruments REF3140AIDBZT
19 2 W4, W7 2 CIRCUIT HEADER, 0.100 STRAIGHT Molex 22-03-2021
20 8 W1, W2, W3, 3 CIRCUIT HEADER, 0.100 STRAIGHT Molex 22-03-2031W5, W6, W11,W12, W13
(1)
R21, R22, and R25 are not populated (1206 footprint).(2)
J1 and J3 are optional terminals and are not installed.(3)
P2, P4, and P6 parts are not shown in the schematic diagram. All the P designated parts are installed in the bottom side of thePC board opposite the Jdesignated counterpart. Example, J2 is installed on the topside while P2 is installed in the bottom sideopposite of J2.
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4 EVM Operation
4.1 Factory Default Setting
EVM Operation
This section covers in detail the operation of the EVM to provide guidance to the user in evaluating theonboard DAC and how to interface the EVM to a specific host processor.
Refer to the DAC7554 data sheet, SLAS399A , for information about its serial interface and other relatedtopics.
The EVM board is factory tested and configured to operate in the unipolar output mode.
The EVM board is set to its default configuration from factory as described on the table below to operatein unipolar mode of operation. The jumper configuration is shown on figure 7 for clarity.
Table 2. Factory Default Jumper Setting
Reference Jumper FunctionPosition
W1 2-3 Analog supply for the DAC7554 is +5VA.W2 1-2 DAC output A (V
OUT
A) is routed to J4-2.W3 OPEN External operational-amplifier, U2, is in unity gain configuration.W4 CLOSED Onboard external reference, U3, is routed to V
ref
.W5 1-2 Negative supply rail of U2 Op-Amp is supplied with V
SS
.W6 2-3 CS signal from J2 is routed through to drive the SYNC signal.W7 OPEN External reference source from J2-20 is not connected.W11 1-2 DAC output B (V
OUT
B) is routed to J4-4.W12 1-2 DAC output C (V
OUT
C) is routed to J4-6.W13 1-2 DAC output D (V
OUT
D) is routed to J4-8.DAC output A (V
OUT
A) is connected to the noninverting input of the output operational-amplifier,J4 1-2
U2.
Figure 7. Factory Default Jumper Setting
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4.2 Host Processor Interface
4.3 EVM Stacking
4.4 The Output Operational Amplifier
EVM Operation
The host processor will basically drive the DAC, so the DACs proper operation depends on the successfulconfiguration between the host processor and the EVM board. In addition, a properly written code is alsorequired to operate the DAC.
A custom cable can be made specific to the host interface platform. The EVM allows interface to the hostprocessor through J2 header connector for the serial control signals and the serial data input. The outputcan be monitored through the J4 header connector.
An interface adapter card is also available for specific TI DSP starter kit as well as an MSP430 basedmicroprocessor as mentioned in chapter 1 of this manual. Using the interface card alleviates the tedioustask of building customize cables and allows easy configuration of a simple evaluation system.
The DAC7554 interfaces with any host processor capable of handling serial communication protocols orthe popular TI DSP. For more information regarding the DAC7554 data interface, please refer to the datasheet (SLAS399A ).
The stacking of EVM is possible if there is a need to evaluate two DAC7554 to yield a total of eightchannel output. A maximum of two EVMs are allowed since the output terminal, J4, dictates the number ofDAC channels that can be connected without colliding. Table 3 shows how the DAC output channels aremapped into the output terminal, J4, with respect to the jumper position of W2, W11, W12 and W13.
Table 3. DAC Output Channel Mapping
Reference Jumper Position Function
1-2 DAC output A (V
OUT
A) is routed to J4-2.W2
2-3 DAC output A (V
OUT
A) is routed to J4-10.1-2 DAC output B (V
OUT
B) is routed to J4-4.W11
2-3 DAC output B (V
OUT
B) is routed to J4-12.1-2 DAC output C (V
OUT
C) is routed to J4-6.W12
2-3 DAC output C (V
OUT
C) is routed to J4-14.1-2 DAC output D (V
OUT
D) is routed to J4-8.W13
2-3 DAC output D (V
OUT
D) is routed to J4-16.
To allow exclusive control of each EVM when they are stacked together, each DAC7554 EVM must haveits own unique SYNC signal. This is accomplished by implementing a decoder externally from the EVMboard or the µC or DSP can generate each specific SYNC signal for the appropriate EVM board in thestack. These specific SYNC signals that comes into J2-1 and J2-7 must be selected via the jumper W6 ofeach EVM board.
The EVM includes an optional signal conditioning circuit for the DAC output through an externaloperational amplifier, U2. Only one DAC output channel can be monitored at any given time for evaluationsince the odd numbered pins (J4-1 to J4-7) are tied together. When the EVM board outputoperational-amplifier is used, the traces must be properly cut. The traces are visible on the edge of theEVM from the topside where the J4 header is assembled. The pin J4-1 on the EVM should not be usedand should be left open because all the traces come to this point. This provides three other options (i.e.,J4-3, J4-5, and J4-7) that can be used for signal routing and the other two unused traces should be cut.This option does not apply when stacking two EVMs, see section 1.3.
Nevertheless, the raw outputs of the DAC can be probed through the even pins of J4, the output terminal,which also provides mechanical stability when stacking or plugging into any interface card. In addition, itprovides easy access for monitoring up to eight DAC channels when stacking two EVMs together. Seesection 4.3.
The following sections describes the different configurations of the output amplifier, U2.
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EVM Operation
4.4.1 Unity Gain Output
This is the default configuration that the EVM is set to from the factory. The buffered output configurationcan be used to prevent loading the DAC7554 though it may present some slight distortion because of thefeedback resistor and capacitor. The user can tailor the feedback circuit to closely match their desiredwave shape by simply desoldering R7 and C11 and replacing it with the desired values. You can alsosimply get rid of R7 and C11 altogether and just solder a zero ohm resistor in replacement of R7, ifdesired.
Table 4 shows the jumper setting for the unity gain configuration of the DAC external output buffer inunipolar or bipolar mode.
Table 4. Unity Gain Output Jumper Settings
Jumper SettingReference FunctionUnipolar Bipolar
Disconnect R12 (gain resistor) or any signals attached in TP2 from the inverting inputW3 OPEN OPEN
of the operational-amplifier.W5 2-3 1-2 Supplies V
SS
to the negative rail of operational-amplifier or ties it to AGND.
4.4.2 Output Gain of Two
Table 5 shows the proper jumper settings of the EVM for the 2× gain output of the DAC.
Table 5. Gain of Two Output Jumper Settings
Jumper SettingReference FunctionUnipolar Bipolar
Inverting input of the output operational-amplifier, U2, is connected to the gain resistorW3 1-2 1-2
R12.
Supplies power, V
SS
, to the negative rail of operational-amplifier, U2, for bipolarW5 2-3 1-2
mode, or ties it to AGND for unipolar mode.
4.4.3 Adding an Offset to the Output Operational-Amplifier
Another output configuration option is the capability to add an offset to the inverting input of the outputoperational-amplifier, U2. This is done by applying a voltage source into TP2 and adjusting the variablepot to the desired offset level. Table 6 shows the jumper setting configuration for adding an offset voltage.
Table 6. Jumper Settings to Add an Offset to the Output Op-amp
Jumper SettingReference FunctionUnipolar Bipolar
The offset voltage source is connected to the inverting input of the outputW3 2-3 2-3
operational-amplifier, U2.Supplies power, VSS, to the negative rail of operational-amplifier, U2, for bipolarW5 2-3 1-2
mode, or ties it to AGND for unipolar mode.
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4.5 Jumper Setting
13
13
13
13
13
13
13
13
13
13
13
EVM Operation
Table 7 shows the function of each specific jumper setting of the EVM.
Table 7. Jumper Setting Function
Reference Jumper FunctionSetting
3.3-V analog supply is selected for DUT V
DD
.
W1
5-V analog supply is selected for DUT V
DD
.
Routes V
OUT
A to J4-2.
W2
Routes V
OUT
A to J4-10.
Connects the gain resistor, R12, to the inverting input of the output operational-amplifier, U2. Usefor 2x gain configuration.
W3 Configures the output operational-amplifier, U2, for unity gain.
Connects any voltage source applied to TP2 to the inverting input of the output oper-ational-amplifier, U2 for offsetting intentions.
Routes the onboard 4.096-V reference to the V
ref
input of the DAC7554.
W4
Disconnects the onboard +4.096V reference from the V
ref
input of the DAC7554 and allows otherexternal reference source to be applied via TP4 or J4-20 (with W7 closed).
Negative supply rail of the output operational-amplifier, U2, is powered by V
SS
for bipolaroperation.
W5
Negative supply rail of the output operational-amplifier, U2, is tied to AGND for unipolar operation.
FSX signal from J2-7 is routed through to control the SYNC function of the DAC7554. Normallyused for DSP operation.
W6
CS signal from J2-1 is routed through to control the SYNC function of the DAC7554. Normallyused for µC operation.
Disconnects the external reference source from J4-20 to the V
ref
input of the DAC7554 and allowsother external reference source to be applied via TP4 or from the onboard reference (with W4closed).W7
Routes the external reference source from J4-20 to the V
ref
input of the DAC7554.
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13
13
13
13
13
13
4.6 Schematics
EVM Operation
Table 7. Jumper Setting Function (continued)
Reference Jumper FunctionSetting
Routes V
OUT
B to J4-4.
W11
Routes V
OUT
B to J4-12.
Routes V
OUT
C to J4-6.
W12
Routes V
OUT
C to J4-14
Routes V
OUT
D to J4-8.
W13
Routes V
OUT
D to J4-16.
Legend: Indicates the corresponding pins that are shorted or closed.
The DAC7554 schematics are shown on the following page.
DAC7554EVM 16 SLAU154 – March 2005

A
B
C
D
D
C
B
Ati
12500 TI Boulevard. Dallas, Texas 75243
Title:
SHEET: OF:
FILE: SIZE:
DATE:
REV:
14-Feb-2005
Drawn By:
Engineer:
Revision History
REV ECN Number Approved
DAC7554 Rev A.Sch
DOCUMENTCONTROL #
+5VA
R6
10K
VSS
2
3
6
4
71
5
U2
Op Amp
VCC
R12
10K
W5
R8
0
VCC +3.3VA
12 34 56 78 910 1112 1314 1516 1718 1920
J4
OUTPUT HEADER
FSX
C5
10µF
DAC7554 EVM
A
J. PARGUIAN
VSS
+REFin
1
CLKX
DX
CLKR
FSR
DR
R15 0
R16 0
-REFin
W2
OUT_A1
OUT_C1
OUT_B1
OUT_D1
OUT_A2
OUT_B2
OUT_C2
OUT_D2
OUT_A
OUT_B
OUT_C
OUT_D
TP3
VOUT
U2_+IN
U2_-IN
U2_OUT
1 2
3 4
5 6
7 8
910
11 12
13 14
15 16
20
17
19 18
J2
Serial Header
TP4
VCC = +15V Analog Max
VDD = +2.7V to +5.5V Digital Max
VSS = 0V to -15V Analog Max
1 2 3
J1 DNP
1 2 3
J5 DNP
+5VA
VCC
1 2
3 4
5 6
7 8
910
J6
VSS+5VA -5VA +5VD+3.3VD+1.8VD +3.3VA
GPIO0
GPIO1
SCL
SDA
GPIO2
GPIO3
GPIO4
GPIO5
W1
Vana
W11
W12
W13
+3.3VA
W6
TP2
TP5 TP6
R17 0
DIN
SCLK
R21
DNP
SYNC
+VREF
+VREF
R22
DNP
W3
1
2
3
R14
10K
R24
100
R25
DNP
1
VoutB 2
REFin
10
GND
3
VoutA 1
SYNC
9
VoutD 5
DIN
7
SCLK
6
VDD
8
VoutC 4
U1
DAC7554
CS
OUT 2
GND
3IN 1
U3
REF3140
+5VA
FS
DX
CLKX
W4
W7
U3_OUT
Notes:
DNP = Do Not Populate
C1
0.1µF
C2
0.1µF
C9
0.01µF
C10 0.01µF
C12
1nF
C3
0.47µF
6468690

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5 Related Documentation From Texas Instruments
5.1 Questions About This or Other Data Converter EVMs?
Trademarks
Related Documentation From Texas Instruments
To obtain a copy of any of the following TI documents, call the Texas Instruments Literature ResponseCenter at (800) 477–8924 or the Product Information Center (PIC) at (972) 644–5580. When ordering,identify this manual by its title and literature number. Updated documents can also be obtained throughour website at www.ti.com.
Data Sheets: Literature Number:DAC7554 SLAS399AREF3140 SBVS046AOPA277 SBOS079
If you have questions about this or other Texas Instruments Data Converter evaluation modules, feel freeto e-mail the Data Converter Application Team at [email protected]. Include in the subjectheading the product you have questions or concerns with.
TMS320C5000, TMS320C6000 are trademarks of Texas Instruments.
DAC7554EVMSLAU154 – March 2005 17

EVM IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLYand is not considered by TI to be fit for commercial use. As such, the goods being provided may not be complete in terms ofrequired design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typicallyfound in the end product incorporating the goods. As a prototype, this product does not fall within the scope of the European Uniondirective on electromagnetic compatibility and therefore may not meet the technical requirements of the directive.Should this evaluation kit not meet the specifications indicated in the EVM User's Guide, the kit may be returned within 30 daysfrom the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLERTO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANYWARRANTY 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 allclaims arising from the handling or use of the goods. Please be aware that the products received may not be regulatory compliantor agency certified (FCC, UL, CE, etc.). Due to the open construction of the product, it is the user's responsibility to take any and allappropriate precautions with regard to electrostatic discharge.EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE Liable to the other FORANY 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 ofpatents or services described herein.
Please read the EVM User's Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM User's Guide prior tohandling the product. This notice contains important safety information about temperatures and voltages. For further safetyconcerns, please contact the TI application engineer.Persons handling the product must have electronics training and observe good laboratory practice standards.No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, orcombination in which such TI products or services might be or are used.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265Copyright © 2004, Texas Instruments Incorporated
EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of 3.3 V to 5 V and the output voltage range of 0 V to 5 V.Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there arequestions 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 theEVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the loadspecification, please contact a TI field representative.During normal operation, some circuit components may have case temperatures greater than 85 °C. The EVM is designed tooperate properly with certain components above 85 °C as long as the input and output ranges are maintained. These componentsinclude but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types ofdevices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes nearthese devices during operation, please be aware that these devices may be very warm to the touch.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265Copyright © 2004, Texas Instruments Incorporated

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