Texas Instruments SLAU081 User manual

 
January 2002 AAP Data Acquisition (Dallas)
User’s Guide
SLAU081

IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,
enhancements, improvements, and other changes to its products and services at any time and to discontinue
any product or service without notice. Customers should obtain the latest relevant information before placing
ordersandshouldverifythatsuchinformationiscurrentandcomplete.AllproductsaresoldsubjecttoTI’sterms
and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
their products and applications using TI components. To minimize the risks associated with customer products
and applications, customers should provide adequate design and operating safeguards.
TIdoesnotwarrantorrepresentthatanylicense, eitherexpress orimplied, isgranted underanyTIpatentright,
copyright,maskworkright,orotherTIintellectualpropertyrightrelatingtoanycombination,machine,orprocess
inwhichTIproductsorservicesareused.InformationpublishedbyTIregardingthird–partyproductsorservices
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.
Use of such information may require a license from a third party under the patents or other intellectual property
of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction
of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for
such altered documentation.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that
product or service voids all express and any implied warranties for the associated TI product or service and
is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2002, Texas Instruments Incorporated

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 ONLY and is not considered by TI to
befitforcommercialuse.Assuch,thegoodsbeingprovidedmaynotbecompleteinterms
of required design-, marketing-, and/or manufacturing-related protective considerations,
including product safety measures typically found in the end product incorporating the
goods. As a prototype, this product does not fall within the scope of the European Union
directive 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 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.
Theuserassumesallresponsibilityandliabilityforproperandsafehandlingofthegoods.
Further, the user indemnifies TI from all claims arising from the handling or use of the
goods. Please be aware that the products received may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.). 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.
TIcurrentlydealswithavarietyofcustomersforproducts,andthereforeourarrangement
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.
Pleasereadthe EVMUser’s Guideand,specifically, the EVMWarningsand Restrictions
notice in the EVM User’s Guide prior to handling the product. This notice contains
important safety information about temperatures and voltages. For further safety
concerns, please contact the TI application engineer.
Personshandlingtheproductmusthaveelectronicstrainingandobservegoodlaboratory
practice standards.
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.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2002, Texas Instruments Incorporated

EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of ±12 V and the output
voltage range of ±12 V.
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.
Applyingloadsoutsideofthespecifiedoutputrangemayresultinunintendedoperationand/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.
Duringnormaloperation,somecircuitcomponentsmayhavecasetemperaturesgreaterthan
60°C.TheEVM isdesignedto operateproperlywith certaincomponentsabove 60°C aslong
astheinputandoutput rangesare maintained.Thesecomponentsincludebut arenot limited
tolinearregulators,switchingtransistors,passtransistors,andcurrentsenseresistors.These
typesof devicescanbeidentifiedusingtheEVM schematiclocated intheEVMUser’sGuide.
When placing measurement probes near these 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 75265
Copyright 2002, Texas Instruments Incorporated

Running Title—Attribute Reference
v
Chapter Title—Attribute Reference
Contents
1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 EVM Modes 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1.1 Stand-Alone Mode 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1.2 User Mode 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Analog Input Conditioning 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Analog Output Conditioning 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Prototype Area 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Getting Started 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Shipping (Default Configuration) 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Jumpers 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.1 Analog I/O Signal Conditioning 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.2 Channel 0 Analog Input 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.3 Channel 0 Analog Output 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.4 Signal Generator 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.5 Voltage Reference 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.6 ADC Supply Voltage 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.7 Clock/Timer Routing 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Switches 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.1 Stand-Alone-Mode, SW1-1 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Connectors 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 ADC and DAC Direct Access 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6 Host Communication 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.1 Common Connector 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6.2 Legacy Connector 2-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A Bill of Materials, Board Layout, and Schematics A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference
vi
Figures
2–1 SAM Configuration 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
2–1 Default Switch Settings 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–2 Default Jumper Settings 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–3 Jumper/Function Reference 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
Introduction
This chapter contains an overview of the features and functions of the EVM.
Topic Page
1.1 EVM Modes 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Analog Input Conditioning 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Analog Output Conditioning 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Prototype Area 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

EVM Modes
1-2
This user’s guide has been written to help you get the most from your
evaluation module (EVM). The TLC4541 EVM is a member of the
multipurpose(MP)familyofserialEVMs.Itprovidesaplatformtodemonstrate
the performance and functionality of the TLC4541 ADC and the
TLV5636 DAC.
TI’s websites are regularly updated. They present the latest software
additions, development information, troubleshooting help, general
background, as well as all applicable data sheets.
For specific questions related to this EVM or device send an email to the
Analog Applications Team at [email protected] and reference the
orderable tool description –TLC4541 EVM.
This user’s guide is divided into the following chapters:
-Chapter 1 offers an overview of the EVM and introduces the general
features and functions of the system.
-Chapter2describestheoperationoftheEVMfromauser’sview. Itdetails
options that can be modified, connectors used, and pinout details.
-Appendix A details the bill of materials (BOM) and the schematic, along
with explanations of certain EVM features.
1.1 EVM Modes
This EVM has been designed, tested, and shipped in a condition that enables
the user to begin evaluation with minimal effort.
There are basically two operating modes for the EVM. These modes are
mutually exclusive. They are:
-Stand-Alone Mode (SAM)
Stand-alone mode enables the user to check the system without the
support of a signal generator, pattern generator, or DSP. In this mode, the
digital output from the ADC is fed into the companion DAC and
reconstructed.
User mode is deselected if SAM is selected. The DSP will be unable to
communicate with either the ADC or the DAC.
-User Mode
The EVM typically operates via a DSP or a microprocessor. In this mode
theuserisresponsibleforgeneratingallthecontrolsignals.Ifusermodeis
selected, SAM is deselected.

Analog Input Conditioning
1-3
Introduction
1.1.1 Stand-Alone Mode
A unique feature of this EVM is the facility it offers the user to closely couple
theADCandDACwithaminimumofuserintervention.Thisfeatureallowsthe
serial bit stream from the digitized analog output to be fed directly to the DAC.
Therefore, the signal that is fed into the ADC can be reconstructed via the
DAC. No DSP need be present.
SAM is selected by:
-Switching SW1-1 to the on position, LED is on.
1.1.2 User Mode
The user can connect the ADC to a DSP or to a microprocessor in two ways:
-Via IDC ribbon cable
-Via daughterboard connectors J16 and J17
User mode is selected by:
-Switching SW1-1 to the off position, LED is off.
For example, TI’s range of DSP starter kits (DSK modules) provides a simple
low-cost solution, offering a range of DSK modules for most needs. The EVM
also supports the TMS320C6000 daughtercard specification (SPRA711), in
addition to providing support for the Motorola specification for data
transfer (SPI).
1.2 Analog Input Conditioning
There are a number of methods to connect analog input signals to the EVM.
Chapter 2 discusses these alternatives.
1.3 Analog Output Conditioning
There are a number of methods to connect analog output signals to the EVM.
Chapter 2 discusses these alternatives.
1.4 Prototype Area
An area of the PWB has been set aside if none of the signal conditioning
options provided are suitable.
The prototype area has the following features:
-A matrix of plated-through holes (PTH)
-SMT pads in a standard 14-pin JEDEC footprint
-Convenient points to pick up all power options

2-1
Getting Started
Getting Started
This chapter describes how the user can modify the various options of
this EVM.
Topic Page
2.1 Shipping (Default Configuration) 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Jumpers 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Switches 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Connectors 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 ADC and DAC Direct Access 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6 Host Communication 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2

Shipping (Default Configuration)
2-2
It is very important that users feel comfortable with the EVM from the
beginning. To achieve this, each unit is manufactured and shipped in a
predetermined condition. This allows the user to begin evaluation of the
system immediately and to have confidence that the EVM is working.
To confirm that the EVM is working properly, follow the steps below:
1) Apply power to the system. The green LED will illuminate.
2) Ensure stand-alone mode (SAM) LED is on.
3) Check TP7 via oscilloscope. This will be a sine wave.
4) Press the reset button SW3.
5) Press the start button SW2.
6) Check TP20 with an oscilloscope. If the system is working properly, the
signal at TP20 will also be a sine wave.
The system works as illustrated below. Any analog input supplied to the ADC
will be digitized and reconstructed by the DAC.
Figure 2–1.SAM Configuration
ADC
DAC
Control
Electronics DSP / Micro Interface
Data
Data
TP20
TP7
The user may probe the data and control signals to observe the signals that
allow stand-alone mode to function.
2.1 Shipping (Default Configuration)
TheEVMistestedandshippedwith jumpers and switchesinapredetermined
arrangement. This arrangement enables users to verify at once that the EVM
is working. The tables below list switch and jumper settings that the EVM
should be set to upon receipt.

Shipping (Default Configuration)
2-3
Getting Started
Table 2–1.Default Switch Settings
Switch Settings
Default
Configuration Description
SW1-1 On Stand-alone mode is selected, LED is on
SW1-2 Off Reserved
SW1-3 Off Reserved
SW1-4 Off Reserved
Table 2–2.Default Jumper Settings
Jumper Settings
Default Configuration Description
Pins 1–2Pins 2–3
W1 Inserted Not inserted Input for channel 0 is via BNC connector J1.
W2 Not inserted Inserted Sine wave test signal is selected for channel 0.
W3 Not inserted Inserted Sine wave test signal is output for channel 0.
W4 Not inserted Inserted Onboard conditioned input for channel 0 is selected.
W5 Not populated Not populated
W6 Not populated Not populated
W7 Not populated Not populated
W8 Not populated Not populated
W9 Not inserted Disables onboard sine and triangle wave generator
W10 Inserted Not inserted SCLK routed to ADC
W11 Not inserted Inserted Signal conditioning output selected for channel 0
W12 Inserted Not inserted FS routed to ADC
W13 Not Inserted 5-V analog
W14 Inserted EVM reference or DAC’s on-chip reference selected.
W15 Not populated Not populated
W16 Inserted Not inserted Selects internal or external reference
W17 Inserted Not inserted Determines EVM reference voltage
W18 Not inserted Inserted FS routed to DAC
W19 Inserted Not inserted Selects source of signal conditioning output from DAC
W20 Not inserted
W21 Inserted Not inserted
These jum
p
ers determine various o
p
tions for su
pp
lying system
W22 Inserted Not inserted
Th
ese
j
umpers
d
e
t
erm
i
ne var
i
ous op
ti
ons
f
or supp
l
y
i
ng sys
t
em
clock. This has been designed to be as flexible as possible to
W23 Inserted Not inserted
clock.
This
has
been
designed
to
be
as
flexible
as
ossible
to
accommodate many potential options.
W24 Not inserted
W25 Not populated Not populated
Thehardware that canbereconfiguredfalls into oneofthefollowing sections:
-Jumpers
-Switches
-Connectors

Jumpers
2-4
2.2 Jumpers
The table below lists the functions that users can reconfigure along with the
shipping condition.
Table 2–3.Jumper/Function Reference
Function Reference Designator Subsection
Channel 0
Analog input W1, W11, W4, W2, W3 3.2.3
Analog output W14, W19, W18 3.2.4
Disable onboard signal generator W9 3.2.7
Voltage reference W16, W17 3.2.8
3.3-V/5-V analog supply select W13 3.2.9
Clock/timer routing W20, W21, W22, W23, W24 3.2.10
2.2.1 Analog I/O Signal Conditioning
The TLC4541 supports various signal conditioning configurations.
The user has the following options:
-Bypass signal conditioning
-Use the onboard signal conditioning. This consists of an operational
amplifier for each input channel configured with a gain of 1.
-Use the prototype area for signal conditioning.
-Use the expansion connector via a TI universal operational amplifier
evaluation module (such as SLOP224/SLOP249).
2.2.2 Channel 0 Analog Input
This is the primary analog input and can always be connected externally.
Analog Input Configuration Channel 0
Reference
Designator Functional Description
W1 W1 allows the user to select between an analog input via BNC –J1 or IDC –J4 pin 1.
W11 W11 allows selection of either the conditioned or nonconditioned analog input signal.
W4 W4 allows the user to select either the prototype area output or the output from W11.
W2 W2 enables the user to select either the output from the expansion connector or the output
from the onboard signal generator.
W3 W3 completes the selection choices for channel 0 by determining if the output from W2 or W4
is chosen to be presented to the ADC.

Jumpers
2-5
Getting Started
2.2.3 Channel 0 Analog Output
With a one-channel DAC installed, this signal is the primary analog output
(output A).
With a two-channel DAC installed, the pinout of these devices effectively
resolves this channel to be the secondary analog output (output B).
Analog Input Configuration Channel 0
Reference
Designator Functional Description
W19 This jumper selects the source for the analog output on channel 0.
When a jumper is installed between pins 1 and 2, the output from the expansion connector’s
B-channel is routed out.
When the jumper is installed between pins 2 and 3, the output from the onboard signal
conditioning is directed through channel 0.
2.2.4 Signal Generator
Signal Generator
Reference
Designator Functional Description
W9 W9controlsthe generationofboth onboardtest signals.Ajumper installedbetweenpins 1and2
disables the waveform generator.
2.2.5 Voltage Reference
Voltage Reference
Reference
Designator Functional Description
W16 W16 selects either the onboard reference or an external reference supplied by the user.
W17 W17 allows the user to vary the reference voltage.
W14 There are a number of possible DACs that a user can install on this EVM. Some have an internal
reference that the user can select via software, and some do not have aninternalreference. For
the DACs that support an internal reference, it is important to have the facility to remove the
external reference supplied by the EVM (or user) to avoid conflicts between the DAC’s internal
reference and the external reference.
2.2.6 ADC Supply Voltage
ADC Supply Voltage
Reference
Designator Functional Description
W13 This jumper controls the analog supply voltage.
When the jumper is installed, the supply voltage to the ADC is 3.3 V.
When the jumper is not installed, the supply voltage to the ADC is 5 V.

Switches
2-6
2.2.7 Clock/Timer Routing
A variety of options are available to the user. Be careful about altering these.
Clock/Timer Routing
Reference
Designator Functional Description
W21 This jumper defines the clock that the ADC and DAC use for all their timing. The user can select
either the output from W23 or the output from W22 to be the base clock for the system.
W23 Thisjumperallowstheusertoselecteitheranexternalclock,ortheonboard20-MHzoscillatorfor
conversion. In addition, this signal is fed to W20.
W20 W20 provides a route for the EVM to generate CLKS for a DSP if so desired.
W22 This jumper enables the user to select either the transmit clock from a DSP, or the output
from W24.
W24 W24 connects or isolates the timer output from a DSP.
2.3 Switches
There are three switches present on the EVM:
-One 8-pin DIL switch which houses four individual switches; these are
denoted SW1-1, SW1-2, SW1-3, and SW1-4.
-Two momentary push-button switches
Features and functions of each switch:
Reference
Designator Function Default Condition
SW1-1 Selectseither stand-alonemode(SAM)orusermode SAM
SW1-2 Reserved
SW1-3 Reserved
SW1-4 Reserved
2.3.1 Stand-Alone-Mode, SW1-1
SW1-1 chooses either stand-alone mode or user mode. If the switch is set to
the off position, SAM is selected and the EVM ignores all signals generated
by a DSP. In addition, the EVM will not output any signals to a DSP or
microprocessor.
In this mode, SW2 and SW3 are used to reset the EVM’s logic and initiate
automatic conversions from the ADC, in addition to automatically routing the
serial bit stream from the ADC to the DAC for reconstruction.
Reference
Designator Function
SW2 Initiates ADC and DAC conversions in SAM
SW3 Forces the EVM’s control logic into a known state

Connectors
2-7
Getting Started
If SW1-1 is set to the on position, user mode is selected. In this case the user
hasabsolutecontrolofthedataandcontrolsignalsfortheADCandDAC.With
SW1-1 in the on position, the logic that generates the control for SAM is
disabled and plays no active part in the process.
2.4 Connectors
In addition to jumpers and switches, the user also has access to various
connectors. This section details the pinout of each connector.
Reference
Designator Description
J1 Analog input option for channel 0, miniature BNC
Cells in grey are not supported (tracked) directly by this EVM.
Reference
Designator Description Pin Number Function
J3 Analog input option 1Noninverting input signal to dual operational amplifier, (2)
g
for universal
o
p
erational-am
p
lifier
2Noninverting input signal to dual operational amplifier, (2)
opera
ti
ona
l
-amp
lifi
er
evaluation board, SIL 3Inverting input signal to dual operational amplifier, (2)
evaluation
board
,
SIL
PTH not installed. 4Inverting input signal to dual operational amplifier, (2)
5Nonfiltered output from dual operational amplifier, (2)
6Filtered output from dual operational amplifier, (2)
7+V supply
8Operational amplifier (2) shutdown signal
9Reference voltage
10 Analog ground
11 Operational amplifier (1) shutdown signal
12 –V supply
13 Nonfiltered output from dual operational amplifier, (1)
14 Filtered output from dual operational amplifier, (1)
15 Noninverting input signal to dual operational amplifier, (1)
16 Noninverting input signal to dual operational amplifier, (1)
17 Inverting input signal to dual operational amplifier, (1)
18 Inverting input signal to dual operational amplifier, (1)

Connectors
2-8
Reference
Designator Description Pin Number Function
J4 Analog input option, 26-pin 1Channel 0 input
g,
DIL header 2 AGND
3Channel 1 input
4 AGND
5Not connected
6 AGND
7Not connected
8 AGND
9Not connected
10 AGND
11 Not connected
12 AGND
13 Not connected
14 AGND
15 Not connected
16 AGND
17 Not connected
18 AGND
19 Not connected
20 AGND
21 Not connected
22 AGND
23 Not connected
24 AGND
25 External reference voltage
26 AGND
Reference
Designator Description
J5 Analog output for one-channel DAC

Connectors
2-9
Getting Started
Reference
Designator Description Pin
Number Function
J7 EVM power 15 V
2–12 V
30 V
412 V
J8 Analog output option, 1No output
g,
26-pin DIL header 2 AGND
3Analog output for one-channel DAC
4 AGND
5Not connected
6 AGND
7Not connected
8 AGND
9Not connected
10 AGND
11 Not connected
12 AGND
13 Not connected
14 AGND
15 Not connected
16 AGND
17 Not connected
18 AGND
19 Not connected
20 AGND
21 Not connected
22 AGND
23 Not connected
24 AGND
25 Not connected
26 AGND

Connectors
2-10
Reference
Designator Description Pin Number Function
J9 Analog input option 1Noninverting input signal to dual operational amplifier, (2)
g
for universal
o
p
erational-am
p
lifier
2Noninverting input signal to dual operational amplifier, (2)
opera
ti
ona
l
-amp
lifi
er
evaluation board, SIL 3Inverting input signal to dual operational amplifier, (2)
evaluation
board
,
SIL
PTH not installed. 4Inverting input signal to dual operational amplifier, (2)
5Nonfiltered output from dual operational amplifier, (2)
6Filtered output from dual operational amplifier, (2)
7+V supply
8Operational amplifier (2) shutdown signal
9Reference voltage
10 Analog ground
11 Operational amplifier (1) shutdown signal
12 –V supply
13 Nonfiltered output from dual operational amplifier, (1)
14 Filtered output from dual operational amplifier, (1)
15 Noninverting input signal to dual operational amplifier, (1)
16 Noninverting input signal to dual operational amplifier, (1)
17 Inverting input signal to dual operational amplifier, (1)
18 Inverting input signal to dual operational amplifier, (1)

ADC and DAC Direct Access
2-11
Getting Started
2.5 ADC and DAC Direct Access
J10andJ11 offerusersthefacilitytodirectlyinspectthe digital signals coming
from and going to the ADC and DAC.
Reference
Designator Description Pin Number Signal
J10 Allows the user direct access to all digital signals for the ADC 1Digital ground
gg
2 SDO
3Digital ground
4 SCLK
5Digital ground
6 CS or CS/FS
7Digital ground
8 FS
J11 Allows the user direct access to all digital signals for the DAC 1Digital ground
gg
2 SDI
3Digital ground
4 SCLK
5Digital ground
6 CS
7Digital ground
8 FS
2.6 Host Communication
There are two ways to connect a host system (DSP/microprocessor):
-Texas Instruments’new DSKs provide two dedicated 80-pin connectors.
The EVM can be plugged directly onto these DSKs. This connector
standard is referred to as the common connector.
-Legacy DSKs not equipped with the 80-pin common connectors will
communicate via the daisy-chained legacy header.
The following sections discuss each connection method.