Texas Instruments TLC4541EVM User manual

TLC4541/5EVM, TLC3541/5EVM,
TLC2551/2/5EVM AND
TLV2541/2/5EVM
March 2003 Data Acquisition Products
User’s Guide
SLAU103

IMPORTANT NOTICE
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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
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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.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,
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Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2003, 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 be fit for commercial use. As such, the goods being provided
may not be complete in terms 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.
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. 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.
TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not
exclusive.
TI assumesno liability for applications assistance, customer product design, software performance, or
infringement of patents 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 to handling the product. This notice contains important safety information about temperatures
and voltages. For further safety concerns, 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, 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 2003, 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 0 V and +5 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.
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
70°C. The EVM is designed to operate properly with certain components above 70°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.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2003, Texas Instruments Incorporated

Related Documentation From Texas Instruments
iii
Preface
Read This First
About This Manual
This user’s guide describes the EVM used to evaluate ten different serial
analog-to-digital converters. These converters are the TLC4541/5,
TLC3541/5, TLC2551/2/5, and TLV2541/2/5; 16-bit, 14-bit, 12-bit, and 12-bit
devices respectfully. A complete circuit description as well as a schematic and
bill of materials are included.
How to Use This Manual
This document contains the following chapters:
Chapter 1 - EVM Overview
Chaper 2 - Layout
Chapter 3 - EVM Bill of Materials and EVM Schematic
Related Documentation From Texas Instruments
To obtain a copy of any of the following TI documents, call the Texas
Instruments Literature Response Center at [phone] or the Product
Information Center (PIC) at [phone]. When ordering, please identify
this booklet by its title and literature number. Updated documents can also be
obtained through our website at WWW.TI.COM.
Data Sheets Literature Numbers
TLV2541/2/5 SLAS245
TLC2551/2/5 SLAS276
TLC3541/5 SLAS345
TLC4541/5 SLAS293
OPA132 SBOS054
REF102 SBVS003
SN74HC1G125DBV SCLS377

Contents
iv
FCC Warning
This equipment is intended for use in a laboratory test environment only. It gen-
erates, uses, and can radiate radio frequency energy and has not been tested
for compliance with the limits of computing devices pursuant to subpart J of
part 15 of FCC rules, which are designed to provide reasonable protection
against radio frequency interference. Operation of this equipment in other en-
vironments 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.

Contents
v
Contents
1 EVM Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Introduction 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Default Jumper Settings 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Analog Interface 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 Digital Interface 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 Power Supplies 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7 Voltage References 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8 EVM Operation 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Layout 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 EVM Bill of Materials and EVM Schematic 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 EVM Bill of Materials 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 EVM Schematic 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figures
2-1 Top Assembly Layer 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2 Ground Plane Layer 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3 Voltage Plane Layer 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-4 Bottom Assembly (Viewed From Top) 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
1-1 Single Input Channel 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 Pseudo DIfferential Input Channels 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3 Dual Input Channels 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4 TLC4541EVM, TLC3541EVM, TLC2551EVM, and TLV2541EVM 1-3. . . . . . . . . . . . . . . . . . . .
1-5 TLC4545EVM, TLC3545EVM, TLC2552/5EVMs, and TLV2542/5EVMs 1-3. . . . . . . . . . . . . .
1-6 Analog Input Connector J1 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-7 Digital Connector J2 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1 EVM Bill of Materials 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
vi

1-1
EVM Overview
EVM Overview
This chapter provides an overview of the TLC4541/5EVM, TLC3541/5EVM,
TLC2551/2/5EVM and TLV2541/2/5EVM.
Topic Page
1.1 Introduction 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Default Jumper Settings 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Analog Interface 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 Digital Interface 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 Power Supplies 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7 Voltage References 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8 EVM Operation 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

Introduction
1-2
1.1 Introduction
The series of TLC4541/5, TLC3541/5, TLC2551/2/5 and TLV2541/2/5 are
high-performance low-power, miniature, CMOS, serial analog to digital
converters (ADCs). The low power performance of these ADCs is further
enhanced by an auto-power-down mode incorporated in each series. Three
series of the devices run at a maximum sample rate of 200 Ksps and have their
own internal conversion clock. The TLC2551/2/5 series runs at 360 Ksps and
uses the external SCLK for conversion.
The EVM is designed to accommodate all of the above devices. The analog
input signal is buffered through an operational amplifier follower. The data
output (DO) signal, from the device under test (DUT), is conditioned through
a digital buffer. An on-board voltage reference is generated and buffered to
drive the DUT. An off-board reference, which is user optional, can be supplied
by reconfiguring jumper (W3). The analog electronics operates with bipolar or
unipolar power supplies, by changing two jumpers.
1.2 Features
The EVM is a full featured board designed to accommodate ten serial ADCs.
Device types and resolutions are listed in the following tables:
Table 1-1.Single Input Channel
Device Resolution
TLC4541 16 Bits
TLC3541 14 Bits
TLC2551 12 Bits
TLV2541 12 Bits
Table 1-2.Pseudo DIfferential Input Channels
Device Resolution
TLC4545 16 Bits
TLC3545 14 Bits
TLC2555 12 Bits
TLV2545 12 Bits
Table 1-3.Dual Input Channels
Device Resolution
TLC2552 12 Bits
TLV2542 12 Bits

Default Jumper Settings
1-3
EVM Overview
1.3 Default Jumper Settings
Table 1-4.TLC4541EVM, TLC3541EVM, TLC2551EVM, and TLV2541EVM
Designator 1-2 2-3
W1 Enables reference offset for single-supply amplifier U1 Not installed N/A
W2 Connects or bypasses buffer U1 to DUT Not installed Installed
W3 Connects onboard or offboard REF Installed Not installed
W4 Connects FS to pin 7 on single input DUTs Not installed Installed
W5 Connects - SCLK to pin 5 for single input ADCs Installed Not installed
W6 Connects either +Va or +5 V to positive power pin of op-amps
U1 and U3 Installed Not installed
W7 Connects either –Va or GND to negative power pin of
op-amps U1 and U3 Installed Not installed
Table 1-5.TLC4545EVM, TLC3545EVM, TLC2552/5EVMs, and TLV2542/5EVMs
Designator 1-2 2-3
W1 Enables reference offset for single-supply amplifier U1 Not installed N/A
W2 Connects or bypasses buffer U1 to DUT Not installed Installed
W3 Connects onboard or offboard REF Installed Not installed
W4 Connects SCLK to pin 7 on dual input DUTs Installed Not installed
W5 Connects -AIN0 to pin 5 on dual input DUT Not installed Installed
W6 Connects either +Va or +5 V to positive power pin of op-amps
U1 and U3 Installed Not installed
W7 Connects either -Va or GND to negative power pin of
op-amps U1 and U3 Installed Not installed

Analog Interface
1-4
1.4 Analog Interface
The EVM board is designed for easy interfacing to analog sources such as
signal generators and sensors. The buffer amplifier U1 is in a follower
configuration, non-inverting gain of one. Output of this buffer drives the AIN(+)
pin of the DUT through a 33-Wresistor (R4). If desired, the user can bypass
U1 by connecting pins 1-2 of jumper W2. For low level common mode
rejection (< 0.2V P-P) dual input pseudo-differential devices TLC4545,
TLC3545, TLC2555 or TLV2545 can be used, byassing U1.
Table 1-6.Analog Input Connector J1
Pin Signal Description
J1.1 AIN0 Analog input signal to the non-inverting input of U1
J1.3 -AIN0 Second input to dual and pseudo differential devices
J1.5 N/C
J1.7 N/C
J1.9 N/C
J1.11 N/C
J1.13 N/C
J1.15 N/C
J1.17 REF+ External refence voltage for the DUT
J1.19 N/C
1.5 Digital Interface
The EVM is designed for easy interfacing to multiple 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 and socket combination at P2. This
header/socket provides access to the digital control and serial data pins for all
10 of the 12-, 14-, and 16-bit ADCs. Consult Samtec at www.samtec.com or
1-800-SAMTEC-9 for a variety of mating connector options.
Table 1-7.Digital Connector J2
Pin Number Signal Description
J2.1 CS Chip select – Active low signal, enables data transfer and device configuration
J2.3 CLKXa Serial clock—damped with 33-Wresistor
J2.5 CLKRa Serial Clock
J2.7 FSXa Frame sync—damped with 33-Wresistor
J2.9 FSRa Frame sync (see Note)
J2.11 Reserved
J2.13 DXRa Serial data out
J2.15 Reserved
J2.17 Reserved
J2.19 Reserved
Note: When using a single input ADC, TLC4541, TLC3541, TLC2551 or TLV2541, Frame Sync must be held at VDD.

Power Supplies
1-5
EVM Overview
1.6 Power Supplies
The EVM requires three power supplies.
1) A dual-tracking ±12-V supply for the dual-supply op amps U1 and U3. The
voltage reference (REF02) is supplied by the +12-V supply. Jumpers W6
and W7 are default settings for this voltage condition.
2) A single +5-V supply is used for the ADC (DUT) and the digital interface.
Op amps U1 and U3 can be used in a unipolar power supply mode (+5 V
and ground) by shorting pins 2-3 of jumper W6 and W7.
1.7 Voltage References
The EVM can be configured to use its onboard reference (REF02) by
connecting pins1-2 of jumper W3. For an external reference source, configure
W3 by connecting pins 2-3 and a DC supply reference voltage to pin 18 of J1.
1.8 EVM Operation
DC voltages can be applied to the EVM board either through the 10-pin
standard power connector (J3) or the test points labeled –12 V, +12 V, +5, and
GND. Apply the appropriate current limited (500 mA max) DC sources to the
board prior to connecting the analog input and digital control signals. The
digital control signals are applied directly to P2, or the EVM can be connected
to a DSP interface board. The interface board is equipped with a power
connector to mate with the 10-pin power connector (J3) on the EVM to supply
the required voltages.
There are a number of interface options available for this style of EVM. Consult
the product folder for a complete list of DSP interface cards and optional
analog interface modules. If the interface options listed are not suitable,
contact the PIC at [phone], for the latest information.

1-6

2-1
Layout
Layout
This chapter provides the board layouts.
Figure 2-1.Top Assembly Layer
Chapter 2

2-2
Figure 2-2.Ground Plane Layer
Analog Ground Section Digital Ground Section
Figure 2-3.Voltage Plane Layer
Amplifier + Supply
Amplifier - Supply

2-3
Layout
Figure 2-4.Bottom Assembly (Viewed From Top)

2-4

3-1
EVM Bill of Materials and EVM Schematic
EVM Bill of Materials and EVM Schematic
This chapter provides a bill of materials and schematic for the
TLC4541/5EVM, TLC3541/5EVM, TLC2551/2/5EVM and TLV2541/2/5EVM.
Topic Page
3.1 EVM Bill of Materials 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 EVM Schematic 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3

EVM Bill of Materials
3-2
3.1 EVM Bill of Materials
The following table contains a complete bill of materials for the
TLC4541/5EVM, TLC3541/5EVM, TLC2551/2/5EVM and TLV2541/2/5EVM.
Contact the Product Information Center (PIC) or e-mail
[email protected] if you have questions regarding this EVM.
Table 3-1.EVM Bill of Materials
Ref Des Description Vendor Part Number
C1 C2 NI
C19 10 pF Panasonic or equivalent ECJ-1VC1H100D
C3 C4 C5 C6
C7 C16 C17 C18 0.1 µFPanasonic or equivalent ECJ-2YB1H104K
C8 C9 C10 C11
C12 C13 C14 C15 10uF Panasonic or equivalent ECS-T1CX106R
FB1 FB2 FB3 SM_FB_2773044447 Fair-Rite 2744044447
J1 J2 Header 10 ×2 Samtec TSM-110-01-T-DV-P
J3 Header 5 ×2 Samtec SSW-105-22-F-D-VS-K
P1 P2 Socket 10 ×2 Samtec SSW-110-22-F-D-VS-K
PCB Gerbers Texas Instruments 6448430
R1 R3 R10 NI Panasonic or equivalent
R2 R11 R12 0R Panasonic or equivalent ERJ-3GEY0R00V
R4 R5 R6 33R Panasonic or equivalent ERJ-3GEYJ330V
R7 R8 100R Panasonic or equivalent ERJ-3GEYJ101V
R9 NI Bourns 3214W-103E
SH1 - SH7 Shunts Samtec or equivalent SNT-100-BK-T-H
U1 U3 Precision op amp Texas Instruments OPA132AU
U2 TLC4541 TLC4541IDGK
U4 REF02 Texas Instruments REF02AU
U5 SN74AHC1G125DBV Texas Instruments SN74AHC1G125DBV
W1 2POS_JUMPER Samtec TSW-102-07-L-S
W2 W3 W4 3POS_JUMPER Samtec TSW-103-07-L-S
W5 W6 W7
GND Black test point loop Keystone 5001
12V 5V 12V Red test point loop Keystone 5000