TI1 AMC1204EVM Full-featured evaluation module Datasheet

User's Guide
SBAU178 – August 2010
AMC1204EVM
This user's guide describes the characteristics, operation, and use of the AMC1204EVM. The
AMC1204EVM is designed for prototyping and evaluation. A complete circuit description, schematic
diagram, and bill of materials are included.
The following related documents are available through the Texas Instruments web site at www.ti.com.
1
2
3
4
5
6
Device
Literature Number
AMC1204
SBAS512
AMC1210
SBAS372
Contents
AMC1204EVM Overview ...................................................................................................
1.1
Features .............................................................................................................
1.2
Introduction .........................................................................................................
Analog Interface .............................................................................................................
2.1
Analog Inputs .......................................................................................................
Digital Interface ..............................................................................................................
Power-Supplies ..............................................................................................................
EVM Set-up and Operation ................................................................................................
5.1
Isolated Power and Analog Inputs: J1 and J4 ..................................................................
5.2
Device Operation ...................................................................................................
BOM, Schematic, and Layout .............................................................................................
6.1
Schematic ...........................................................................................................
6.2
Printed Circuit Board Layout ......................................................................................
6.3
Bill of Materials .....................................................................................................
2
2
2
2
2
3
4
4
4
5
5
5
5
6
All trademarks are the property of their respective owners.
SBAU178 – August 2010
AMC1204EVM
Copyright © 2010, Texas Instruments Incorporated
1
AMC1204EVM Overview
www.ti.com
1
AMC1204EVM Overview
1.1
Features
AMC1204EVM:
• Full-featured evaluation module for the AMC1204 single-channel, ΔΣ modulator
• 9-pin sub-D connector for interfacing to the AMC1210 digital filter evaluation module
• Screw terminals for easy access to analog inputs
1.2
Introduction
The AMC1204 is a 1-bit modulator with an output buffer separated from the input interface circuitry by a
silicon dioxide (SiO2) isolation barrier. The isolation barrier provides galvanic isolation of up to 4000 VPEAK.
When used in combination with the AMC1210 or other digital filter, the AMC1204 can be used to achieve
16-bit analog-to-digital (A/D) conversion with no missing codes.
For use in high-resolution measurement applications, an effective accuracy of 14 bits can be obtained with
a digital filter bandwidth of 20 kHz at a modulator rate of 10 MHz.
Throughout this document, the abbreviation EVM and the term evaluation module are synonymous with
the AMC1204EVM.
2
Analog Interface
The analog input to the AMC1204 is routed from a two-wire screw terminal screw at J4. This screw
terminal gives the user access to the inverting and noninverting inputs of the AMC1204.
2.1
Analog Inputs
The analog input to the AMC1204EVM board consists of simple R/C filter circuits. The input circuit for the
AMC1204 is shown in Figure 1.
R1
IN+
12
R2
C3
330pF
IN-
12
J4
C4
10pF
C5
10pF
2
1
ISOGND
Figure 1. AMC1204EVM Schematic: Analog Input Section
2
AMC1204EVM
SBAU178 – August 2010
Copyright © 2010, Texas Instruments Incorporated
Digital Interface
www.ti.com
3
Digital Interface
The AMC1204EVM is designed for use with digital filters such as the AMC1210. The output and power for
the AMC1204 are routed to a 9-pin, female D-type connector. Both the analog and digital power for the
AMC1204, as well as the modulator data and clock outputs from the device under test, are routed to J2,
as Figure 2 illustrates.
VDD2
J3
1
VDD2
VDD2
2
3
4
C1
0.1mF
11
16
J2
4
9
5
W1
3
9
1
GND1
2
7
3
8
1
GND2
13
2
DATA
1
6
3
CLKIN
14
2
VDD2
C2
4.7mF
W2
Figure 2. Power and Digital Outputs
Connector J3 and jumpers W1 and W2 can be used to connect up to two AMC1204EVMs together,
providing power, CLKIN, and DATA signals to the AMC1210 filter chip using a single 9-pin, female, D-type
connector.
SBAU178 – August 2010
AMC1204EVM
Copyright © 2010, Texas Instruments Incorporated
3
Power-Supplies
4
www.ti.com
Power-Supplies
J2 provides access to the +5 VA for the VDD2 supply. All power to the board should be sourced from a
well-regulated, linear supply that has current limiting capabilities. Power is to be applied through J2.
Table 1 describes the pinout for J2.
Table 1. J2: Power Supply and Digital Outputs
Signal
Pin Number
Signal
Ground
1
2
Not used
4.5 to 5.5 VDD2 supply
3
4
Not used
Ground
5
6
Optional CLKIN output
CLKIN default
7
8
DATA default
Optional DATA output
9
For standalone operation, power sources can also be applied via a mating connector to J2, and the digital
output data stream can be wired directly to an FPGA or other digital filter module for further processing.
Refer to Figure 2 or the schematic appended to the end of this document for additional details.
5
EVM Set-up and Operation
This section describes the general operation of the AMC1204EVM.
5.1
Isolated Power and Analog Inputs: J1 and J4
The isolated power input to the AMC1204EVM printed circuit board (PCB) can be applied directly to J1,
pins 1 and 2. Table 2 lists the details of J1.
Table 2. J1: Isolated Power
Pin Number
Signal
J1.1
ISOGND
J1.2
5 VISO
Description
Connection to the AMC1204 GND1 pin
Connection to the AMC1204 VDD1 terminal
The analog input to the AMC1204EVM PCB can be applied directly to J4 pins 1 and 2. Table 3 lists the
details of J4.
CAUTION
Carefully review the AMC1204 product data sheet for the limitations of the
analog input range, and ensure that the appropriate analog/digital voltages are
applied before connecting any analog input to the EVM.
Table 3. J4: Analog Inputs
4
Pin Number
Signal
J4.1
CHA+
Noninverting analog input to the AMC1204
Description
J4.2
CHA–
Inverting input to the AMC1204
AMC1204EVM
SBAU178 – August 2010
Copyright © 2010, Texas Instruments Incorporated
BOM, Schematic, and Layout
www.ti.com
5.2
Device Operation
Once the analog and digital power sources are applied to the AMC1204EVM, the digital outputs become
active upon the application of an external modulator clock source. The internal reference of the AMC1204
is used as the conversion reference.
Additionally, an analog input signal may be applied directly at screw terminal J1. See Figure 1 and Table 3
for more details. The analog input range, (VIN+) – (VIN–), is ±320 mV.
As the input voltage approaches the maximum input level of +320mV, the 1s density of the modulator
output approaches 92%. Likewise, when the input voltage approaches the lower limit of –320 mV, the 1s
density is approximately 8%.
6
BOM, Schematic, and Layout
This section contains the complete bill of materials, schematic diagram, and PCB layout for the
AMC1204EVM.
NOTE: Board layouts are not to scale. These are intended to show how the board is laid out; they
are not intended to be used for manufacturing AMC1204EVM PCBs.
6.1
Schematic
The AMC1204EVM schematic is appended to this document.
6.2
Printed Circuit Board Layout
Figure 3. AMC1204EVM Silk Screen Drawing
SBAU178 – August 2010
AMC1204EVM
Copyright © 2010, Texas Instruments Incorporated
5
BOM, Schematic, and Layout
6.3
www.ti.com
Bill of Materials
Table 4. AMC1204EVM Bill of Materials
Reference Designator
Manufacturer
Mfr Part Number
Capacitor, ceramic 0.10 mF 50 V X7R 10% 0603
TDK
C1608X7R1H104K
C2, C7
Capacitor, ceramic 4.7 mF 25 V X5R 0805
TDK
C2012X5R1E475K
Capacitor, ceramic 330 pF 50 V C0G 5% 0603
TDK
C1608C0G1H331J
Capacitor, ceramic 10 pF 50 V C0G 0603
TDK
C1608C0G1H100D
C3
C4, C5
D1
J1, J4
Not installed
—
—
Terminal block 3.5 mm 2-pos PCB
On Shore
ED555/2DS
J2
Connector, DB-9 female solder cup tin
Norcomp
172-009-202R001
J3
4-pin, single row header
Samtec
TSW-104-07-L-S
R1, R2
Resistor, 12.0 Ω 1/10 W 1% 0603 SMD
Yageo
RC0603FR-0712RL
R3
Resistor, 0..0 Ω 1/10 W 5% 0603 SMD
Yageo
RC0603JR-070RL
W1, W2
Not installed, solder short pins 1 and 2
—
—
IC Delta-Sigma Mod 1bit 8-SOP
TI
AMC1204DW
U1
6
Description
C1, C6
AMC1204EVM
SBAU178 – August 2010
Copyright © 2010, Texas Instruments Incorporated
1
2
3
4
REVISION HISTORY
REV
ENGINEERING CHANGE NUMBER
APPROVED
D
D
VDD1
5Viso
J1
VDD2
R3
2
1
OST_ED-1514
J3
0
C7
4.7uF
1
2
3
4
D1
5.1V
GND
VDD2
HEADER-4
GND
C2
4.7uF
5Viso
C
C6
1
6
2
7
3
8
4
9
5
VDD2
U1
C1
0.1uF
1
GND
J4
12
OST_ED-1514
2
C3
330pF
2
1
3
R2
4
12
VDD2
IN+
CLKIN
IN-
DATA
GND1
GND2
GND1
GND1
14
13
0.1uF
J2
RS232
11
16
9
1
2
3
8
VDD1
1
2
3
R1
C
AMC1204DW
W1
2MM-3
GND
C4
10pF
W2
2MM-3
C5
10pF
GND
B
B
ti
Precision Analog
HIGH-PERFORMANCE ANALOG DIVISION
SEMICONDUCTOR GROUP
A
12500 TI Blvd, Dallas, TX 75243
ENGINEER
Tom Hendrick
DRAWN BY
Tom Hendrick
DOCUMENT CONTROL NO.TBD
SHEET 1
1
2
3
OF 1
TITLE
AMC1204EVM
SIZE A
REV A
DATE 05AUG10
FILE C:\Userdata\EVMS\AMC1204\AMC1204.ddb - Documents\SCH\AMC1204
4
A
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
PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and
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 to 5V and the output voltage range of 0V to 5V.
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 +30°C. The EVM is designed to
operate properly with certain components above +30°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 © 2010, Texas Instruments Incorporated
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 orders and should verify that such information is current and complete. All products are
sold subject to TI’s terms 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.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,
or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information
published by TI regarding third-party products or services 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 TI 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. Information of third parties may be subject to additional
restrictions.
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.
TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably
be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing
such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be
provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in
such safety-critical applications.
TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are
specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military
specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at
the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.
TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are
designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated
products in automotive applications, TI will not be responsible for any failure to meet such requirements.
Following are URLs where you can obtain information on other Texas Instruments products and application solutions:
Products
Applications
Amplifiers
amplifier.ti.com
Audio
www.ti.com/audio
Data Converters
dataconverter.ti.com
Automotive
www.ti.com/automotive
DLP® Products
www.dlp.com
Communications and
Telecom
www.ti.com/communications
DSP
dsp.ti.com
Computers and
Peripherals
www.ti.com/computers
Clocks and Timers
www.ti.com/clocks
Consumer Electronics
www.ti.com/consumer-apps
Interface
interface.ti.com
Energy
www.ti.com/energy
Logic
logic.ti.com
Industrial
www.ti.com/industrial
Power Mgmt
power.ti.com
Medical
www.ti.com/medical
Microcontrollers
microcontroller.ti.com
Security
www.ti.com/security
RFID
www.ti-rfid.com
Space, Avionics &
Defense
www.ti.com/space-avionics-defense
RF/IF and ZigBee® Solutions www.ti.com/lprf
Video and Imaging
www.ti.com/video
Wireless
www.ti.com/wireless-apps
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2010, Texas Instruments Incorporated
Similar pages