MCP6V01
Thermocouple Auto-Zeroed
Reference Design
© 2008 Microchip Technology Inc.
DS51738B
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•
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•
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Trademarks
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PICSTART, rfPIC, SmartShunt and UNI/O are registered
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dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, In-Circuit Serial
Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB
Certified logo, MPLIB, MPLINK, mTouch, PICkit, PICDEM,
PICDEM.net, PICtail, PIC32 logo, PowerCal, PowerInfo,
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are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS51738B-page ii
© 2008 Microchip Technology Inc.
MCP6V01 THERMOCOUPLE
AUTO-ZEROED REFERENCE DESIGN
Table of Contents
Preface ........................................................................................................................... 1
Introduction............................................................................................................ 1
Document Layout .................................................................................................. 1
Conventions Used in this Guide ............................................................................ 2
Recommended Reading........................................................................................ 3
The Microchip Web Site ........................................................................................ 3
Customer Support ................................................................................................. 4
Document Revision History ................................................................................... 4
Chapter 1. Product Overview
1.1 Introduction ..................................................................................................... 5
1.2 MCP6V01 Thermocouple Auto-Zeroed Reference Design Kit Contents ........ 5
1.3 MCP6V01 Thermocouple Auto-Zeroed Reference Design Description ......... 6
Chapter 2. Installation and Operation
2.1 Introduction ................................................................................................... 11
2.2 Required Tool ............................................................................................... 11
2.3 MCP6V01 Thermocouple Auto-Zeroed Reference Design Setup ................ 11
2.4 MCP6V01 Thermocouple Auto-Zeroed Reference Design Operation ......... 12
Appendix A. Schematic and Layout
A.1 Introduction .................................................................................................. 17
A.2 Board - Schematic ....................................................................................... 18
A.3 Board - Top Silk Layer ................................................................................. 19
A.4 Board - Top Metal Layer .............................................................................. 19
A.5 Board - Metal Layer 2 .................................................................................. 20
A.6 Board - Metal Layer 3 .................................................................................. 20
A.7 Board - Bottom Silk Layer (Bottom View) .................................................... 21
A.8 Board - Bottom Layer ................................................................................... 21
Appendix B. Bill Of Materials (BOM)
Worldwide Sales and Service .................................................................................... 26
© 2008 Microchip Technology Inc.
DS51738B-page iii
MCP6V01 Thermocouple Auto-Zeroed Reference Design
NOTES:
DS51738B-page iv
© 2008 Microchip Technology Inc.
MCP6V01 THERMOCOUPLE
AUTO-ZEROED REFERENCE DESIGN
Preface
NOTICE TO CUSTOMERS
All documentation becomes dated, and this manual is no exception. Microchip tools and
documentation are constantly evolving to meet customer needs, so some actual dialogs
and/or tool descriptions may differ from those in this document. Please refer to our web site
(www.microchip.com) to obtain the latest documentation available.
Documents are identified with a “DS” number. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the
document.
For the most up-to-date information on development tools, see the MPLAB® IDE on-line help.
Select the Help menu, and then Topics to open a list of available on-line help files.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
MCP6V01 Thermocouple Auto-Zeroed Reference Design. Items discussed in this
chapter include:
•
•
•
•
•
•
Document Layout
Conventions Used in this Guide
Recommended Reading
The Microchip Web Site
Customer Support
Document Revision History
DOCUMENT LAYOUT
This document describes how to use the MCP6V01 Thermocouple Auto-Zeroed
Reference Design as a development tool to emulate and debug firmware on a target
board. The manual layout is as follows:
• Chapter 1. “Product Overview” - Provides the important information about the
MCP6V01 Thermocouple Auto-Zeroed Reference Design.
• Chapter 2. “Installation and Operation” – Covers the installation and operation
of the MCP6V01 Thermocouple Auto-Zeroed Reference Design. It shows how to
set up the board, and demonstrates how to verify the operation.
• Appendix A. “Schematic and Layout” – Shows the schematic and board
layouts for the MCP6V01 Thermocouple Auto-Zeroed Reference Design.
• Appendix B. “Bill Of Materials (BOM)” – Lists the parts used to build the
MCP6V01 Thermocouple Auto-Zeroed Reference Design.
© 2008 Microchip Technology Inc.
DS51738B- page 1
MCP6V01 Thermocouple Auto-Zeroed Reference Design
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description
Arial font:
Italic characters
Represents
Referenced books
Emphasized text
A window
A dialog
A menu selection
A field name in a window or
dialog
A menu path
MPLAB® IDE User’s Guide
...is the only compiler...
the Output window
the Settings dialog
select Enable Programmer
“Save project before build”
A dialog button
A tab
A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
A key on the keyboard
Click OK
Click the Power tab
4‘b0010, 2‘hF1
Italic Courier New
Sample source code
Filenames
File paths
Keywords
Command-line options
Bit values
Constants
A variable argument
Square brackets [ ]
Optional arguments
Curly brackets and pipe
character: { | }
Ellipses...
Choice of mutually exclusive
arguments; an OR selection
Replaces repeated text
#define START
autoexec.bat
c:\mcc18\h
_asm, _endasm, static
-Opa+, -Opa0, 1
0xFF, ‘A’
file.o, where file can be
any valid filename
mcc18 [options] file
[options]
errorlevel {0|1}
Initial caps
Quotes
Underlined, italic text with
right angle bracket
Bold characters
N‘Rnnnn
Text in angle brackets < >
Courier New font:
Plain Courier New
Represents code supplied by
user
DS51738B- page 2
Examples
File>Save
Press <Enter>, <F1>
var_name [,
var_name...]
void main (void)
{ ...
}
© 2008 Microchip Technology Inc.
Preface
RECOMMENDED READING
This user's guide describes how to use MCP6V01 Thermocouple Auto-Zeroed
Reference Design. Other useful documents are listed below. The following Microchip
documents are available and recommended as supplemental reference resources.
MCP6V01/2/3/6/7/8 Data Sheet, “Auto-Zeroed Op Amps” (DS51738)
This data sheet provides detailed information regarding the MCP6V0X Op Amps.
MCP6001/2/4 Data Sheet, “1 MHz, Low-Power Op Amps” (DS21733)
This data sheet provides detailed information regarding the MCP600X Op Amps.
MCP1525/41 Data Sheet, “2.5V and 4.096V Voltage References” (DS21653)
This data sheet provides detailed information on the MCP15XX Voltage References.
MCP9800/1/2/3 Data Sheet, “2-Wire High-Accuracy Temperature Sensor”
(DS21909)
This data sheet provides detailed information regarding the MCP980X Temperature
Sensors.
PIC18F2455/2550/4455/4550 Data Sheet, “28/40/44-Pin, High-Performance,
Enhanced Flash, USB Microcontrollers with nanoWatt Technology“ (DS39632)
This data sheet provides detailed information regarding the
PIC18F2455/2550/4455/4550 Microcontrollers.
AN679, “Temperature Sensing Technologies” (DS00679)
This application note covers the most popular temperature sensor technologies and
helps determine the most appropriate sensor for an application.
AN684, “Single Supply Temperature Sensing with Thermocouples” (DS00684)
This application note focuses on thermocouple circuit solutions. It builds from signal
conditioning components to complete application circuits.
AN699, “Anti-Aliasing, Analog Filters for Data Acquisition Systems” (DS00699)
A tutorial on active analog filters and their most common applications.
“Signal Chain Design Guide” (DS21825)
THE MICROCHIP WEB SITE
Microchip provides online support via our web site at www.microchip.com. This web
site is used as a means to make files and information easily available to customers.
Accessible by using your favorite Internet browser, the web site contains the following
information:
• Product Support – Data sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives
© 2008 Microchip Technology Inc.
DS51738B- page 3
MCP6V01 Thermocouple Auto-Zeroed Reference Design
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Customers should contact their distributor, representative or field application engineer
(FAE) for support. Local sales offices are also available to help customers. A listing of
sales offices and locations is included in the back of this document.
Technical support is available through the web site at: http://support.microchip.com
DOCUMENT REVISION HISTORY
Revision B (December 2008)
• Updated the Bottom Metal Layer print.
• Updated Product Review.
Revision A (May 2008)
• Initial Release of this Document.
DS51738B- page 4
© 2008 Microchip Technology Inc.
MCP6V01 THERMOCOUPLE
AUTO-ZEROED REFERENCE DESIGN
Chapter 1. Product Overview
1.1
INTRODUCTION
The MCP6V01 Thermocouple Auto-Zeroed Reference Design is described by the
following:
• Assembly # : 114-00169
• Order # : MCP6V01RD-TCPL
• Name: MCP6V01 Thermocouple Auto-Zeroed Reference Design Board
Items discussed in this chapter include:
• MCP6V01 Thermocouple Auto-Zeroed Reference Design Board Kit Contents
• MCP6V01 Thermocouple Auto-Zeroed Reference Design Board Description
• Associated Tools
1.2
MCP6V01 THERMOCOUPLE AUTO-ZEROED REFERENCE DESIGN KIT
CONTENTS
•
•
•
•
MCP6V01 Thermocouple Auto-Zeroed Reference Design (102-00169)
Important “Read First” Information
Accessory Bag - Contains a K-type thermocouple and an USB cable
Analog and Interface Products Demonstration Boards CD-ROM (DS21912)
includes:
- MCP6V01 Thermocouple Auto-Zeroed Reference Design (D51738)
- Thermal Management Software
- Firmware for PIC18F2550
FIGURE 1-1:
© 2008 Microchip Technology Inc.
MCP6V01 Thermocouple Auto-Zeroed Reference Design Kit.
DS51738B- page 5
MCP6V01 Thermocouple Auto-Zeroed Reference Design
1.3
MCP6V01 THERMOCOUPLE AUTO-ZEROED REFERENCE DESIGN
DESCRIPTION
1.3.1
Function Block Diagram Description
The MCP6V01 Thermocouple Auto-Zeroed Reference Design demonstrates how to
measure electromotive force (EMF) voltage at the cold junction of the thermocouple in
order to accurately measure temperature at the hot junction. This can be done by using
the MCP6V01 auto-zeroed op amp because of its ultra low offset voltage (VOS) and
high common mode rejection ratio (CMRR).
• The difference amplifier is implemented using the MCP6V01 and 0.1% tolerance
resistors. It amplifies the EMF voltage at the cold junction of the thermocouple.
• The MCP9800 senses temperature at the type K thermocouple’s connector. It
should be located as close as possible to the connector on the PCB. This
measurement is used to perform cold junction compensation for the thermocouple
measurement.
• The MCP1541 provides a VREF (4.1V) to the internal 10-Bit ADC of the
PIC18F2550 and sets the reference voltage for the difference amplifier.
• The CVREF is the internal comparator voltage reference of PIC18F2550, which is
a 16-tap resistor ladder network that provides a selectable reference voltage. The
MCP6001 buffer amplifier eliminates the voltage reference output impedance
problem and produces the voltage VSHIFT.
• The 2nd order RC low-pass filter that is implemented in this circuit can remove the
high frequency noise and aliasing at the ADC input. The ADC of PIC18F2550
completes the analog-to-digital conversion. The data will be transferred to the PC
using the USB interface.
• The Thermal Management Software on PC is used to perform data display to
show the real-time temperature and apply cold junction compensation and data
linearization to determine the actual temperature of the thermocouple’s hot
junction (weld bead).
DS51738B- page 6
© 2008 Microchip Technology Inc.
Product Overview
Figure 1-2 shows the function block diagram of the MCP6V01 Thermocouple
Auto-Zeroed Reference Design.
PC
(Thermal Management Software)
USB
PIC18F2550 (USB) Microcontroller
I2C Port
CVREF
10-Bit ADC Module
VOUT2
MCP6001
3
Buffer
2nd Order RC
Low-Pass Filter
x1
MCP1541 4.1V
Voltage Reference
VOUT1
SDA
SCKL
ALERT
Cold Junction
Compensation
MCP9800
Temp. Sensor
VSHIFT
Difference
Amplifier
MCP6V01
TCJ
VREF
Type K Thermocouple
+ VIN+
TTC
- VINConnector
(Cold Junction)
Welded Bead
(Hot Junction)
FIGURE 1-2:
Function Block Diagram of the MCP6V01 Thermocouple
Auto-Zeroed Reference Design.
© 2008 Microchip Technology Inc.
DS51738B- page 7
MCP6V01 Thermocouple Auto-Zeroed Reference Design
1.3.2
Analog Sensing Circuit Diagram Description
• Difference Amplifier
- Uses a MCP6V01 auto-zeroed op amp (U5)
- Two 0.1% tolerance gain resistors (R8 and R11)
- Two 0.1% tolerance input resistors for shifting VOUT1 (R9 and R10)
- Two 0.1% tolerance input resistors for the thermocouple output (R6 and R7)
• Buffer Amplifier
- Uses a MCP6001 standard op amp (U4)
- Outputs VSHIFT which shifts VOUT1 by 16 different values
- Sends VSHIFT back to PIC’s internal ADC to make calculated result more
accurate
• 2nd Order RC Low-Pass Filter
- Fast enough to quick changes in temperature
- Double pole for anti-aliasing and removing high-frequency noise
- No DC offset and simple architecture
Figure 1-3 shows the analog sensing circuit diagram of MCP6V01 Thermocouple
Auto-Zeroed Reference Design.
Buffer Amplifier
Difference Amplifier
VSHIFT
R9 5.6k
R8 100k
MCP6001
CVREF
2nd Order RC
Low-Pass Filter
VDD
U4
0.1 µF
R6 100O
VINR7 100O
VIN+
R12
VOUT1 499O
R13
499O
VOUT2
MCP6V01
U5
C6
0.1 µF
C7
0.1 µF
VREF = 4.1V
R9 5.6k
R8 100k
FIGURE 1-3:
Analog Sensing Circuit Diagram of the MCP6V01 Thermocouple
Auto-Zeroed Reference Design.
DS51738B- page 8
© 2008 Microchip Technology Inc.
Product Overview
1.3.3
VSHIFT Operation Description
CVREF produces VSHIFT through the buffer amplifier. VSHIFT is brought back to the
PIC18F2550 so that it can be sampled by the ADC, then used to adjust the measured
VOUT1. This makes the VSHIFT values accurate to the 10-Bit ADC’s capability. The
values within each range also have a resolution of 10 bits. Thus, this gives 14 bits of
resolution in total.
• 14-Bit Resolution, 10-Bit ADC
- PIC18F2550’s CVREF (16 levels) subdivides input ranges
- PIC18F2550’s internal 10-Bit ADC converts result and calibrates CVREF
- The firmware automatically searches for correct CVREF value
• This solution minimizes cost by using resources internal to the PIC to achieve reasonable resolution without an external ADC. Further savings could be achieved by
using a voltage reference internal to the PIC instead of the external MCP1541.
Note:
VOUT1, VSHIFT1 and VIN+ - VIN- are not drawn to scale. This is a conceptual
diagram only.
Figure 1-4 shows the conceptual diagram of the VSHIFT operation.
PIC’s internal 10-Bit ADC
V REF
V SHIFT
×1
CV REF
V IN+
Buffer
MCP6001
Difference
Amplifier
MCP6V01
V OUT1
V IN-
VOUT1 without VSHIFT
VOUT1 with VSHIFT
4.1V
VSHIFT
VIN+ – VIN-
FIGURE 1-4:
© 2008 Microchip Technology Inc.
1100
1000
900
800
700
600
500
400
300
200
100
0
TTC (°C)
VSHIFT Operation Conceptual Diagram.
DS51738B- page 9
MCP6V01 Thermocouple Auto-Zeroed Reference Design
The MCP6V01 Thermocouple Auto-Zeroed Reference Design has the following
features:
•
•
•
•
•
•
•
DS51738B- page 10
Uses a MCP6V01 difference amplifier as an analog sensor conditioning circuit
Uses the K-type thermocouple to sense temperature
Temperature range is from -100°C to +1000°C
Uses the MCP9800 Temperature Sensor for cold junction compensation
Uses the USB interface to transfer data to PC
14-Bit Resolution, 10-Bit ADC
Test points for bench work
© 2008 Microchip Technology Inc.
MCP6V01 THERMOCOUPLE
AUTO-ZEROED REFERENCE DESIGN
Chapter 2. Installation and Operation
2.1
INTRODUCTION
This chapter shows how to set up the MCP6V01 Thermocouple Auto-Zeroed Reference Design and explores the operation of a temperature measurement application.
Items discussed in this chapter include:
• Required Tools
• MCP6V01 Thermocouple Auto-Zeroed Reference Design Setup
• MCP6V01 Thermocouple Auto-Zeroed Reference Design Operation
2.2
REQUIRED TOOL
• The Personal Computer (PC) shown in Figure 1-2 needs to run on Windows® 98
SE or later. It provides a convenient interface for the user, communicates with the
boards, and provides power through the USB connection.
2.3
MCP6V01 THERMOCOUPLE AUTO-ZEROED REFERENCE DESIGN SETUP
1. Connect the type K thermocouple and the USB cable to the MCP6V01 Thermocouple Auto-Zeroed Reference Design.
An exploded view is shown in the Figure 2-1.
FIGURE 2-1:
© 2008 Microchip Technology Inc.
MCP6V01 Thermocouple Auto-Zeroed Reference Design Setup.
DS51738B-page 11
MCP6V01 Thermocouple Auto-Zeroed Reference Design
2.4
MCP6V01 THERMOCOUPLE AUTO-ZEROED REFERENCE DESIGN
OPERATION
1. Start the Thermal Management Software on the PC.
If the hardware is connected properly, the software will recognize the hardware
and this is confirmed by showing the Thermocouple Instrumentation GUI Using
MCP6V01 panel, as indicated in Figure 2-2. Otherwise, the software will show
the Hardware Not Detected message box, as indicated in Figure 2-3.
FIGURE 2-2:
Thermocouple Instrumentation GUI Using MCP6V01.
FIGURE 2-3:
Hardware Not Detected Message Box.
DS51738B-page 12
© 2008 Microchip Technology Inc.
Installation and Operation
2.4.1
Set Up the MCP9800 Temperature Sensor Configuration
1. Click the MCP9800 Setup tab.
2. The MCP9800 Configuration can be modified from the default values.
3. Click the Update Temp. button to complete the modifications.
FIGURE 2-4:
MCP9800 Setup.
© 2008 Microchip Technology Inc.
DS51738B-page 13
MCP6V01 Thermocouple Auto-Zeroed Reference Design
2.4.2
Set Up the Thermocouple Configuration
1. Click the Thermocouple Setup tab.
2. Enable thermocouple is selected as default. Enable Calibration also can be
selected.
3. Click the Update button to complete the setup.
.
FIGURE 2-5:
DS51738B-page 14
Thermocouple setup.
© 2008 Microchip Technology Inc.
Installation and Operation
2.4.3
Customize the Realtime Data Aquisition
1. Double click on the region of the stipchart to customize the Realtime Data Aquisition.
.
FIGURE 2-6:
© 2008 Microchip Technology Inc.
Realtime Data Aquisition Customization.
DS51738B-page 15
MCP6V01 Thermocouple Auto-Zeroed Reference Design
2.4.3.1
START THE REALTIME DATA AQUISITION
1. Click the PLAY button to start the Realtime Data Aquisition.
FIGURE 2-7:
DS51738B-page 16
Start Realtime Data Aquisition.
© 2008 Microchip Technology Inc.
MCP6V01 THERMOCOUPLE
AUTO-ZEROED REFERENCE DESIGN
Appendix A. Schematic and Layout
A.1
INTRODUCTION
This appendix contains the following schematics and layouts for the MCP6V01 Thermocouple Auto-Zeroed Reference Design:
•
•
•
•
•
•
•
Board – Schematic
Board – Top Silk Layer
Board – Top Metal Layer
Board – Metal Layer 2
Board – Metal Layer 3
Board – Bottom Silk Layer
Board – Bottom Metal Layer
© 2008 Microchip Technology Inc.
DS51738B-page 17
MCP6V01 Thermocouple Auto-Zeroed Reference Design
BOARD - SCHEMATIC
M
A.2
DS51738B-page 18
© 2008 Microchip Technology Inc.
Schematic and Layout
A.3
BOARD - TOP SILK LAYER
A.4
BOARD - TOP METAL LAYER
© 2008 Microchip Technology Inc.
DS51738B-page 19
MCP6V01 Thermocouple Auto-Zeroed Reference Design
A.5
BOARD - METAL LAYER 2
A.6
BOARD - METAL LAYER 3
DS51738B-page 20
© 2008 Microchip Technology Inc.
Schematic and Layout
A.7
BOARD - BOTTOM SILK LAYER (BOTTOM VIEW)
A.8
BOARD - BOTTOM METAL LAYER
© 2008 Microchip Technology Inc.
DS51738B-page 21
MCP6V01 Thermocouple Auto-Zeroed Reference Design
NOTES:
DS51738B-page 22
© 2008 Microchip Technology Inc.
MCP6V01 THERMOCOUPLE
AUTO-ZEROED REFERENCE DESIGN
Appendix B. Bill Of Materials (BOM)
TABLE B-1:
Qty
BILL OF MATERIALS (BOM)
Reference
Description
Manufacturer
Part Number
5
C1, C6, C7, C13, CAP .1UF 25V CERAMIC X7R
C14
0805
Panasonic® - ECG
ECJ-2VB1E104K
1
C2
CAP 1.0UF 25V CERAMIC F
0805
Panasonic - ECG
ECJ-2FF1E105Z
2
C3, C4
CAP CER 10UF 16V Y5V 0805
Murata Electronics® North GRM21BF51C106ZE15
America
L
1
C5
CAP 1.0UF 25V CERAMIC F
0603
Panasonic - ECG
ECJ-1VF1E105Z
1
C8
CAP .47UF 25V CERAMIC Y5V Panasonic - ECG
0805
ECJ-2YF1E474Z
2
C9, C10
CAP 22PF 50V CERM CHIP
0805 SMD
Panasonic - ECG
ECJ-2VC1H220J
2
C11, C12
CAP .1UF 25V CERAMIC X7R
0603
Panasonic - ECG
ECJ-1VB1E104K
1
J1
Circuit Board Thermocouple
Connectors, Standard
OMEGA
PCC-SMP-K-100
1
J2
HEADER 1X6
DO NOT POPULATE
—
—
1
J3
CONN RECEPT MINI USB2.0
5POS
Hirose Electronic Co Ltd
UX60-MB-5ST
1
L1
INDUCTOR 10UH 100MA 0805 Murata Electronics North
America
LQM21FN100M70L
1
PCB
RoHS Compliant Bare PCB,
Thermocouple Auto-Zero RD
Board
104-00169
3
R1, R2, R5
RES 10.0K OHM 1/8W 1% 0805 Panasonic - ECG
SMD
ERJ-6ENF1002V
1
R3
RES 1.0 OHM 1/8W 1% 0805
SMD
Panasonic - ECG
ERJ-6RQF1R0V
1
R4
RES 100K OHM 1/8W 1% 0805 Panasonic - ECG
SMD
ERJ-6ENF1003V
2
R6, R7
RES 100 OHM 1/10W 0.1%
0805 SMD
Panasonic - ECG
ERA-6AEB101V
2
R8, R11
RES 100K OHM 1/10W 0.1%
0805 SMD
Panasonic - ECG
ERA-6AEB104V
2
R9, R10
RES 5.6K OHM 1/10W 0.1%
0805 SMD
Panasonic - ECG
ERA-6AEB562V
2
R12, R13
RES 499 OHM 1/8W 1% 0805
SMD
Panasonic - ECG
ERJ-6ENF4990V
Note 1:
—
The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM
used in manufacturing uses all RoHS-compliant components.
© 2008 Microchip Technology Inc.
DS51738B-page 23
MCP6V01 Thermocouple Auto-Zeroed Reference Design
TABLE B-1:
Qty
BILL OF MATERIALS (BOM) (CONTINUED)
Reference
Description
Manufacturer
Part Number
3
R14, R15, R16
RES 1.0K OHM 1/10W 1% 0603 Panasonic - ECG
SMD
ERJ-3EKF1001V
1
Thermocouples
(5 Per Pack)
Ready-Made Insulated Thermo- OMEGA
couples with Kapton, PFA,
Glass Braid Insulation and
Molded Connectors
5SRTC-TT-K-24-36
(5 Pcs. Per Pack)
10
TP1---TP10
TEST POINT PC COMPACT
SMT
Keystone Electronics®
5016
1
U1
28/40/44-Pin, High-Performance, Enhanced Flash, USB
Microcontrollers with nanoWatt
Technology
Microchip Technology Inc.
PIC18F2550-I/SO
Microchip Technology Inc.
MCP1541T-I/TT
1
U2
4.096V Voltage Reference
1
U3
Memory Module Digital Temper- Microchip Technology Inc.
ature Sensor, MCP9800
MCP9800A0T-M/OTG
1
U4
MCP6001, SOT-23-5
Microchip Technology Inc.
MCP6001T-I/OT
1
U5
MCP60V1, SOIC-8
Microchip Technology Inc.
MCP6V01T-E/SN
1
Y1
CRYSTAL 20.0000 MHZ
SERIES SMT
CTS-Frequency Controls
ATS200SM
Note 1:
The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM
used in manufacturing uses all RoHS-compliant components.
DS51738B-page 24
© 2008 Microchip Technology Inc.
Bill Of Materials (BOM)
NOTES:
© 2008 Microchip Technology Inc.
DS51738B-page 25
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01/02/08
DS51738B-page 26
© 2008 Microchip Technology Inc.