MCP3907 Energy Meter Reference Design (c) 2010 Microchip Technology Inc. DS51917A Note the following details of the code protection feature on Microchip devices: * Microchip products meet the specification contained in their particular Microchip Data Sheet. * Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. * There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. * Microchip is willing to work with the customer who is concerned about the integrity of their code. * Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as "unbreakable." Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip's code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights. Trademarks The Microchip name and logo, the Microchip logo, dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART, PIC32 logo, rfPIC and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor, MXDEV, MXLAB, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, mTouch, Octopus, Omniscient Code Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit, PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, UniWinDriver, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. (c) 2010, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. ISBN: ISBN: 978-1-60932-450-6 Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company's quality system processes and procedures are for its PIC(R)(R) MCUs and dsPIC(R)(R) DSCs, KEELOQ(R)(R) 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. DS51917A-page 2 (c) 2010 Microchip Technology Inc. MCP3907 ENERGY METER REFERENCE DESIGN Table of Contents Preface ........................................................................................................................... 5 Introduction............................................................................................................ 5 Document Layout .................................................................................................. 5 Conventions Used in this Guide ............................................................................ 6 Recommended Reading........................................................................................ 7 The Microchip Web Site ........................................................................................ 7 Customer Support ................................................................................................. 7 Document Revision History ................................................................................... 7 Chapter 1. Product Overview 1.1 Introduction ..................................................................................................... 9 1.2 What is the MCP3907 Energy Meter Reference Design? .............................. 9 1.3 What the MCP3907 Energy Meter Reference Design Kit Includes ................ 9 Chapter 2. Installation and Operation 2.1 Introduction ................................................................................................... 11 2.2 Features ....................................................................................................... 12 2.3 Getting Started ............................................................................................. 12 2.4 MCP3907 Energy Meter Reference Design Overview ................................. 13 2.5 Front side of the PCB - Detailed Description ............................................... 15 2.6 Back Side of the PCB - Detailed Description ............................................... 16 Appendix A. Schematic and Layouts A.1 Introduction .................................................................................................. 17 A.2 Schematics and PCB Layout ....................................................................... 17 A.3 Board - Schematic ....................................................................................... 18 A.4 Board - Top Silk and Pads .......................................................................... 19 A.5 Board - Top Layer ....................................................................................... 19 A.6 Board - Bottom Silk and Pads ..................................................................... 20 A.7 Board - Bottom Layer .................................................................................. 20 Appendix B. Bill of Materials (BOM) Worldwide Sales and Service .................................................................................... 24 (c) 2010 Microchip Technology Inc. DS51917A-page 3 MCP3907 Energy Meter Reference Design NOTES: DS51917A-page 4 (c) 2010 Microchip Technology Inc. MCP3907 ENERGY METER 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(R) 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 MCP3907 Energy Meter 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 MCP3907 Energy Meter 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" - Important information about the MCP3907 Energy Meter Reference Design. * Chapter 2. "Installation and Operation" - Includes instructions on how to get started with this board, with a detailed description of each block. * Appendix A. "Schematic and Layouts" - Shows the schematic and layout diagrams for the MCP3907 Energy Meter Reference Design. * Appendix B. "Bill of Materials (BOM)" - Lists the parts used to build the MCP3907 Energy Meter Reference Design. (c) 2010 Microchip Technology Inc. DS51917A-page 5 MCP3907 Energy Meter Reference Design CONVENTIONS USED IN THIS GUIDE This manual uses the following documentation conventions: DOCUMENTATION CONVENTIONS Description Arial font: Italic characters 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 Referenced books Emphasized text A window A dialog A menu selection A field name in a window or dialog A menu path MPLAB(R) 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 Represents code supplied by user DS51917A-page 6 Examples File>Save Press <Enter>, <F1> #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} var_name [, var_name...] void main (void) { ... } (c) 2010 Microchip Technology Inc. Preface RECOMMENDED READING This user's guide describes how to use MCP3907 Energy Meter Reference Design. Other useful documents are listed below. The following Microchip documents are available and recommended as supplemental reference resources. MCP3905A/05L/06A Data Sheet - "Energy Metering ICs with Active Real Power Pulse Output" (DS22011) MCP3907 Data Sheet - "Precision Energy Metering IC with Active Power Output, SPI Interface and Internal Oscillator" (DS22256) MCP3909 Data Sheet - "Energy Metering IC with SPI Interface and Active Power Pulse Output"(DS22025) This data sheet provides detailed information regarding the MCP3907 device. AN994 - "IEC Compliant Active Energy Meter Design using the MCP3905A/06A" (DS00994) This application note documents the design decisions associated with MCP3907 Energy Meter Reference Design. The design decisions for the MCP3905A/06A and MCP3909 are applicable to the MCP3907 device. 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 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 A (August 2010) * Initial Release of this Document. (c) 2010 Microchip Technology Inc. DS51917A-page 7 MCP3907 Energy Meter Reference Design NOTES: DS51917A-page 8 (c) 2010 Microchip Technology Inc. MCP3907 ENERGY METER REFERENCE DESIGN Chapter 1. Product Overview 1.1 INTRODUCTION This chapter provides an overview of the MCP3907 Energy Meter Reference Design and covers the following topics: * What is the MCP3907 Energy Meter Reference Design? * What the MCP3907 Energy Meter Reference Design Kit Includes 1.2 WHAT IS THE MCP3907 ENERGY METER REFERENCE DESIGN? The MCP3907 Energy Meter Reference Design is a device energy metering IC that supplies real power information via a pulse output. The MCP3907 Energy Meter Reference Design device includes an internal oscillator for low cost meter designs. An external 3.58 MHz crystal is not required. The MCP3907 Energy Meter Reference Design is used as a reference design for single phase residential meters. The MCP3907 Energy Meter Reference Design includes all the necessary PCB circuits and PCB layout tips required for IEC energy meter compliance. 1.3 WHAT THE MCP3907 ENERGY METER REFERENCE DESIGN KIT INCLUDES This MCP3907 Energy Meter Reference Design kit includes: * MCP3907 Energy Meter Reference Design, 102-00129 * Important Information Sheet (c) 2010 Microchip Technology Inc. DS51917A-page 9 MCP3907 Energy Meter Reference Design NOTES: DS51917A-page 10 (c) 2010 Microchip Technology Inc. MCP3907 ENERGY METER REFERENCE DESIGN Chapter 2. Installation and Operation 2.1 INTRODUCTION The MCP3907 Energy Meter Reference Design is a complete stand-alone single-phase residential meter design for energy meter manufacturers. This energy meter design does not require a crystal for a lower cost meter design. This design also serves as the design of the analog front end (AFE) for advanced meter products. The design includes a low cost DC power supply circuit and the necessary protection for IEC62053-21 EMC testing and IEC62053-21 accuracy. . 8 9 0 1 8 9 0 1 8 9 0 1 4 5 6 7 8 9 0 1 2 3 4 5 2 3 4 5 1000 imp/KWh Class 1 Meter 5(40)a Class 1 Meter 5(40)a POWER = 1432 kW ENERGY = 43213 kWh 01/05/2010 15:23:23 MCP3907 Reference Design PIC(R) MCU MCP3907 MCP3907 current sensing element MCP3907 Stand-Alone Mechanical Counter Energy Meter DIGITAL ANALOG current sensing element Microcontroller-based LCD Energy Meter FIGURE 2-1: MCP3907 Stand-Alone Energy Meter and Microcontroller-Based Energy-Using MCP3907 AFE Design. For more detailed information regarding design decisions and approach to IEC compliance using the circuitry in this board, please refer to AN994 application note (DS00994). (c) 2010 Microchip Technology Inc. DS51917A-page 11 MCP3907 Energy Meter Reference Design 2.2 FEATURES The MCP3907 Energy Meter Reference Design has the following features: * * * * * * * Protection for IEC62053-21 Energy Meter EMC Immunity Tests On-board DC power supply Resistor divider circuit for single-point meter calibration Connections for current sensing shunt or other current sensing element Connection for voltage sensing and power supply biasing Connections for mechanical counter and calibration output Low noise PCB layout for small signal conversion, and IEC accuracy compliance for small shunt values * Low cost design 2.3 GETTING STARTED The MCP3907 Energy Meter Reference Design is a complete stand-alone energy meter compliant to IEC62053-21, IEC1036 and other legacy IEC energy meter specifications. This meter can be manufactured by performing the two steps detailed in this document. For the external connections, the following terms are used: * "Phase" - refers to the hot or line side of the power supply lines * "Neutral" - refers to the return wire or low side of the power supply lines 2.3.1 Step 1: External Connections Connections are made to the phase and neutral wire for voltage detection and AC/DC power supply. The MCP3907 Energy Meter Reference Design is designed to be biased to the phase or hot side of a 2-wire power supply system. Step 1a - Connect JP4 to the phase power supply line connection Step 1b - Connect JP3 to the neutral line Step 1c - Connect JP1 and JP2 across the shunt Step 1d - Connect JP5 and JP6 to the mechanical counter DS51917A-page 12 (c) 2010 Microchip Technology Inc. Installation and Operation 2.3.2 Step 2: Calibration of the Frequency Output Using the Voltage Divider Calibration Circuit Each meter must be calibrated using the voltage divider circuit going into channel 1 of the MCP3907 device. A known power is supplied to the meter (e.g 1000W), aiming the output frequency of 1000 imp/kWh as a goal. The resistor divider is then successively lowered until the output frequency is matched. For more detailed information regarding meter calibration and the PCB design approach used with the circuitry described in this document, please refer to AN994 application note. FIGURE 2-2: Picture of Complete Stand-Alone MCP3907 Energy Meter Reference Design. 2.4 MCP3907 ENERGY METER REFERENCE DESIGN OVERVIEW This reference design can be used as either a complete stand-alone mechanical counter energy meter, or as the analog front-end design in advanced microcontroller based meter designs. The analog front-end (AFE) design limits the overall meter accuracy. A low-noise, proven AFE circuit and layout is still required for a high accuracy meter. For both meter types the current sense input, voltage sense input, calibration scheme, jumper selection and power supply, the design blocks described here should apply. This design keeps all of the major components on the back side of the PCB. This minimizes any environmental side effect when a meter case experiences failure. Only the necessary components for calibration, jumper selection and external connections are placed on the front side of the board. Keeping the larger DC power supply components on the back side of the board is also necessary, for installation in some meter cases with PCB stand-offs. (c) 2010 Microchip Technology Inc. DS51917A-page 13 MCP3907 Energy Meter Reference Design The major components on the front side of the MCP3907 Energy Meter Reference Design are listed below this paragraph. See descriptions in Section 2.5 "Front side of the PCB - Detailed Description": * * * * * Shunts for Gain and FC selection (J11-J15) Calibration Jumpers (J1-J10) Output Connections for Mechanical Counter and Calibration (JP5-JP7) Connection to Current Sensing Element (JP1, JP2) Connection to Voltage or Phase Line and Ground Reference Point (JP3, JP4) The major components on the back side of the MCP3907 Energy Meter Reference Design are listed below. See descriptions in Section 2.6 "Back Side of the PCB - Detailed Description". * * * * * MCP3907 Device (U1) DC Power Supply (C17, C16, U2, C18, D2) Metal Oxide Varistor (MOV1) Optical Isolator(U3) The Analog Ground Plane, Power Supply Ground Plane, Moat The following two sections give an overview of the blocks and their functionality. For more detailed information regarding design decisions and approach to IEC1036 compliance please refer to AN994 application note - "IEC Compliant Active Energy Meter Design using the MCP3905A/06A". For a more detailed circuit schematic, refer to Appendix A. "Schematic and Layouts" and Appendix B. "Bill of Materials (BOM)". Output Conn. (JP5-JP7) Shunts for Gain, FC and HPF selection (J11-J15) Analog Ground Plane Current Conn. (JP1,JP2) Power Supply Ground Plane Calibration Jumpers (J1-J10) FRONT Opto. Isolator (U3) DC Power Supply Analog Ground Plane MOV1 Power Supply Ground Plane MCP3907 (U1) BACK FIGURE 2-3: DS51917A-page 14 MCP3907 Energy Meter Reference Design Block Diagram. (c) 2010 Microchip Technology Inc. Installation and Operation 2.5 FRONT SIDE OF THE PCB - DETAILED DESCRIPTION 2.5.1 Shunts for Gain and FC selection (J11-J15) Positions for both logic "high" and logic "low" are here for all gains and frequency constant selections. The logic "high" positions are labeled J1H, and the "low" positions are labeled J1L, as an example for Jumper 1. Do not short both the "high" and the "low" positions for any of the jumpers. 2.5.2 Calibration Jumpers (J1-J10) Calibration resistors for each of these jumper locations are located directly beneath the associated jumper. When a shorting resistor or a jumper is in place, the associated calibration resistor is shortened and bypassed. 2.5.3 Output Connections for Mechanical Counter and Calibration (JP5-JP7) JP5 and JP6 are the differential output drive for the mechanical counter. JP7 is the calibration or microcontroller output that is connected to HFOUT on the MCP3907 devices. An LED is supplied to assist in any optical calibration schemes. 2.5.4 Connection to Current Sensing Element (JP1, JP2) These two connections lead directly through LRC filtering into Channel 0 of the MCP3907 device. The schematic in Appendix A. "Schematic and Layouts" uses a low cost shunt as current sensing element. The shunt resistance should be placed in parallel with these two connections, between JP1 and JP2. 2.5.5 Connection to Voltage or Phase Line and Ground Reference Point (JP3, JP4) These two connections feed the DC power supply circuitry described in Section 2.6.2 "DC Power Supply (C17, C16, U2, C18, D2)". JP4 is connected to the ground of the PCB, and JP3 to the high side of the DC power supply circuitry. JP3 is also connected to the resistor divider that feeds the analog input of Channel 1 of the MCP3907 device. This is the measuring voltage channel, connected to the differential input in a single-ended fashion. See Section A.3 "Board - Schematic" for further details. (c) 2010 Microchip Technology Inc. DS51917A-page 15 MCP3907 Energy Meter Reference Design 2.6 BACK SIDE OF THE PCB - DETAILED DESCRIPTION 2.6.1 MCP3907 Device (U1) The MCP3907 device is located on the right hand side of the back side of the board, where the analog ground plane exists. The MCP3907 device has appropriate bypass capacitors on VDD coming from the DC power supply circuitry. The MCP3907 device has all its input logic pins connected to user selectable jumpers, with one exception, the HPF pin. For this system the HPF is turned on with this pin connected to VDD; the device is in AC mode only. The REVP connection is not connected in this reference design, and this pin should be left floating. The other three output pins (FOUT0, FOUT1, HFOUT) are connected to nodes JP5, JP6 and JP7, described in this document. 2.6.2 DC Power Supply (C17, C16, U2, C18, D2) The DC power supply is created from a half-wave Zener diode-limited AC signal, feeding a 7805 +5V regulator. C17 and C16 divide the AC signal coming directly from the line (designed in this document for 220V), and Zener diode D2 limits the peak voltage to 15V. For more information regarding this power supply design see application note AN994 - "IEC Compliant Active Energy Meter Design using the MCP3905A/06A" (DS00994). 2.6.3 Metal Oxide Varistor (MOV1) A Metal Oxide Varistor (MOV) is included in this design to suppress any high voltage transients coming through the power lines. 2.6.4 Optical Isolator(U3) An optical isolator is included in the MCP3907 Energy Meter Reference Design as an additional level of protection for other circuitry used in advanced meter designs (PIC(R) microcontroller, DSP or otherwise). It is connected to the HFOUT frequency output of the MCP3907 device. Depending on the meter design, this optical isolator may not be required. This design is a direct-connect meter that has the entire PCB referenced to the line side of the power supply, therefore any other circuitry would either need to be biased to the same point or isolated using this scheme. A pull-up resistor is required on the output of the optical isolator to allow the HF logic signal to appear. 2.6.5 The Analog Ground Plane, Power Supply Ground Plane, Moat The MCP3907 energy meter reference design PCB is designed for low-noise performance and immunity to external influences, as required by IEC62053-21 and legacy IEC energy meter specifications, such as IEC61036. The DC power supply and digital outputs are connected to the power supply ground plane (front side, on the right of the board). The lower noise analog ground plane, including the MCP3907 connections, is on the opposite side of the board, separated by a moat between the two ground planes. An inductive choke connects the two grounds. For further information regarding low-noise PCB design for IEC compliance, see AN994 - "IEC Compliant Active Energy Meter Design using the MCP3905A/06A". DS51917A-page 16 (c) 2010 Microchip Technology Inc. MCP3907 ENERGY METER REFERENCE DESIGN Appendix A. Schematic and Layouts A.1 INTRODUCTION This appendix contains the following schematics and layouts for the MCP3907 Energy Meter Reference Design: * * * * * A.2 Board - Schematic Board - Top Silk and Pads Board - Top Layer Board - Bottom Silk and Pads Board - Bottom Layer SCHEMATICS AND PCB LAYOUT The layer order is shown in Figure A-1. Top Layer Bottom Layer FIGURE A-1: (c) 2010 Microchip Technology Inc. Layer Order. DS51917A-page 17 MCP3907 Energy Meter Reference Design BOARD - SCHEMATIC M A.3 DS51917A-page 18 (c) 2010 Microchip Technology Inc. Schematic and Layouts A.4 BOARD - TOP SILK AND PADS A.5 BOARD - TOP LAYER (c) 2010 Microchip Technology Inc. DS51917A-page 19 MCP3907 Energy Meter Reference Design A.6 BOARD - BOTTOM SILK AND PADS A.7 BOARD - BOTTOM LAYER DS51917A-page 20 (c) 2010 Microchip Technology Inc. MCP3907 ENERGY METER REFERENCE DESIGN Appendix B. Bill of Materials (BOM) TABLE B-1: Qty 4 BILL OF MATERIALS (BOM) Reference C1, C2, C3, C4 Description CAP 33000PF 50V CERM X7R 0805 Manufacturer (R) Panasonic - ECG (R) Part Number ECJ-2VB1H333K 2 C5, C13 CAPACITOR TANT 10UF 6.3V 20% SMD Kemet Electronics Corp. T491A106M006AS 6 C6, C7, C10, C12, C14, C15 CAP .1UF 16V CERAMIC X7R 0805 Panasonic - ECG ECJ-2VB1C104K 2 C8, C9 CAP 22PF 50V CERAMIC 0402 SMD Panasonic - ECG ECJ-0EC1H220J 1 C11 CAP 220UF 10V ELECT FC RADIAL Panasonic - ECG EEU-FC1A221S 1 C16 01UF INTERFERFENCE METAL CAP Panasonic - ECG ECQ-U2A103MN 1 C17 47UF/630VDC METAL POLY CAP Panasonic - ECG ECQ-E6474KF 1 C18 CAP 470UF 35V ELECT FC RADIAL Panasonic - ECG EEU-FC1V471 1 D1 LED GREEN DIFFUSED ROUND LONG Panasonic - SSG LN31GPH 1 D2 RECTIFIER GPP 400V 1A DO-41 Diodes Inc 1N4004-T 1 D3 DIODE ZENER 15V 1W 5% DO-41 Diodes Inc 1N4744A-T 10 J1-J10 RES .1 OHM 1/4W 5% 1210 SMD Panasonic - ECG ERJ-14RSJR10U 6 J11H, J12H, J13H, J14H, J15H, R24 RES 0.0 OHM 1/8W 5% 0805 SMD Panasonic - ECG ERJ-6GEY0R00V 5 J11L, J12L, J13L, DO NOT POPULATE J14L, J15L -- -- 8 JP1-JP8 PIN RECPT .032/.046 DIA 0328 SER Mill-Max(R) Manufacturing Corp. 0328-0-15-15-34-2710-0 1 MOV1 Suppressors; Clamping Voltage Max.:710V EPCOS SIOV-S20K275 1 PCB RoHS Compliant Bare PCB, MCP3907 Energy Meter Reference Design -- 104-00129 3 R1, R2, R13 RES 1.2K OHM 1/16W 5% 0402 SMD Panasonic - ECG ERJ-2GEJ122X 4 R3, R4, R17, R23 RES 1.00K OHM 1/8W 1% 1206 SMD Panasonic - ECG ERJ-8ENF1001V 1 R5 RES 300K OHM 1/2W 5% 2010 SMD Panasonic - ECG ERJ-12ZYJ304U 1 R6 RES 150K OHM 1/4W 5% 1210 SMD Panasonic - ECG ERJ-14YJ154U 1 R7 RES 75K OHM 1/4W 5% 1206 SMD Panasonic - ECG ERJ-8GEYJ753V 1 R8 RES 39K OHM 1/16W 5% 0402 SMD Panasonic - ECG ERJ-2GEJ393X 1 R9 RES 18K OHM 1/16W 5% 0402 SMD Panasonic - ECG ERJ-2GEJ183X 1 R10 RES 9.1K OHM 1/16W 5% 0402 SMD Panasonic - ECG ERJ-2GEJ912X 1 R11 RES 5.1K OHM 1/16W 5% 0402 SMD Panasonic - ECG ERJ-2GEJ512X 1 R12 RES 2.2K OHM 1/16W 5% 0402 SMD Panasonic - ECG ERJ-2GEJ222X 1 R14 RES 560 OHM 1/16W 5% 0402 SMD Panasonic - ECG ERJ-2GEJ561X 2 R15, R16 RES 330K OHM 1/2W 5% 2010 SMD Panasonic - ECG ERJ-12ZYJ334U 1 R18 RES 820 OHM 1/4W 5% 1206 SMD Panasonic - ECG ERJ-8GEYJ821V 2 R19, R20 RES 20 OHM 1/4W 5% 1206 SMD Panasonic - ECG ERJ-8GEYJ200V 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. (c) 2010 Microchip Technology Inc. DS51917A-page 21 MCP3907 Energy Meter Reference Design TABLE B-1: Qty BILL OF MATERIALS (BOM) (CONTINUED) Reference Description Manufacturer Part Number 1 R21 RES 470 OHM 1W 5% METAL OXIDE Panasonic - ECG ERG-1SJ471 1 R22 RES 10 OHM 1/4W 5% 1206 SMD Panasonic - ECG ERJ-8GEYJ100V 1 R25 RES 4.7K OHM 1/16W 5% 0805 SMD Panasonic - ECG ERJ-2GEJ222X 1 U1 Energy Metering Device Microchip Technology Inc. MCP3907 1 U2 IC VOLT REG 5V 100MA 8-SOIC National Semiconductor(R) LM78L05ACM 1 U3 1 CHANNEL OPTO COUPLER TRANS DIP NEC PS2501-1 1 Y1 CRYSTAL 3.579545MHZ 17PF HC49/US ECS Inc ECS-35-17-4 2 Z1,Z2 BEAD CORE SINGLE 3.5X9MM AXIAL Panasonic - ECG EXC-ELSA39 2 Z3,Z4 FERRITE 300MA 150 OHM 1806 SMD Steward LI1806C151R-10 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. DS51917A-page 22 (c) 2010 Microchip Technology Inc. NOTES: (c) 2010 Microchip Technology Inc. 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