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Summary of Contents for Microchip Technology MCP3905A
- Page 1 MCP3905A/06A Energy Meter Reference Design © 2009 Microchip Technology Inc. DS51565B...
- Page 2 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.
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Page 3: Table Of Contents
Chapter 1. Product Overview 1.1 Introduction ..................... 5 1.2 What is the MCP3905A/06A Energy Meter Reference Design? ....5 1.3 What the MCP3905A/06A Energy Meter Reference Design Kit Includes ..5 Chapter 2. Installation and Operation 2.1 Introduction ..................... 7 2.2 Features ...................... - Page 4 MCP3905A/06A Energy Meter Reference Design NOTES: © 2009 Microchip Technology Inc. DS51565B-page iv...
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Page 5: Preface
• Customer Support • Document Revision History DOCUMENT LAYOUT This document describes how to use the MCP3905A/06A Energy Meter Reference Design as a development tool to emulate and debug firmware on a target board. The manual layout is as follows: •... - Page 6 MCP3905A/06A Energy Meter Reference Design CONVENTIONS USED IN THIS GUIDE This manual uses the following documentation conventions: DOCUMENTATION CONVENTIONS Description Represents Examples Arial font: ® Italic characters Referenced books MPLAB IDE User’s Guide Emphasized text ...is the only compiler... Initial caps...
- Page 7 Preface RECOMMENDED READING This user's guide describes how to use MCP3905A/06A Energy Meter Reference Design. Other useful documents are listed below. The following Microchip documents are available and recommended as supplemental reference resources. • MCP3905 Data Sheet, “Energy Metering IC with Active Real Power Pulse Output”...
- Page 8 MCP3905A/06A Energy Meter Reference Design DOCUMENT REVISION HISTORY Revision B (August 2009) • Update from MCP3905/06 to MCP3905A/06A devices Revision A (July 2005) • Initial Release of this Document © 2009 Microchip Technology Inc. DS51565B-page 4...
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Page 9: Chapter 1. Product Overview
• What the MCP3905A/06A Energy Meter Reference Design Kit includes WHAT IS THE MCP3905A/06A ENERGY METER REFERENCE DESIGN The MCP3905A/06A Energy Meter Reference Design device is an energy metering IC that supplies average active power information via a pulse output with direct drive for mechanical counters. - Page 10 MCP3905A/06A Energy Meter Reference Design NOTES: © 2009 Microchip Technology Inc. DS51565B-page 6...
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Page 11: Introduction
IEC62053 compliance using the circuitry in this board, refer to AN994 “IEC Compliant Active Energy Meter Design Using The MCP3905A/06A” (DS00994). FEATURES The MCP3905A/06A Energy Meter Reference Design PCB has the following features: • Protection for IEC62053 Energy Meter EMC Immunity Tests • On-Board DC power supply •... -
Page 12: Getting Started
Each meter must be calibrated using the voltage divider circuit going into Channel 1 of the MCP3905A/06A. A known power is supplied to the meter (e.g., 1000W), and an expected output frequency is the goal (1000 imp/kWh). Start with the highest value resistor and short the resistor using it's respective shorting jumper. -
Page 13: Energy Meter Reference Design Overview
DC power supply components on the back-side of the board is also necessary for installation in some meter cases with PCB standoffs. The major components on the front-side of the MCP3905A/06A Energy Meter Refer- ence Design are listed here and described in Section 2.5 “Front-Side Of PCB Detailed Description”. -
Page 14: Front-Side Of Pcb Detailed Description
JP5 and JP6 are the differential output drive for the mechanical counter. JP7 is the calibration or microcontroller output that is connected to HF on the MCP3905A/06A devices. A LED is supplied to assist in any optical calibration schemes. 2.5.4... -
Page 15: Back Side Of Pcb Detailed Description
BACK SIDE OF PCB DETAILED DESCRIPTION 2.6.1 MCP3905A (U1) From the back side of the board, the MCP3905A/06A is located on the right hand side where the analog ground plane exists. The MCP3905A/06A has appropriate bypass capacitors on V coming from the DC power supply circuitry. The MCP3905A/06A has its input logic pins connected to user-selectable jumpers, with the exception of the HPF pin. - Page 16 MCP3905A/06A Energy Meter Reference Design NOTES: © 2009 Microchip Technology Inc. DS51565B-page 12...
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Page 17: Introduction
MCP3905A/06A ENERGY METER REFERENCE DESIGN Appendix A. Schematics and Layouts INTRODUCTION This appendix contains the following schematics and layouts for the MCP3905A/06A Energy Meter Reference Design: • Board Schematic • Board – Top Layer • Board – Bottom Layer SCHEMATICS AND PCB LAYOUT The layer order is shown in Figure A-1. -
Page 18: Board Schematic
MCP3905A/06A Energy Meter Reference Design BOARD SCHEMATIC © 2009 Microchip Technology Inc. DS51565B-page 14... -
Page 19: Board Layout - Top Layer
Schematics and Layouts BOARD LAYOUT – TOP LAYER BOARD LAYOUT – BOTTOM LAYER © 2009 Microchip Technology Inc. DS51565B-page 15... - Page 20 MCP3905A/06A Energy Meter Reference Design NOTES: © 2009 Microchip Technology Inc. DS51565B-page 16...
- Page 21 Suppressors;Clamping Voltage EPCOS SIOV-S20K275 Maximum:710V RoHS Compliant Bare PCB, — 104-00037 MCP3905A/06A Energy Meter Refer- ence Design R1-R4, R23 RES 1.00K OHM 1/8W 1% 1206 SMD Panasonic - ECG ERJ-8ENF1001V RES 300K OHM 1/2W 5% 2010 SMD Panasonic - ECG...
- Page 22 MCP3905A/06A Energy Meter Reference Design TABLE B-1: BILL OF MATERIALS (BOM) (CONTINUED) Reference Description Manufacturer Part Number RES 560 OHM 1/16W 5% 0402 SMD Panasonic - ECG ERJ-2GEJ561X R15, R16 RES 330K OHM 1/2W 5% 2010 SMD Panasonic - ECG...
- Page 23 Bill Of Materials (BOM) NOTES: © 2009 Microchip Technology Inc. DS51565B-page 19...
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Page 24: Appendix B. Bill Of Materials (Bom) Worldwide Sales And Service
Thailand - Bangkok Santa Clara, CA Tel: 86-29-8833-7252 Tel: 66-2-694-1351 Tel: 408-961-6444 Fax: 86-29-8833-7256 Fax: 66-2-694-1350 Fax: 408-961-6445 China - Zhuhai Toronto Tel: 86-756-3210040 Mississauga, Ontario, Fax: 86-756-3210049 Canada Tel: 905-673-0699 Fax: 905-673-6509 03/26/09 © 2009 Microchip Technology Inc. DS51565B-page 20...
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