MCP3909RD-3PH1 Microchip Technology, MCP3909RD-3PH1 Datasheet - Page 3

• Manufacturer Part Number: MCP3909RD-3PH1
• Description: REF DESIGN MCP3909 3PH ENGY MTR
• Manufacturer: Microchip Technology

Specifications of MCP3909RD-3PH1

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: No
• Utilized Ic / Part: MCP3909, PIC18F2520, PIC18F4550
• Primary Attributes: 3-Ph, 220 VAC, In Case, LCD, USB, GUI
• Secondary Attributes: Opto-Isolated Interface for Safety
• Operating Voltage: 220 V
• Operating Current: 5 A
• Description/function: Energy Meter
• For Use With/related Products: MCP3909
• Lead Free Status / RoHS Status: Not applicable / Not applicable

Preface ........................................................................................................................... 7
Chapter 1. Meter Overview
Chapter 2. Hardware Description
Chapter 3. Firmware
Chapter 4. Meter Calibration
© 2009 Microchip Technology Inc.
Introduction............................................................................................................ 7
Document Layout .................................................................................................. 8
Conventions Used in this Guide ............................................................................ 9
Recommended Reading...................................................................................... 10
The Microchip Web Site ...................................................................................... 10
Customer Support ............................................................................................... 10
Document Revision History ................................................................................. 10
1.1 Introduction ................................................................................................... 11
1.2 Meter Design Parameters ............................................................................ 11
1.3 Power Calculations ....................................................................................... 12
1.4 Getting Started ............................................................................................. 13
2.1 Overview ...................................................................................................... 17
2.2 Analog Front End Circuitry ........................................................................... 18
2.3 Analog-To-Digital Conversion ...................................................................... 20
2.4 dspic33f Hardware Connection And Peripheral Usage ................................ 22
2.5 Power Supply ............................................................................................... 25
3.1 Overview ...................................................................................................... 27
3.2 Main Loop ..................................................................................................... 27
3.3 Calculation() - Calculating Electrical Parameters ......................................... 29
3.4 ADC Sampling Scheme For Calculations .................................................... 33
3.5 ReadING A/D Data Of The MCP3909 Device .............................................. 35
3.6 Communication Of UART Interface .............................................................. 37
3.7 Resource Configuration ................................................................................ 37
3.8 Description Of Project Files .......................................................................... 38
4.1 Introduction ................................................................................................... 39
4.2 Current/voltage Calibration .......................................................................... 39
4.3 Apparent Power Calibration ......................................................................... 40
4.4 Phase Lag Calibration ................................................................................. 41
ENERGY METER REFERENCE DESIGN
Table of Contents
MCP3909 / dsPIC33F 3-PHASE
DS51723A-page 3