MCP3909RD-1PH1 Microchip Technology, MCP3909RD-1PH1 Datasheet - Page 3

• Manufacturer Part Number: MCP3909RD-1PH1
• Description: BOARD DES MCP3909 ENERGY METER
• Manufacturer: Microchip Technology

Specifications of MCP3909RD-1PH1

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MCP3909, PIC18F85J90
• Primary Attributes: Single Phase Shunt Energy Meter
• Secondary Attributes: 16 Bit ADC
• Ic Function: Single Phase Energy Measurement IC
• Supply Voltage Range: 4.5V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: SSOP
• No. Of Pins: 24
• Interface Type: SPI
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Preface ........................................................................................................................... 5
Chapter 1. Product Overview
Chapter 2. Hardware
Chapter 3. PIC18F85J90 Calculation and Register Description
Chapter 4. Meter Protocol and Timings
Chapter 5. Meter Calibration
© 2009 Microchip Technology Inc.
Introduction............................................................................................................ 5
Document Layout .................................................................................................. 6
Conventions Used in this Guide ............................................................................ 7
Recommended Reading........................................................................................ 8
The Microchip Web Site ........................................................................................ 8
Customer Support ................................................................................................. 8
Document Revision History ................................................................................... 8
1.1 Introduction ..................................................................................................... 9
1.2 What the MCP3909/PIC18F85J90 Single Phase Energy Meter Reference
1.3 Getting Started ............................................................................................. 11
2.1 Input and Analog Front End ......................................................................... 13
2.2 Power Supply Circuit .................................................................................... 14
2.3 Microcontroller connections .......................................................................... 15
3.1 Register Overview ........................................................................................ 17
3.2 active energy calculation .............................................................................. 18
3.3 Complete Register List ................................................................................. 19
3.4 Configuration And Output Registers ............................................................. 20
3.5 Calibration Registers .................................................................................... 27
4.1 PIC18F85J90 Protocol ................................................................................. 31
5.1 Calibration Overview .................................................................................... 33
5.2 Active Power Signal Flow and Calibration .................................................... 35
5.3 RMS Current, RMS Voltage, Apparent Power Signal Flow and Calibration . 36
Design Kit Includes ................................................................................. 10
Table of Contents
MCP3909/PIC18F85J90 SINGLE PHASE
ENERGY METER REFERENCE DESIGN
DS51884A-page 3