MCP3909RD-1PH1 Microchip Technology, MCP3909RD-1PH1 Datasheet - Page 9

• 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

1.1
© 2009 Microchip Technology Inc.
INTRODUCTION
The MCP3909/PIC18F85J90 Single Phase Energy Meter Reference Design is a fully
functional single phase meter. The design is intended to be low cost and is
transformerless. The design uses a half-wave rectified power supply circuit and a shunt
current sensing element. A single MCP3909 acts as the analog front end measurement
circuitry. The PIC18F85J90 directly drives the LCD glass and displays active energy
consumption.
The meter design contains serially accessible registers and is intended to be flexible
and upgraded to a variety of PIC
firmware presented herein. The “Single Phase Energy Meter Software” offers a
functional and simple means to monitor and control the PIC18F85J90 and can be used
to create custom calibration setups. In some situations, only a single point calibraton
may be required. The energy meter software offers an automated step by step
calibration process that can be used to quickly calibrate energy meters.
FIGURE 1-1:
Design.
Chapter 1. Product Overview
MCP3909/PIC18F85J90 SINGLE PHASE
ENERGY METER REFERENCE DESIGN
MCP3909/PIC18F85J90 Single Phase Energy Meter Reference
®
micro-based energy meter designs using the
DS51884A-page 9