MCP3905A/06A ENERGY METER
REFERENCE DESIGN
©
2009 Microchip Technology Inc.
DS51565B-page 7
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The MCP3905A/06A Energy Meter Reference Design is a stand-alone, single-phase
residential meter design for active-energy meter designs. For advanced
microcontroller-based meter products, this design also serves as the design of the
Analog Front-End (AFE). This design includes a low-cost DC power supply circuit and
the necessary protection for IEC62053 EMC compliance.
FIGURE 2-1:
MCP3905A Stand-Alone Energy Meter and
Microcontroller-Based Energy Meter Using MCP3905A AFE Design.
For more detailed information regarding design decisions and an approach to
IEC62053 compliance using the circuitry in this board, refer to AN994
“IEC Compliant
Active Energy Meter Design Using The MCP3905A/06A”
(DS00994).
2.2
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
• 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 IEC62053 accuracy
compliance for small shunt values
• Low-cost design
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current-sensing
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CLASS 1 METER 5(40)a
POWER = 1432 KW
ENERGY = 43213 kWh
28/03/2004
15:23:23
Analog
Digital
PICmicro
®
REFERENCE DESIGN
MCP3905A Stand-Alone Mechanical Counter
Energy Meter
Microcontroller-based LCD Energy Meter
1000 imp/kWh
CLASS 1 METER
5(40)a
MCU
MCP3905A/06A
MCP3905A/06A
MCP3905A/06A