MCP3909RD-1PH1 Microchip Technology, MCP3909RD-1PH1 Datasheet - Page 18

• 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

MCP3909/PIC18F85J90 Single Phase Energy Meter Reference Design
3.2
FIGURE 3-1:
DS51884A-page 18
ACTIVE ENERGY CALCULATION
CURRENT
VOLTAGE
PGA
MCP3909
Active Energy is described through the process described in Figure 3-1. The calibration
registers for each calculation are shown as well as the output registers.
Active Energy Calculation.
ADC
ADC
Φ
X
PHA_W_RAW:48
CF_NUM:16
PHA_DELAY:8
1
/
CF OUTPUT
FREQUENCY ON PIN
Digital to
Frequency
Converter
PHA_W_OFF:32
kWh (Displayed on LCD)
Σ
© 2009 Microchip Technology Inc.
X
ENERGY_W_L:64
X
X
2