MCP3909RD-1PH1 Microchip Technology, MCP3909RD-1PH1 Datasheet - Page 35

• 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

5.2
FIGURE 5-1:
© 2009 Microchip Technology Inc.
VOLTAGE
CURRENT
ADC
MCP3909
ADC
ACTIVE POWER SIGNAL FLOW AND CALIBRATION
ENERGY_W_L_RAW:48
ENERGY_W_L:32
ENERGY_W_Z:64
PHA_W:32
ENERGY_W:64
5.2.1
The active power signal flow leads to the CF output pulse frequency, which is
proportional to the total active power being measured by the energy meter, the active
energy registers, which are in units of kWh and can also be phase gated using the
MODE1 register, and the active power output register (PHA_W).
Table 5-1 represents the registers being set during active power calibration.
TABLE 5-1:
Active Power Signal Path showing Output and Calibration Registers.
PHy_DELAY:8
ENERGY_W_GLSB
Register Name
PHA_W_GLSB
PHA_W_OFF
PHA_DELAY
CFNUM
CFDEN
ENERGY_W_GLSB:16 (NOT IMPLEMENTED)
Φ
Active Power Calibration Overview and Signal Path
kWh
kW
CALIBRATION REGISTERS GENERATED THROUGH THIS ROUTINE
PHA_W_GLSB:16
X
X
PHA_W_OFF:32
X
Note 1:
PERIOD:16 (INTERNAL REGISTER)
Not Implemented
Σ
Section 5.3.3
Section 5.3.3
Section 5.3.5
Section 5.3.7
Section 5.3.3
Equations
This absolute value is controlled by the MODE1
register. See Section 3.4.1 for more information.
X
PHA_W_RAW:48
NOTE 1
|X|
Meter Calibration
CFNUM:16
Configurations Needed
C1 ONLY
C1 ONLY
C1 ONLY
C1 ONLY
Frequency
FREQUENCY!
Converter
C1, C2
C1, C3
Digital to
CF OUTPUT
DS51884A-page 35
/
CFDEN:8