MCP3909RD-3PH3 Microchip Technology, MCP3909RD-3PH3 Datasheet - Page 51

• Manufacturer Part Number: MCP3909RD-3PH3
• Description: REF DESIGN FOR MCP3909 W/18F2520
• Manufacturer: Microchip Technology

Specifications of MCP3909RD-3PH3

• Main Purpose: Power Management, Energy/Power Meter
• Utilized Ic / Part: MCP3909, PIC18F2520, PIC18F4550
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

© 2008 Microchip Technology Inc.
5.3.5
The following equations apply for calculating the gain matching in between phases.
The notation “<S>” is used for the standard phase measurement, thus the
PH<S>_W_RAW number is read from the standard phase register, STAND_W_RAW,
that was recorded during the standard phase calibration.
The notation “<Un>” represents the value for the phase being matched to the standard
phase.
For active power gain matching:
EQUATION 5-9:
For apparent power gain matching:
EQUATION 5-10:
Note:
Note:
Gain Matching Equations
Convert to 16-bit signed integer for compatibility with 18F2520 register and
firmware calculations.
Convert to 16-bit signed integer for compatibility with 18F2520 register and
firmware calculations.
PHY_W_GAIN
PHY_VA_GAIN
=
=
⎛
⎝
STAND_W_RAW
---------------------------------------- -
⎛
⎝
PHY_W_RAW
STAND_W_RAW
---------------------------------------- -
PHY_VA_RAW
Meter Calibration
⎞
⎠
⎞
⎠
•
•
16384
16384
DS51643B-page 47