MCP3909RD-1PH1 Microchip Technology, MCP3909RD-1PH1 Datasheet - Page 39

• 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

© 2009 Microchip Technology Inc.
EQUATION 5-6:
EQUATION 5-7:
The calculation for PHA_VA_GLSB is identical except that it uses the PHA_VA_RAW
register instead of PHA_W_RAW:
EQUATION 5-8:
Note:
Note:
Convert to 16-bit signed integer for compatibility with PIC18F85J90 register
and firmware calculations.
Convert to 16-bit signed integer for compatibility with PIC18F85J90 register
and firmware calculations.
PHA_VA_GLSB
PLSB = Value from Table 5-4 based on V
PHA_W_GLSB
=
=
------------------------------------------------------------ - 32768
⎛
⎝
------------------------------------------------------------ - 32768
⎛
⎝
------------------------------------------------------ -
64 LINE_CYC_NUM
------------------------------------------------------ -
64 LINE_CYC_NUM
•
•
PHA_W_RAW
PHA_VA_RAW
⎛
⎝
⎛
⎝
V
---------------- -
V
---------------- -
PLSB
PLSB
B
B
•
•
I
I
B
B
Meter Calibration
⎞
⎠
⎞
⎠
B
and I
⎞
⎠
MAX
⎞
⎠
•
•
values
DS51884A-page 39