MCP3909-I/SS Microchip Technology, MCP3909-I/SS Datasheet - Page 38

• Manufacturer Part Number: MCP3909-I/SS
• Description: IC POWER METERING-1 PHASE 24SSOP
• Manufacturer: Microchip Technology

Specifications of MCP3909-I/SS

• Package / Case: 24-SSOP (0.200", 5.30mm Width)
• Input Impedance: 390 KOhm
• Measurement Error: 0.1%
• Voltage - I/o High: 2.4V
• Voltage - I/o Low: 0.85V
• Current - Supply: 2.3mA
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Meter Type: Single Phase
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Supply Voltage Range: 4.5V To 5.5V
• Digital Ic Case Style: SSOP
• No. Of Pins: 24
• Interface Type: Serial, SPI
• Supply Voltage Max: 5.5V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP3909EV-MCU16 - EVALUATION BOARD FOR MCP3909MCP3909RD-3PH1 - REF DESIGN MCP3909 3PH ENGY MTR
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP3909 / dsPIC33F 3-Phase Energy Meter Reference Design
3.8
TABLE 3-3:
DS51723A-page 38
main.h
main.c
global.h
global.c
MCP390x.h
MCP390x.c
calcu.h
calcu.c
uart_comm.c
uart.c
Calibrate.c
Calibrate.h
Adc.c
Adc.h
I2Csubs.h
I2Csubs.c
interrupt.h
interrupt.c
Asmcode.c
File Name
DESCRIPTION OF PROJECT FILES
FILE DESCRIPTION
Main program
Mainly define important system macros, key data structures, and declare global variables.
Declare macros, constants, local global variables, some of the global variables and functions
used in the MCP390X device.
Functions involved with the MCP390X device, including set SPI, initialize the MCP390X device
and read data.
Declare macros, constants, local global variables, some of the global variables and functions
used in calcu.c.
Main module to calculate parameters, including calculate frequencies, current/voltage RMS,
power, power factors and energy, and analyze harmonics.
Declare macros, constants, local global variables, some of the global variables and functions
used in uart.c.
Receive, transmit, process protocol and so forth for UART communication.
Program for Ratio error calibration, power calibration and phase lag calibration, it stores and
initializes calibration data.
Declare constants, local variables and global variables used in calibration.
On-chip ADC operation, detecting the current of neutral wire.
Control EEPROM of off-chip I
Declare macros, constants, local global variables, some of the global variables and functions
used in interrupt.c.
Set interrupts and ISRs.
Some assemble functions used in calculation.
2
C interface.
Description
© 2009 Microchip Technology Inc.