MCP3909-I/SS Microchip Technology, MCP3909-I/SS Datasheet - Page 4

• 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
Chapter 5. PC Software
Chapter 6. Meter Communications Protocol
Appendix A. Schematics and Layouts
Appendix B. Bill Of Materials (BOM)
Appendix C. Power Calculation Theory
DS51723A-page 4
5.1 Overview And Installation ............................................................................. 43
5.2 Establish Communication ............................................................................. 44
5.3 Basic Parameters Output Screen ................................................................. 45
5.4 Phase A/B/C Harmonic Output Screen ........................................................ 45
5.5 Distortion Rate .............................................................................................. 46
5.6 Harmonic Power ........................................................................................... 46
5.7 Energy Accumulation ................................................................................... 47
5.8 Calibration Step 1 - Reset All Calibration ..................................................... 47
5.9 Linearity Calibration ...................................................................................... 48
5.10 Apparent Power Calibration ....................................................................... 49
5.11 Phase Lag Calibration ................................................................................ 50
6.1 Introduction ................................................................................................... 51
6.2 Test Connection Command .......................................................................... 52
6.3 Total Data Request ...................................................................................... 52
6.4 Status Register ............................................................................................. 54
6.5 Harmonic Content Command ....................................................................... 54
6.6 Total Harmonic Distortion (THD) Command ................................................ 55
6.7 Start Energy Measurement Command ......................................................... 56
6.8 Stop Energy Measurement Command ......................................................... 56
6.9 Harmonic Power Command ......................................................................... 57
6.10 Calibrate Meter Voltage/current Command ................................................ 58
6.11 Calibrate Phase Lag Command ................................................................. 59
6.12 Calibrate Apparent Power Command ......................................................... 59
6.13 Calibrate Energy Pulse Command ............................................................. 60
6.14 Reset All Meter Calibration Values Command ........................................... 60
6.15 Calibrate Meter Constant (Energy Pulse Output Constant) ....................... 61
A.1 Introduction .................................................................................................. 63
A.2 Schematics And Pcb Layout ........................................................................ 63
C.1 Overview ...................................................................................................... 75
C.2 Synchronous Sampling And Quasi-synchronous Sampling ........................ 75
C.3 The Harmonic Analysis Algorithm Of Quasi-synchronous Sampling ........... 82
C.4 Measuring The Voltage/current Rms Value And Power Using Quasi-synchro-
C.5 Measuring Frequency .................................................................................. 87
C.6 Improving Measurement Precision Of Quasi-synchronous Sampling Algorithm
C.7 Measuring Secondary Parameters .............................................................. 91
C.8 Apparent Power Of Each Phase And Total Apparent Power ....................... 91
C.9 Power Factor Of Each Phase And Total Power Factor ............................... 91
nous Sampling Algorithm ........................................................................ 84
................................................................................................................. 89
© 2009 Microchip Technology Inc.