MCP3909EV-MCU16 Microchip Technology, MCP3909EV-MCU16 Datasheet - Page 3

• Manufacturer Part Number: MCP3909EV-MCU16
• Description: EVALUATION BOARD FOR MCP3909
• Manufacturer: Microchip Technology

Specifications of MCP3909EV-MCU16

• Number Of Adc's: 2
• Number Of Bits: 16
• Sampling Rate (per Second): 15k
• Data Interface: Serial
• Inputs Per Adc: 1 Differential
• Input Range: ±1 V
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: MCP3909
• Silicon Manufacturer: Microchip
• Application Sub Type: ADC
• Kit Application Type: Data Converter
• Silicon Core Number: MCP3909
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Preface ........................................................................................................................... 7
Chapter 1. Meter Overview
Chapter 2. Hardware Description
Chapter 3. Firmware
Chapter 4. Meter Calibration
© 2009 Microchip Technology Inc.
Introduction............................................................................................................ 7
Document Layout .................................................................................................. 8
Conventions Used in this Guide ............................................................................ 9
Recommended Reading...................................................................................... 10
The Microchip Web Site ...................................................................................... 10
Customer Support ............................................................................................... 10
Document Revision History ................................................................................. 10
1.1 Introduction ................................................................................................... 11
1.2 Meter Design Parameters ............................................................................ 11
1.3 Power Calculations ....................................................................................... 12
1.4 Getting Started ............................................................................................. 13
2.1 Overview ...................................................................................................... 17
2.2 Analog Front End Circuitry ........................................................................... 18
2.3 Analog-To-Digital Conversion ...................................................................... 20
2.4 dspic33f Hardware Connection And Peripheral Usage ................................ 22
2.5 Power Supply ............................................................................................... 25
3.1 Overview ...................................................................................................... 27
3.2 Main Loop ..................................................................................................... 27
3.3 Calculation() - Calculating Electrical Parameters ......................................... 29
3.4 ADC Sampling Scheme For Calculations .................................................... 33
3.5 ReadING A/D Data Of The MCP3909 Device .............................................. 35
3.6 Communication Of UART Interface .............................................................. 37
3.7 Resource Configuration ................................................................................ 37
3.8 Description Of Project Files .......................................................................... 38
4.1 Introduction ................................................................................................... 39
4.2 Current/voltage Calibration .......................................................................... 39
4.3 Apparent Power Calibration ......................................................................... 40
4.4 Phase Lag Calibration ................................................................................. 41
ENERGY METER REFERENCE DESIGN
Table of Contents
MCP3909 / dsPIC33F 3-PHASE
DS51723A-page 3