71M6543GHT datasheet(5/75 Pages) MAXIM

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Maxim Integrated │ 5

71M6543FT/71M6543HT/

71M6543GT/71M6543GHT

Energy Meter ICs

www.maximintegrated.com

LIST OF FIGURES

Figure1.I/OEquivalentCircuits ................................................................. 18

Figure 2. 71M6543FT/HT/GT/GHT Operating with Local Sensors ....................................... 21

Figure 3. 71M6543FT/HT/GT/GHT Operating with Remote Sensor for Neutral Current....................... 22

Figure4.MultiplexerSequencewithNeutralChannelandRemoteSensors ............................... 23

Figure5.MultiplexerSequencewithNeutralChannelandCurrentTransformers ........................... 24

Figure 6. Typical LCD Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 7. Optical Interface (UART1)............................................................... 37

Figure 8. Waveforms Comparing Voltage, Current, Energy per Interval, and Accumulated Energy ..............41

Figure 9. Typical Voltage Sense Circuit Using Resistive Divider......................................... 42

Figure 10. Typical Current-Sense Circuit Using Current Transformer in a Single-Ended Configuration .......... 42

Figure 11. Typical Current-Sense Circuit Using Current Transformer in a Differential Configuration ............. 43

Figure 12. Typical Current-Sense Circuit Using Shunt in a Differential Configuration ........................ 43

Figure 13. 71M6543FT/HT/GT/GHT Typical Operating Circuit Using Locally Connected Sensors .............. 44

Figure 14. 71M6543FT/HT/GT/GHT Typical Operating Circuit Using Remote Neutral Current Sensor ........... 45

Figure 15. Typical I2C Operating Circuit ........................................................... 47

Figure 16. Typical UART Operating Circuit ......................................................... 47

Figure 17. Typical Reset Circuits ................................................................. 47

Figure 18. Optical Interface Typical Operating Circuit................................................. 47

Figure 19. Typical Emulator Connections .......................................................... 47

Figure 20. CE Data Flow—Multiplexer and ADC..................................................... 71

Figure 21. CE Data Flow—Offset, Gain, and Phase Compensation...................................... 72

Figure 22. CE Data Flow—SquaringandSummation................................................. 72

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