78M6612-IMR/F Maxim Integrated Products, 78M6612-IMR/F Datasheet - Page 5

• Manufacturer Part Number: 78M6612-IMR/F
• Description: IC POWER MEASUREMENT AC 68-QFN
• Manufacturer: Maxim Integrated Products

Specifications of 78M6612-IMR/F

• Mounting Style: SMD/SMT
• Package / Case: QFN-68
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS_6612_001
Figures
Figure 1: IC Functional Block Diagram ..................................................................................................... 7
Figure 2: General Topology of a Chopped Amplifier ............................................................................... 10
Figure 3: AFE Block Diagram ................................................................................................................ 11
Figure 4: Samples from Multiplexer Cycle .............................................................................................. 14
Figure 5: Accumulation Interval .............................................................................................................. 15
Figure 6: Interrupt Structure ................................................................................................................... 39
Figure 7: Optical Interface ...................................................................................................................... 42
Figure 11: 3-Wire Interface. Read Command ........................................................................................ 48
Figure 12: 3-Wire Interface. Write Command when CNT=0 .................................................................. 48
Figure 13: 3-Wire Interface. Write Command when HiZ=1 and WFR=1 ................................................ 48
Figure 14: Functions Defined by V1 ....................................................................................................... 49
Figure 15: Voltage. Current, Momentary and Accumulated Energy ....................................................... 51
Figure 16: Timing Relationship between ADC MUX, Compute Engine, and Serial Transfers .................. 52
Figure 17: RTM Output Format .............................................................................................................. 52
Figure 18: Operation Modes State Diagram ........................................................................................... 55
Figure 19: Functional Blocks in BROWNOUT Mode (inactive blocks grayed out) ................................... 56
Figure 20: Functional Blocks in LCD Mode (inactive blocks grayed out) ................................................. 57
Figure 21: Functional Blocks in SLEEP Mode (inactive blocks grayed out) ............................................. 58
Figure 24: Power-Up Timing with VBAT Only ......................................................................................... 60
Figure 25: MPU/CE Data Flow ............................................................................................................... 61
Figure 26: MPU/CE Communication ...................................................................................................... 62
Figure 27: Resistive Voltage Divider (Left), Current Transformer (Right) ................................................. 63
Figure 28: Resistive Shunt ..................................................................................................................... 63
Figure 29: Crystal Frequency over Temperature ..................................................................................... 65
Figure 30: Crystal Compensation ........................................................................................................... 66
Figure 31: Connecting LCDs ................................................................................................................. 67
Figure 32: I
Figure 33: 3-Wire EEPROM Connection ................................................................................................ 70
Figure 34: Connections for the RX Pin ................................................................................................... 70
Figure 35: Connection for Optical Components ...................................................................................... 71
Figure 36: Voltage Divider for V1 ........................................................................................................... 72
Figure 37: External Components for RESET: Development Circuit (Left), Production Circuit (Right) ....... 72
Figure 38: External Components for the Emulator Interface ................................................................... 73
Figure 39: Wh Accuracy, 10 mA to 20 A at 120 V/60 Hz and Room Temperature Using a 4 mΩ
Figure 40: Measurement Accuracy over Harmonics at 240 V, 30A per IEC62053-2x Section 8.2.1
Figure 41: Typical Measurement Accuracy over Temperature Relative to 25°C ...................................... 99
Figure 42: 64-Pin LQFP Pinout ........................................................................................................... 100
Figure 43: 68-Pin QFN Pinout ............................................................................................................. 103
Rev. 1.2
Figure 8: Connecting an External Load to DIO Pins ............................................................................... 44
Figure 9: 3-Wire Interface. Write Command, HiZ=0 .............................................................................. 47
Figure 10: 3-Wire Interface. Write Command, HiZ=1 ............................................................................ 48
Figure 22: Transition from BROWNOUT to MISSION Mode when System Power Returns ..................... 59
Figure 23: Power-Up Timing with V3P3SYS and VBAT Tied Together ................................................... 59
2
C EEPROM Connection ..................................................................................................... 70
Current Shunt ..................................................................................................... 98
........................................................................................................................... 98
78M6612 Data Sheet
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