ADE7878ACPZ Analog Devices Inc, ADE7878ACPZ Datasheet - Page 2

• Manufacturer Part Number: ADE7878ACPZ
• Description: IC ENERGY METERING 3PH 40LFCSP
• Manufacturer: Analog Devices Inc

Specifications of ADE7878ACPZ

• Input Impedance: 400 KOhm
• Measurement Error: 0.1%
• Voltage - I/o High: 2.4V
• Voltage - I/o Low: 0.4V
• Current - Supply: 22mA
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 40-WFQFN, CSP Exposed Pad
• Meter Type: 3 Phase
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: LFCSP
• No. Of Pins: 40
• Msl: MSL 1 - Unlimited
• Peak Reflow Compatible (260 C): Yes
• Supply Voltage Min: 3V
• Rohs Compliant: Yes
• Leaded Process Compatible: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADE7878
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 3
Functional Block Diagram .............................................................. 4
Specifications ..................................................................................... 5
Absolute Maximum Ratings .......................................................... 11
Pin Configuration and Function Descriptions ........................... 12
Typical Performance Characteristics ........................................... 14
Test Circuit ...................................................................................... 17
Terminology .................................................................................... 18
Power Management ........................................................................ 19
Theory of Operation ...................................................................... 24
Timing Characteristics ................................................................ 8
Thermal Resistance .................................................................... 11
ESD Caution ................................................................................ 11
PSM0—Normal Power Mode ................................................... 19
PSM1—Reduced Power Mode.................................................. 19
PSM2—Low Power Mode ......................................................... 19
PSM3—Sleep Mode .................................................................... 20
Power-Up Procedure .................................................................. 20
Hardware Reset ........................................................................... 21
Software Reset Functionality .................................................... 21
Analog Inputs .............................................................................. 24
Analog-to-Digital Conversion .................................................. 24
Current Channel ADC ............................................................... 25
di/dt Curent Sensor and Digital Integrator ............................. 27
Voltage Channel ADC ................................................................ 28
Changing Phase Voltage Datapath ........................................... 29
Power Quality Measurements ................................................... 29
Antialiasing Filter ................................................................... 25
ADC Transfer Function ......................................................... 25
Current Waveform Gain Registers ....................................... 26
Current Channel HPF ........................................................... 26
Current Channel Sampling ................................................... 27
Voltage Waveform Gain Registers ........................................ 28
Voltage Channel HPF ............................................................ 28
Voltage Channel Sampling .................................................... 28
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Phase Compensation ................................................................. 35
Reference Circuit ........................................................................ 37
Digital Signal Processor ............................................................. 37
Root Mean Square Measurement ............................................. 37
Active Power Calculation .......................................................... 41
Reactive Power Calculation ...................................................... 47
Apparent Power Calculation ..................................................... 52
Zero Crossing Detection ....................................................... 29
Zero-Crossing Timeout ......................................................... 30
Phase Sequence Detection .................................................... 30
Time Interval Between Phases ............................................. 31
Period Measurement .............................................................. 32
Phase Voltage Sag Detection ................................................. 32
Peak Detection ........................................................................ 33
Overvoltage and Overcurrent Detection ............................ 34
Neutral Current Mismatch ................................................... 35
Current RMS Calculation ..................................................... 38
Current Mean Absolute Value Calculation ......................... 39
Voltage Channel RMS Calculation ...................................... 40
Voltage RMS Offset Compensation ..................................... 41
Total Active Power Calculation ............................................ 41
Fundamental Active Power Calculation .............................. 43
Active Power Gain Calibration ............................................. 43
Active Power Offset Calibration .......................................... 43
Sign of Active Power Calculation ......................................... 43
Active Energy Calculation .................................................... 44
Integration Time Under Steady Load .................................. 45
Energy Accumulation Modes ............................................... 46
Line Cycle Active Energy Accumulation Mode ................. 46
Reactive Power Gain Calibration ......................................... 48
Reactive Power Offset Calibration ....................................... 48
Sign of Reactive Power Calculation ..................................... 48
Reactive Energy Calculation ................................................. 49
Integration Time Under A Steady Load .............................. 51
Energy Accumulation Modes ............................................... 51
Line Cycle Reactive Energy Accumulation Mode ............. 51
Apparent Power Gain Calibration ....................................... 53
Apparent Power Offset Calibration ..................................... 53