ADE7953

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    Single Phase, Multifunction Metering IC with Neutral Current Measurement Data Sheet ADE7953   Rev. C   Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.Tel: 781.329.4700 ©2011–2016 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com  FEATURES Highly accurate; supports EN 50470-1, EN 50470-3, IEC 62053-21, IEC 62053-21, IEC 62053-22, and IEC 62053-23 standards Measures active, reactive, and apparent energy; sampled waveform; current and voltage rms Provides a second current input for neutral current measurement Less than 0.1% error in active and reactive energy measurements over a dynamic range of 3000:1 Less than 0.2% error in instantaneous IRMS measurement over a dynamic range of 1000:1 Provides apparent energy measurement and instantaneous power readings 1.23 kHz bandwidth operation Flexible PGA gain stage (up to ×22) Includes internal integrators for use with Rogowski coil sensors SPI, I 2 C, or UART communication GENERAL DESCRIPTION The ADE7953 is a high accuracy electrical energy measurement IC intended for single phase applications. It measures line voltage and current and calculates active, reactive, and apparent energy, as well as instantaneous rms voltage and current. The device incorporates three Σ-Δ ADCs with a high accuracy energy measurement core. The second input channel simulta-neously measures neutral current and enables tamper detection and neutral current billing. The additional channel incorporates a complete signal path that allows a full range of measurements. Each input channel supports independent and flexible gain stages, making the device suitable for use with a variety of current sensors such as current transformers (CTs) and low value shunt resistors. Two on-chip integrators facilitate the use of Rogowski coil sensors. The ADE7953 provides access to on-chip meter registers via a  variety of communication interfaces including SPI, I 2 C, and UART. Two configurable low jitter pulse output pins provide outputs that are proportional to active, reactive, or apparent energy, as well as current and voltage rms. A full range of power quality information such as overcurrent, overvoltage, peak, and sag detection are accessible via the external IRQ pin. Independent active, reactive, and apparent no-load detections are included to prevent “meter creep.” Dedicated reverse power (REVP), zero-crossing voltage (ZX), and zero-crossing current (ZX_I) pins are also provided. The ADE7953 energy metering IC operates from a 3.3 V supply voltage and is available in a 28-lead LFCSP package. FUNCTIONAL BLOCK DIAGRAM IAPIANVPVNIBPIBN ADE7953 AGNDDGNDCS SCLKCLKINREF RESET VDD VINTA VINTDCLKOUTREVPZXCF2CF1ZX_I         0        9        3        2        0    -        0        0        1 IRQPGAPGAPGA1.2V REFX 2 AIRMSLPFAIRMSOSX 2 AVRMSLPFLPF VRMSOSAVAGAINAWGAIN AWATTOSAVARGAIN AVAROSDFCCF1DEN : DFCCF2DEN :  VGAINAPHCALHPFAIGAINDIGITALINTEGRATORHPFADCADCADCACTIVE, REACTIVEANDAPPARENT ENERGIES ANDVOLTAGE/CURRENT RMSCALCULATION FOR PHASE B(SEE PHASE A FOR DETAILEDDATA PATH).COMPUTATIONALBLOCK FOR TOTALREACTIVE POWERCONFIGURATIONAND CONTROLUART SPI INTERFACE I 2 CREVPZXZX_IPEAKANGLEPOWER FACTORSAGLOWNOISEPRE-AMPPHASEAAND BDATAMISO/SDA/TxMOSI/SCL/Rx  Figure 1.  ADE7953* PRODUCT PAGE QUICK LINKS Last Content Update: 02/23/2017 COMPARABLE PARTS View a parametric search of comparable parts. EVALUATION KITS ã ADE7953 Evaluation Board DOCUMENTATION Application Notes ã AN-1118: Calibrating a Single-Phase Energy Meter Based on the ADE7953 ã AN-1367: I2C Interface Between the ADE7953 and the ADuCM360 ã AN-639: Frequently Asked Questions (FAQs) Analog Devices Energy (ADE) Products Data Sheet ã ADE7953: Single Phase, Multifunction Metering IC with Neutral Current Measurement Data Sheet Product Highlight ã ADE7953: Single-Phase Multifunction Energy Metering IC with Neutral Current Measurement Overview User Guides ã UG-194: Evaluation Board for the ADE7953 Single Phase Energy Metering IC REFERENCE MATERIALS Informational ã Wireless Sensor Network (WSN) Demo System DESIGN RESOURCES ã ADE7953 Material Declaration ã PCN-PDN Information ã Quality And Reliability ã Symbols and Footprints DISCUSSIONS View all ADE7953 EngineerZone Discussions. SAMPLE AND BUY Visit the product page to see pricing options. TECHNICAL SUPPORT Submit a technical question or find your regional support number. DOCUMENT FEEDBACK Submit feedback for this data sheet. This page is dynamically generated by Analog Devices, Inc., and inserted into this data sheet. A dynamic change to the content on this page will not trigger a change to either the revision number or the content of the product data sheet. This dynamic page may be frequently modified.  ADE7953 Data Sheet Rev. C | Page 2 of 72 TABLE OF CONTENTS Features .....................................................................................1   General Description ..................................................................1   Functional Block Diagram.........................................................1   Revision History ........................................................................3   Specifications .............................................................................4   Timing Characteristics...........................................................6   Absolute Maximum Ratings ......................................................8   ESD Caution ..........................................................................8   Pin Configuration and Function Descriptions...........................9   Typical Performance Characteristics .......................................11   Test Circuit ..............................................................................16   Terminology ............................................................................17   ADE7953 Power-Up Procedure ...............................................18   Required Register Setting.....................................................18   Theory of Operation................................................................19   Analog Inputs ......................................................................19   Analog-to-Digital Conversion .............................................19   Current Channel ADCs .......................................................21   Voltage Channel ADC..........................................................21   Reference Circuit .................................................................22   Root Mean Square Measurement.............................................23   Current Channel RMS Calculation ......................................23   Voltage Channel RMS Calculation .......................................23   Active Power Calculation.........................................................24   Sign of Active Power Calculation .........................................25   Active Energy Calculation....................................................25   Active Energy Accumulation Modes....................................27   Reactive Power Calculation .....................................................28   Sign of Reactive Power Calculation......................................28   Reactive Energy Calculation ................................................29   Reactive Energy Accumulation Modes ................................30   Apparent Power Calculation ....................................................31   Apparent Energy Calculation...............................................31   Ampere-Hour Accumulation ...............................................32   Energy-to-Frequency Conversion............................................33   Pulse Output Characteristics................................................33   Energy Calibration...................................................................34   Gain Calibration ..................................................................34   Phase Calibration .................................................................34   Offset Calibration ................................................................35   Period Measurement ............................................................... 36   Instantaneous Powers and Waveform Sampling ...................... 37   Power Factor ........................................................................... 38   Using the Line Cycle Accumulation Mode to Determine the Power Factor........................................................................ 38   Power Factor with No-Load Detection ................................ 38   Angle Measurement............................................................. 39   No-Load Detection.................................................................. 40   Setting the No-Load Thresholds .......................................... 40   Active Energy No-Load Detection....................................... 40   Reactive Energy No-Load Detection ................................... 41   Apparent Energy No-Load Detection .................................. 41   Zero-Crossing Detection ......................................................... 43   Zero-Crossing Output Pins.................................................. 43   Zero-Crossing Interrupts..................................................... 43   Zero-Crossing Timeout ....................................................... 44   Zero-Crossing Threshold..................................................... 44   Voltage Sag Detection.............................................................. 45   Setting the SAGCYC Register .............................................. 45   Setting the SAGLVL Register ............................................... 45   Voltage Sag Interrupt ........................................................... 45   Peak Detection ........................................................................ 46   Indication of Power Direction ................................................. 47   Reverse Power...................................................................... 47   Sign Indication .................................................................... 47   Overcurrent and Overvoltage Detection ................................. 48   Setting the OVLVL and OILVL Registers ............................ 48   Overvoltage and Overcurrent Interrupts ............................. 48   Alternative Output Functions.................................................. 49   ADE7953 Interrupts ................................................................ 50   Primary Interrupts (Voltage Channel and Current Channel A) .......................................................................... 50   Current Channel B Interrupts.............................................. 50   Communicating with the ADE7953 ........................................ 51   Communication Autodetection ........................................... 51   Locking the Communication Interface ................................ 51   SPI Interface ........................................................................ 52   I 2 C Interface......................................................................... 53   UART Interface.................................................................... 55   Communication Verification and Security .............................. 57    Data Sheet ADE7953   Rev. C | Page 3 of 72 Write Protection .......................................................................... 57   Communication Verification ..................................................... 57   Checksum Register ..................................................................... 58   ADE7953 Registers ......................................................................... 60   ADE7953 Register Descriptions ............................................... 62   Layout Guidelines ........................................................................... 68   Outline Dimensions ........................................................................ 69   Ordering Guide ........................................................................... 69   REVISION HISTORY 12/2016—Rev. B to Rev. C Changed CP-28-6 to CP-28-10 .................................... Throughout Changes to Figure 4 ........................................................................... 9 Changes to Period Measurement Section .................................... 36 Updated Outline Dimensions ........................................................ 69 Changes to Ordering Guide ........................................................... 69 11/2013—Rev. A to Rev. B Changes to Features Section ............................................................ 1 Changed Input Clock Frequency from 3.58 MHz (Max) to 3.54 MHz (Min)/3.58 MHz (Typ)/3.62 MHz (Max) .................... 5 Changed t DAV  from 80 ns (Min) to 80 ns (Max) ............................ 6 Changed t HD;DAT  (Min) from 0 µs to 0.1 µs ..................................... 7 Changes to EPAD Note..................................................................... 9 Changes to Figure 35 ...................................................................... 16 Changes to Current Channel ADCs Section and Voltage Channel ADC Section .................................................................... 21 Changes to Figure 45 ...................................................................... 24 Changes to Figure 46 ...................................................................... 25 Changes to Current Channel Gain Adjustment Section ............ 34 Changes to RMS Offsets Section ................................................... 35 Changes to Equation 37 .................................................................. 38 Changes to First Paragraph in No-Load Detection Section ...... 40 Changes to Communication Autodetection Section and Locking the Communication Interface Section .......................... 51 Changes to I 2 C Interface Section ................................................... 53 Changes to Write Protection Section ............................................ 57 Changes to Figure 76 ...................................................................... 58 Changes to Table 12 ........................................................................ 59 Changes to Table 13 and Table 14 ................................................. 60 Changes to Table 15 ........................................................................ 61 Changes to Table 18 ........................................................................ 62 Added Layout Guidelines Section ................................................. 68 Updated Outline Dimensions ........................................................ 69 11/2011—Rev. 0 to Rev. A Changes to Figure 1 .......................................................................... 1 Changes to Table 1 ............................................................................ 3 Changes to Absolute Maximum Ratings Section ......................... 8 Changes to Table 5 ............................................................................ 9 Replaced Typical Performance Characteristics Section ............. 11 Changes to Figure 35 ...................................................................... 16 Added ADE7953 Power-Up Procedure Section ......................... 18 Changes to Voltage Channel Section ............................................ 19 Changes to Current Channel RMS Calculation Section and Voltage Channel RMS Calculation Section ................................. 23 Changes to Active Power Calculation Section ............................ 24 Changes to Active Energy Integration Time Under Steady Load Section .................................................................................... 25 Changes to Reactive Power Calculation Section ........................ 28 Changes to Reactive Energy Integration Time Under Steady Load Section .................................................................................... 29 Changes to Figure 65 ...................................................................... 47 Changes to Write Protection Section ........................................... 57 Replaced Checksum Register Section and added Figure 75 and Figure 76 ........................................................................................... 58 Changes to Table 12 ........................................................................ 59 Changes to Table 14 ........................................................................ 60 Changes to Table 15 ........................................................................ 61 Replaced Interrupt Enable Section and Interrupt Status Registers Section ............................................................................. 66 2/2011—Revision 0: Initial Version
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