Data Sheet
FEATURES
Single Phase, Multifunction Metering IC
with Neutral Current Measurement
ADE7953
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.
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.
REF
RESET
VDD
FUNCTIONAL BLOCK DIAGRAM
VINTA
VINTD
AIRMSOS
1.2V REF
LOW
NOISE
PRE-AMP
IAP
IAN
PGA
ADC
DIGITAL
INTEGRATOR
X
2
HPF
APHCAL
VP
VN
VGAIN
X
2
AIGAIN
AVAGAIN
LPF
AIRMS
ADE7953
LPF
VRMSOS
AWGAIN
AWATTOS
AVRMS
CF1DEN
PGA
ADC
HPF
ACTIVE, REACTIVE AND
APPARENT ENERGIES AND
VOLTAGE/CURRENT RMS
CALCULATION FOR PHASE B
(SEE PHASE A FOR DETAILED
DATA PATH).
LPF
PHASE
A AND B
DATA
DFC
:
CF2DEN
CF1
AVARGAIN
COMPUTATIONAL
BLOCK FOR TOTAL
REACTIVE POWER
AVAROS
IBP
PGA
IBN
ADC
DFC
:
CF2
CONFIGURATION
AND CONTROL
AGND
UART
DGND
SPI INTERFACE
I
2
C
REVP
ZX
ZX_I
PEAK
ANGLE
POWER FACTOR
SAG
REVP
ZX
ZX_I
CLKIN
CLKOUT
IRQ
CS
MISO/
SDA/Tx
MOSI/
SCL/Rx
SCLK
Figure 1.
Rev. C
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09320-001
ADE7953* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
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REFERENCE MATERIALS
Informational
•
Wireless Sensor Network (WSN) Demo System
EVALUATION KITS
•
ADE7953 Evaluation Board
DESIGN RESOURCES
•
ADE7953 Material Declaration
•
PCN-PDN Information
•
Quality And Reliability
•
Symbols and Footprints
DOCUMENTATION
Application Notes
•
AN-1118: Calibrating a Single-Phase Energy Meter Based
on the ADE7953
•
AN-1367: I2C Interface Between the ADE7953 and the
ADuCM360
•
AN-639: Frequently Asked Questions (FAQs) Analog
Devices Energy (ADE) Products
Data Sheet
•
ADE7953: Single Phase, Multifunction Metering IC with
Neutral Current Measurement Data Sheet
Product Highlight
•
ADE7953: Single-Phase Multifunction Energy Metering IC
with Neutral Current Measurement Overview
User Guides
•
UG-194: Evaluation Board for the ADE7953 Single Phase
Energy Metering IC
DISCUSSIONS
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TECHNICAL SUPPORT
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number.
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ADE7953
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
Data Sheet
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
Rev. C | Page 2 of 72
Data Sheet
Write Protection ..........................................................................57
Communication Verification.....................................................57
Checksum Register .....................................................................58
ADE7953 Registers .........................................................................60
ADE7953
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
Rev. C | Page 3 of 72
ADE7953
SPECIFICATIONS
Data Sheet
VDD = 3.3 V ± 10%, AGND = DGND = 0 V on-chip reference, CLKIN = 3.58 MHz, T
MIN
to T
MAX
= −40°C to +85°C, Register Address 0x120
,
set to 0x30, unless otherwise noted.
Table 1.
Parameter
PHASE ERROR BETWEEN CHANNELS
Power Factor = 0.8 Capacitive
Power Factor = 0.5 Inductive
ACTIVE ENERGY MEASUREMENT
Active Energy Measurement Error
(Current Channel A)
Active Energy Measurement Error
(Current Channel B)
AC Power Supply Rejection
Output Frequency Variation
DC Power Supply Rejection
Output Frequency Variation
Active Energy Measurement Bandwidth
REACTIVE ENERGY MEASUREMENT
Reactive Energy Measurement Error
(Current Channel A)
Reactive Energy Measurement Error
(Current Channel B)
AC Power Supply Rejection
Output Frequency Variation
DC Power Supply Rejection
Output Frequency Variation
Reactive Energy Measurement
Bandwidth
RMS MEASUREMENT
IRMS and VRMS Measurement
Bandwidth
IRMS (Current Channel A) Measurement
Error
IRMS (Current Channel B) and VRMS
Measurement Error
ANALOG INPUTS
Maximum Signal Levels
Min
Typ
Max
±0.05
±0.05
0.1
0.1
Unit
Degrees
Degrees
%
%
Test Conditions/Comments
Line frequency = 45 Hz to 65 Hz, HPF on
Phase lead 37°
Phase lag 60°
Over a dynamic range of 3000:1, PGA = 1,
PGA = 22, integrator off
Over a dynamic range of 1000:1, PGA = 1,
PGA = 16, integrator off
VDD = 3.3 V ± 120 mV rms, 100 Hz
VDD = 3.3 V ± 330 mV dc
0.01
1.23
0.1
0.1
%
kHz
%
%
−3 db
Over a dynamic range of 3000:1, PGA = 1,
PGA = 22, integrator off
Over a dynamic range of 1000:1, PGA = 1,
PGA = 16, integrator off
VDD = 3.3 V ± 120 mV rms, 100 Hz
VDD = 3.3 V ± 330 mV dc
0.01
1.23
%
kHz
−3 db
0.01
%
0.01
%
1.23
0.2
0.2
kHz
%
%
Over a dynamic range of 1000:1, PGA = 1,
PGA = 22, integrator off
Over a dynamic range of 500:1, PGA = 1,
PGA = 16, integrator off
Differential inputs: IAP to IAN, IBP to IBN
Single-ended input: VP to VN, IBP to IBN
Single-ended input: IAP to IAN
±500
±500
±250
50
50
540
mV peak
mV peak
mV peak
MΩ
MΩ
kΩ
Input Impedance (DC)
IAP Pin
IAN Pin
IBP, IBN, VP, VN Pins
ADC Offset Error
Current Channel B, Voltage Channel
Current Channel A
Gain Error
Current Channel A
Current Channel B
Voltage Channel
Uncalibrated error (see the Terminology
section)
0
±10
−12
−1
mV
mV
mV
%
%
%
Rev. C | Page 4 of 72
PGA = 1
PGA = 16, PGA = 22
External 1.2 V reference
±3
±3
±3
FPGA/CPLD
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