Analog Devices ADE7953 Datasheet
Data Sheet
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.
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 simultaneously 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.
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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-UpProcedure...............................................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 ChannelRMS Calculation......................................23 | |
| Voltage Channel RMSCalculation.......................................23 | |
| ActivePower Calculation.........................................................24 | |
| Sign of ActivePower Calculation.........................................25 | |
| Active Energy Calculation....................................................25 | |
| Active Energy Accumulation Modes....................................27 | |
| Reactive Power Calculation.....................................................28 | |
| Sign of ReactivePower 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 |
Table Caption: This table of contents outlines a document that appears to be a datasheet or technical manual for the ADE7953, a power monitoring IC, detailing its features, specifications, operational theory, and calibration procedures.
Offset Calibration
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