Datasheet ADE7816 (Analog Devices)

Six Current Channels, One Voltage Channel, Energy Metering IC Data Sheet ADE7816 FEATURES
voltage and current. The device incorporates seven sigma-delta
Measures active and reactive energy, sampled waveforms,
(Σ-Δ) ADCs with a high accuracy energy measurement core.
and current and voltage rms
The six current input channels al ow multiple loads to be measured
6 current input channels and 1 voltage channel
simultaneously. The voltage channel and the six current channels
<0.1% error in active and reactive energy over a dynamic
each have a complete signal path allowing for a full range of
range of 1000:1
measurements. Each input channel supports a flexible gain stage
Supports current transformer and Rogowski coil sensors
and is suitable for use with current transformers (CTs). Six on-
Provides instantaneous current and voltage readings
chip digital integrators facilitate the use of the Rogowski coil
Angle measurements on all 6 channels
sensors.
2 kHz bandwidth operation
The ADE7816 provides access to on-chip meter registers via either
Reference: 1.2 V (drift 10 ppm/°C typical) with external
the SPI or I2C interface. A dedicated high speed interface, the
overdrive capability
high speed data capture (HSDC) port, can be used in conjunction
Flexible I2C, SPI, and HSDC serial interfaces
with I2C to provide access to real-time ADC output information.
GENERAL DESCRIPTION
A ful range of power quality information, such as overcurrent, overvoltage, peak, and sag detection, is accessible via the two The ADE7816 is a highly accurate, multichannel metering external interrupt pins, IRQ0 and IRQ1. device that is capable of measuring one voltage channel and up to six current channels. It measures line voltage and current and The ADE7816 energy metering IC operates from a 3.3 V supply calculates active and reactive energy, as well as instantaneous rms voltage and is available in a 40-lead LFCSP that is Pb free and RoHS compliant.
FUNCTIONAL BLOCK DIAGRAM REF RESET IN/OUT DGND 4 17 6 CLKIN 27 VRMSOS 2 PULL_HIGH 1.2V CLKOUT REF 28 ADE7816 VGAIN 3 PULL_LOW X2 VRMS LPF VP 15 PGA2 ADC HPF VN 16 AWATTOS AWGAIN IAGAIN DIGITAL 29 IRQ0 PCF_A_COEFF INTEGRATOR LPF SPI/I2C 32 IAP IRQ1 7 ENERGY PGA1 ADC AVAROS AVARGAIN AND RMS HPF IAN 8 DATA 36 SCLK/SCL COMPUTATIONAL ALL BLOCK FOR CHANNELS 38 MOSI/SDA IBP 9 TOTAL REACTIVE POWER PGA1 ADC ENERGY AND RMS CALCULATIONS SEE I2C IBN 12 CHANNEL A FOR DETAILED SIGNAL PATH 37 MISO/HSD IARMSOS ICP 13 39 SS/HSA HSDC PGA1 ADC ENERGY AND RMS CALCULATIONS SEE ICN 14 CHANNEL A FOR DETAILED SIGNAL PATH 35 HSCLK X2 IARMS LPF IDP 23 PGA3 ADC ENERGY AND RMS CALCULATIONS SEE CHANNEL A FOR DETAILED SIGNAL PATH 1 NC IEP 22 10 NC PGA3 ADC ENERGY AND RMS CALCULATIONS SEE 11 NC CHANNEL A FOR DETAILED SIGNAL PATH 20 NC IFP 19 POR LDO LDO PGA3 ADC ENERGY AND RMS CALCULATIONS SEE 21 NC IN 18 CHANNEL A FOR DETAILED SIGNAL PATH 30 NC 26 25 24 5 40 34 33 31
001
VDD AGND AVDD DVDD NC NC NC NC
10390- Figure 1.
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Document Outline Features General Description Functional Block Diagram Revision History Specifications Timing Characteristics I2C-Compatible Interface Timing SPI Interface Timing HSDC Interface Timing Load Circuit for All Timing Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Test Circuit Terminology Quick Start Inputs Power and Ground VDD and AGND, DGND Reference Circuit REFIN/OUT Reset Hardware Reset Software Reset Functionality CLKIN and CLKOUT Analog Inputs Input Pins PGA Gain Digital Integrator Antialiasing Filters Energy Measurements Starting and Stopping the DSP Active Energy Measurement Definition of Active Power and Active Energy Active Energy Registers Active Energy Threshold Energy Accumulation and Register Roll-Over Reactive Energy Measurement Definition of Reactive Power and Reactive Energy Reactive Energy Registers Reactive Energy Threshold Reactive Energy Accumulation and Register Roll-Over Line Cycle Accumulation Mode Root Mean Square Measurement No Load Detection Setting the No Load Thresholds No Load Interrupt Energy Calibration Channel Matching Energy Gain Calibration Energy Offset Calibration Energy Phase Calibration RMS Offset Calibration Power Quality Features Selecting a Current Channel Group Instantaneous Waveforms Zero-Crossing Detection Zero-Crossing Detection Zero-Crossing Timeout Peak Detection Setting the PEAKCYC Register Overcurrent and Overvoltage Detection Setting the OVLVL and OILVL Registers Overvoltage and Overcurrent Interrupts Indication of Power Direction Angle Measurements Period Measurement Voltage Sag Detection Setting the SAGCYC Register Setting the SAGLVL Register Voltage Sag Interrupt Checksum Layout Guidelines Crystal Circuit Outputs Interrupts Communication Serial Interface Selection I2C-Compatible Interface I2C Write Operation I2C Read Operation SPI-Compatible Interface SPI Read Operation SPI Write Operation HSDC Interface Registers Register Protection Register Format Register Maps Register Descriptions Interrupt Enable and Interrupt Status Registers Outline Dimensions Ordering Guide