ADI ADE7953单相多功能电表解决方案关键字：消费类电子,智能电表,ADI公司的ADE7953是带零线电流测量的单相多功能电表集成电路，高精 度地测量火线电压和电流,并计算出有功,无功和表观功率以及即时的 RMS电压和电流器件包括三个Delta-Sigma ADC和高精度电能测量核， 动态范围 3000:1, 有功和无功功率的测量误差小于 0.1%.本文介绍了 ADE7953 主要特性,方框图,多各种信号链和处理框图, 单相电表评估板 和接口板电路图以及评估板软件.ADI公司的ADE7953是带零线电流测量的单相多功能电表集成电路，高精 度地测量火线电压和电流,并计算出有功,无功和表观功率以及即时的 RMS电压和电流器件包括三个Delta-Sigma ADC和高精度电能测量核， 动态范围 3000:1, 有功和无功功率的测量误差小于 0.1%.本文介绍了 ADE7953 主要特性,方框图,多各种信号链和处理框图, 单相电表评估板 和接口板电路图以及评估板软件.ADE7953:Single Phase Multifunction Metering IC with Neutral Current MeasurementThe 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 工- ADCs with a high accuracy en ergy measureme nt core. The sec ond 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, I2C, 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 ICoperates from a 3.3 V supply voltage and is available in a 28-lead LFCSP package.ADE7953 主要特性:Measures active, reactive, and apparent energy; sampled waveform; current and voltage rmsProvides a second current input for neutral current measurementLess than 0.1% error in active and reactive energy measurements over a dynamic range of 3000:1Less than 0.2% error in instantaneous IRMS measurement over a dynamic range of 1000:1Provides apparent energy measurement and instantaneous power readings 1.23 kHz bandwidth operationFlexible PGA gain stage (up to x22)Includes internal integrators for use with Rogowski coil sensors SPI, I2C, or UART communicationAGNDiDGMD图 1.ADE7953 方框图nr 1D*F1INCPMNmPREN SU-*-图 3.ADE7953 电流通路 ADC 和信号通路图WETAGE PEAK. OERVOLTQS.MGE3ETE-C71CXKIRMSOS21(J XLPFM-iE 跟口图 4.ADE7953 电压通路 ADC 和信号通路图CURRENT SIGNAL FROM HPF OR tMTEGRArOR (IF ENABLED图 5.ADE7953 电流通路 RMS 信号处理框图图 6.ADE7953 电压通路 RMS 信号处理框图KMIALWTEGFMDHCURRENTCHANNELAQR&iKTEKmAj.VCLTADE CHANNELuHFFAClTiE i*CWERaGHALFIXED IKTEHNALTldflESHOLD丸ENER旳 严广严诫Lr i i i i捕 ir&-KawVOLTAGE XCHANNEL SIGNALREACTfVE POWER ALGORITHMFIXED INTERNAL THRESHOLD图 8.ADE7953 无功功率信号链acoSmSjwiow fII 代 I IAPENERGYk2510图 7.ADE7953 有用功率信号链CURRENT CHANNEL AOR B图 9.ADE7953 表观功率累加信号链ADE7953 单相电表评估板The ADE7953 evaluation kit includes two boards that together allow the performance of the ADE7953 single phase energy meter-ing IC to be evaluated. The ADE7953 evaluation kit includes evaluation software, written in LabVIEW, that provides access to the registers of the ADE7953 using a PC interface.This document provides information about using the evaluation kit to evaluate the ADE7953 silicon.图 10.ADE7953 单相电表评估板外形图图 11.ADE7953 接口板外形图图 12.ADE7953 单相电表评估板电路图 (1)图 13.ADE7953 单相电表评估板电路图 (2)i,hs=1i-h?:-J 叮n J目 ri-t.JI1crRCTTTinliirnn-i uil图 14.ADE7953 接口板电路图 (1).一 m 莒 L出FHHrM 思 mgsIXJ NOT INSTALLAT.TGN PQ3T$ JV$ nRJN KF.JCT TC MCU ST DE WTTH PTMSSt - SO图 15.ADE7953 接口板电路图 (2)评估板软件见:http:/www.analog.com/static/imported-files/eval_boards/ADE7953_eva lboard_software.zip详情请见:htt