《電子技術(shù)應(yīng)用》
您所在的位置:首頁 > 模擬設(shè)計(jì) > 解決方案 > ADIADE7816精密多路電表解決方案

ADIADE7816精密多路電表解決方案

2012-04-13
作者:ADI公司

ADI公司的ADE7816是精密的多路(六個(gè)電流通路,一個(gè)電壓通路)電表集成電路,可以測(cè)量線路電壓和電流,計(jì)算有功和無功能量以及瞬態(tài)rms電壓和電流.器件集成了7個(gè)sigma-delta (Σ-Δ) ADC和高精度能量測(cè)量?jī)?nèi)核,動(dòng)態(tài)范圍1000:1時(shí)的精度誤差小于0.1%,支持電流變壓器和Rogowski線圈傳感器,工作帶寬2kHz,所有六個(gè)通路都能測(cè)量角度.工作電壓3.3V.本文介紹了ADE7816主要特性,功能方框圖, 測(cè)試電路圖, 信號(hào)流程框圖, 有功和無功功率信號(hào)流程框圖,以及ADE7816評(píng)估板主要特性和電路圖.

The ADE7816 is a highly accurate, multichannel metering device that is capable of measuring one voltage channel and up to six current channels. It measures line voltage and current and calculates active and reactive energy, as well as instantaneous rms
voltage and current. The device incorporates seven sigma-delta (Σ-Δ) ADCs with a high accuracy energy measurement core. The six current input channels allow multiple loads to be measured simultaneously. The voltage channel and the six current channels each have a complete signal path allowing for a full range of measurements. Each input channel supports a flexible gain stage and is suitable for use with current transformers (CTs). Six on-chip digital integrators facilitate the use of the Rogowski coil sensors.

The ADE7816 provides access to on-chip meter registers via either the SPI or I2C interface. A dedicated high speed interface, the high speed data capture (HSDC) port, can be used in conjunction with I2C to provide access to real-time ADC output information. A full range of power quality information, such as overcurrent, overvoltage, peak, and sag detection, is accessible via the two external interrupt pins, and IRQ0 IRQ1.

The ADE7816 energy metering IC operates from a 3.3 V supply voltage and is available in a 40-lead LFCSP that is Pb free and RoHS compliant.

ADE7816主要特性:

Measures active and reactive energy, sampled waveforms, and current and voltage rms

6 current input channels and 1 voltage channel

<0.1% error in active and reactive energy over a dynamic range of 1000:1

Supports current transformer and Rogowski coil sensors

Provides instantaneous current and voltage readings

Angle measurements on all 6 channels

2 kHz bandwidth operation

Reference: 1.2 V (drift 10 ppm/°C typical) with external overdrive capability

Flexible I2C, SPI, and HSDC serial interfaces

圖1. ADE7816功能方框圖

圖2. ADE7816測(cè)試電路圖

圖3. ADE7816信號(hào)流程框圖

圖4. ADE7816有功功率信號(hào)流程框圖

圖5. ADE7816無功功率信號(hào)流程框圖

ADE7816評(píng)估板

The ADE7816 evaluation kit includes an evaluation board that allows the performance of the ADE7816 6-channel energy measurement IC to be evaluated. The ADE7816 evaluation kit includes evaluation software, written in LabVIEW®, that provides access to the registers of the ADE7816 using a PC interface. This document provides information to assist the user in evaluating the ADE7816.

Complete specifications for the ADE7816 are available in the ADE7816 data sheet available from Analog Devices, Inc., and should be consulted in conjunction with this user guide when using the evaluation board.

ADE7816評(píng)估板主要特性:

Evaluation board to implement a fully functional 6-channel energy meter

Accompanying PC-based LabVIEW software

Easy connection of external transducers via screw terminals

Optically isolated metering components

USB-based PC connection

External voltage reference option available for on-chip reference evaluation

圖6.ADE7816評(píng)估板外形圖

圖7.ADE7816評(píng)估板電路圖(1)

圖8.ADE7816評(píng)估板電路圖(2)

圖9.ADE7816評(píng)估板電路圖(3)
詳情請(qǐng)見:
http://www.analog.com/static/imported-files/data_sheets/ADE7816.pdf

http://www.analog.com/static/imported-files/user_guides/UG-370.pdf



本站內(nèi)容除特別聲明的原創(chuàng)文章之外,轉(zhuǎn)載內(nèi)容只為傳遞更多信息,并不代表本網(wǎng)站贊同其觀點(diǎn)。轉(zhuǎn)載的所有的文章、圖片、音/視頻文件等資料的版權(quán)歸版權(quán)所有權(quán)人所有。本站采用的非本站原創(chuàng)文章及圖片等內(nèi)容無法一一聯(lián)系確認(rèn)版權(quán)者。如涉及作品內(nèi)容、版權(quán)和其它問題,請(qǐng)及時(shí)通過電子郵件或電話通知我們,以便迅速采取適當(dāng)措施,避免給雙方造成不必要的經(jīng)濟(jì)損失。聯(lián)系電話:010-82306118;郵箱:aet@chinaaet.com。