ADE7953:带零线电流测量的单相多功能计量IC

ADE7953: 带零线电流测量的单相多功能计量IC

ADE7953 功能框图 ADE7953是一款高精度电能计量IC，主要用于单相应用。它能够测量线路电压和电流，并计算有功、无功、视在功率以及瞬时均方根电压和电流。该器件内置三个Σ-Δ型ADC和一个高精度电能计量内核。第三输入通道可同时测量零线电流，支持窃电检测和零线电流计费。附加通道集成了完整的信号路径，允许执行各种测量。各输入通道均支持独立且灵活的增益级，因此该器件适合与各种电流传感器一起使用，如电流变压器(CT)和低阻值分流电阻等。两个片内积分器为使用罗氏线圈传感器提供了便利。ADE7953可以通过多种通信接口访问片内计量寄存器，包括SPI、I²C和UART。两个可配置的低抖动脉冲输出引脚提供与有功、无功或视在功率及电流和电压均方根值成比例的输出。通过外部IRQ引脚可以获得全面的电能质量信息，如过流、过压、峰值和骤降检测等。该器件包括独立的有功、无功和视在空载检测功能，用以防止电表“爬电”。此外还提供了专用反向电源(REVP)、过零电压(ZX)和过零电流(ZX-I)引脚。ADE7953电能计量IC采用3.3V电源供电，提供28引脚LFCSP封装。

The ADE7953 is a high accuracy, 3-phase electrical energy measurement IC with serial interfaces and three flexible pulse outputs. The ADE7953 incorporates second-order Σ-Δ ADCs, a digital integrator, reference circuitry, and all the signal processing required to perform total (fundamental and harmonic) active, reactive and apparent energy measurement, fundamental active and reactive energy measurement and rms calculations. A fixed function digital signal processor (DSP) executes this signal processing.The ADE7953 is suitable to measure active, reactive, and apparent energy in various 3-phase configurations, such as WYE or DELTA services, with both three and four wires. The ADE7953 provides system calibration features for each phase, that is, rms offset correction, phase calibration, and gain calibration. The CF1, CF2 and CF3 logic outputs provide a wide choice of power information: total/fundamental active/reactive power, total apparent power, or sum of current rms values.The ADE7953 has waveform sample registers that allow access to all ADC outputs. The device also incorporates power quality measurements such as short duration low or high voltage detections, short duration high current variations, line voltage period measurement and angles between phase voltages and currents. Two serial interfaces can used to communicate with the ADE7953 : SPI or I²C while a dedicated high speed interface, HSDC (High Speed Data Capture) port, can be used in conjunction with I²C to provide access to the ADC outputs and real time power information. The ADE7953 has also two interrupt request pins, IRQ0 and IRQ1, to indicate that an enabled interrupt event has occurred.Three specially designed low power modes ensure the continuity of the energy accumulation when the ADE7953 is in tampering situation.The ADE7953 is available in 40-lead LFCSP lead free package.

ADE7953 特点

测量有功、无功和视在功率、采样波形及电流和电压均方根值
提供第二电流输入以进行零线电流测量
在3000:1的动态范围内，有功和无功功率测量误差小于0.1%
在500:1的动态范围内，瞬时电流和电压均方根值测量误差小于0.2%
提供视在功率测量和瞬时功率读数
带宽：1.5kHz
灵活的PGA增益级（最高22倍）
内置用于罗氏线圈的积分器
SPI, I²C 或UART通信

ADE7953 技术指标

Anti-Tamper Support: Missing Neutral
Output Interface: I²C,Pulsed,SPI,UART
Package: 28-Lead LFCSP
Measurement Parameters : Irms,VA,VAR,Vrms,Watt
Current Sensor Interface: Current Transformer,Rogowski Coil,Shunt

ADE7953 建议配套产

推荐ADE7953使用的外部基准电压源
- 针对低漂移、低噪声、低功耗、低成本设计，推荐使用ADR280。
- 针对高精度、低压差、10mA 输出设计，推荐使用ADR3412。
推荐ADE7953使用的RS-485/RS-422数据收发器
- 针对采用8引脚SOIC 封装的低功耗、半双工收发器，推荐使用ADM487E。
- 针对集成变压器驱动器的隔离式全/半双工收发器，推荐使用ADM2487E。
推荐ADE7953使用的数字隔离器
- 针对双路、双向2.5kV热插拔型隔离器，推荐使用ADuM1250。
- 针对双路、双向5kV热插拔型隔离器，推荐使用ADuM2250。
推荐电源解决方案
- 欲选择电压调节器产品，请使用ADIsimPower.
- 欲选择电源监控器产品，请使用电源监控器参数搜索。

ADE7953 芯片订购指南

产品型号	封装	引脚	温度范围	包装和数量	报价*(100-499)	报价*1000 pcs
ADE7953ACPZ 产品状态: 量产	28 ld LFCSP (5x5mm w/3.40mm EP)	28	工业	Tray, 490	$ 2.38	$ 2.29
ADE7953ACPZ-RL 产品状态: 量产	28 ld LFCSP (5x5mm w/3.40mm EP)	28	工业	Reel, 5000	-	$ 2.29