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ADE7761B: 电能计量IC，内置故障和零线断线检测

ADE7761B是一款精确的容错电能计量IC，设计用于双线式分配系统。该产品的技术规格超越了IEC 62053-21标准所列的精度要求。ADE7761B上唯一采用的模拟电路是ADC和基准电压源电路。所有其他信号处理（例如，乘法和滤波）都在数字域中实现。这种方式能够始终在极端环境条件下提供出色的稳定性和精度。与ADE7751相似，ADE7761B通过持续监控相位和零线电流，实现故障检测方案。电流差值超过6.25%时，表明有故障发生。ADE7761B通过持续监控输入电压，实现零线断线检测方案。检测到零线断线情况后（无电压输入），ADE7761B继续根据有功电流信号进行计费（参见“零线断线模式”部分）。如果FAULT引脚变为高电平，则表明有零线断线情况发生。ADE7761B在低频输出F1和F2上提供平均有功功率信息。CF逻辑输出提供瞬时有功功率信息。ADE7761B在VDD电源引脚上有一个电源监控电路。内部相位匹配电路确保电压和电流通道相匹配。内部空载阈值确保空载时ADE7761B不会出现爬电现象。

The ADE7761B is a high accuracy, fault-tolerant, electrical energy measurement IC intended for use with 2-wire distribution systems. The part specifications surpass the accuracy requirements as quoted in the IEC 62053-21 standard. The only analog circuitry used on the ADE7761B is in the ADCs and reference circuit. All other signal processing (such as multiplication and filtering) is carried out in the digital domain. This approach provides superior stability and accuracy over extremes in environmental conditions and over time. The ADE7761B incorporates a fault detection scheme similar to the ADE7751 by continuously monitoring both phase and neutral currents. A fault is indicated when the currents differ by more than 6.25%.The ADE7761B incorporates a missing neutral detection scheme by continuously monitoring the input voltage. When a missing neutral condition is detected (no voltage input), the ADE7761B continues billing based on the active current signal (see the Missing Neutral Mode section). The missing neutral condition is indicated when the FAULT pin goes high. The ADE7761B supplies average active power information on the low frequency outputs, F1 and F2. The CF logic output gives instantaneous active power information.The ADE7761B includes a power supply monitoring circuit on the VDD supply pin. Internal phase matching circuitry ensures that the voltage and current channels are matched. An internal no-load threshold ensures that the ADE7761B does not exhibit any creep when there is no load.

ADE7761B 特点 高精度、有功电能计量IC支持IEC 62053-21标准 在1000:1的动态范围内误差小于0.1% 对频率输出F1和F2提供有功功率 高频输出CF设计用于校准和提供瞬时有功功率 相位和零线电流持续监控允许在双线分配系统中实现故障检测 电流通道输入电平非常适合用于分流和电流变压器传感器 取两个电流（相位或零线）中较大者进行计费，包括在故障情况发生期间 电压和电流输入的持续监控可实现零线断线检测 检测到零线断线时，使用一个电流输入（相位或零线）进行计费 两个逻辑输出（FAULT和REVP）可用于指示潜在的接线错误、故障或零线断线情况 直接驱动机电计数器和二相步进电机（F1和F2） 专有ADC和DSP可在变化较大的环境条件下长期保持高精度特性

ADE7761B 技术指标 Anti-Tamper Support: Current Fault,Missing Neutral Output Interface: Pulsed Package: 20-Lead SSOP Measurement Parameters : Watt Current Sensor Interface: Current Transformer,Shunt

ADE7761B 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
ADE7761BARSZ 产品状态: 量产	20 ld SSOP	20	工业	Tube, 66	$ 1.43	$ 1.38
ADE7761BARSZ-RL 产品状态: 量产	20 ld SSOP	20	工业	Reel, 1500	-	$ 1.38

ADE7761B 应用技术支持与电子电路设计开发资源下载

1. ADE7761B 数据手册DataSheet 下载 . pdf
2. Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
3. ADC模数转换器选型指南 . pdf
4. 电能计量IC选型指南 . pdf