ADE7751ARS 内置故障检测单相电能计量IC

ADI公司电能计量（ADE）IC是业界经过最充分的验证和最受喜爱的电能计量技术。它具有同类产品中最优的性能、可靠性和EMC特性，而系统成本仍然极具吸引力。例如，我们最新的*ADE71xx和ADE75xx 系列产品是完整的SoC解决方案，它们针对高可靠、低成本、灵活方便、带LCD显示的单相电能表应用进行了优化。我们还提供了针对三相电能表以及数据通信的解决方案。

ADE7751ARS是一款适用于双线配电系统高精度、容错电能计量IC。它可提供基于输电线电压和电流计算的瞬时有功功率和平均有功功率。该器件规范超过IEC1036标准规定的精度要求。ADE7751ARS中使用的唯一模拟电路是ADC和参考电压电路。所有其它信号处理（例如乘法和滤波）都是在数字域实现的。这种信号处理方法可在随环境条件和时间变化的很大范围内提供优异的稳定性和精度。

ADE7751ARS包含一种新颖的故障检测测方案，它可在故障条件下发出警告并且允许ADE7751ARS在窃电期间继续精确计费。它通过不断监测相电流和零线电流（回路电流）检测故障条件。当这两个电流差值超过12.5%时，便指示发生故障，并且按照两个电流的较大者继续计费。两通道之间的增益校准在器件外部进行调整。ADE7751ARS采用SSOP封装，并且与AD7751引脚兼容。ADE7751ARS与AD7751功能相同。唯一的区别在于它的低频率（F1/F2）和高频率（CF）输出在各种负载条件下都是同步的。

The ADE7751ARS is a high-accuracy, fault-tolerant electrical energy measurement IC that is intended for use with 2-wire distribution systems. The part specifications surpass the accuracy requirements as quoted in the IEC1036 standard.

The only analog circuitry used in the ADE7751ARS is in the ADCs and reference circuit. All other signal processing (e.g., 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 ADE7751ARS incorporates a novel fault detection scheme that warns of fault conditions and allows the ADE7751ARS to continue accurate billing during a fault event.

The ADE7751ARS does this by continuously monitoring both the phase and neutral (return) currents. A fault is indicated when these currents differ by more than 12.5%. Billing is continued using the larger of the two currents.

The ADE7751ARS supplies average real power information on the low-frequency outputs F1 and F2. These logic outputs may be used to directly drive an electromechanical counter or interface to an MCU. The CF logic output gives instantaneous real power information. This output is intended to be used for calibration purposes.

The ADE7751ARS includes a power supply monitoring circuit on the AVDD supply pin. The ADE7751ARS will remain in a reset condition until the supply voltage on AVDD reaches 4 V. If the supply falls below 4 V, the ADE7751ARS will also be reset and no pulses will be issued on F1, F2, and CF.

Internal phase matching circuitry ensures that the voltage and current channels are matched whether the HPF in Channel 1 is on or off. The ADE7751ARS also has anticreep protection. The ADE7751ARS is available in 24-lead DIP and SSOP packages.

ADE7751ARS 技术指标

Meter Type	Single Phase Anti-Tamper
Active Energy Accuracy	0.1% over 500:1 @25°C
Active Energy Bandwidth	14kHz
Analog input range	+/-62.5mV to +/-1V peak
Power Consumption	15mW Typical
Reference Tempco	30ppm/°C Typical

ADE7751ARS 特点

超过IEC61036标准的精度要求：在25°C温度条件下，500:1动态范围内有功功率测量误差小于0.1%
不断监测相电流和零线电流
故障和逆功率输出指示潜在的接线错误
可直接驱动步进电机计度器的脉冲输出
用于快速校准附加的高频脉冲输出
内置参考电压源（2.4 V）
低功耗（典型值：15 mW）
High Accuracy, Surpasses 50 Hz/60 Hz IEC 687/1036
Less than 0.1% Error over a Dynamic Range of 500 to 1
Supplies Average Real Power on the Frequency
Outputs F1 and F2
High-Frequency Output CF Is Intended for Calibrationand Supplies Instantaneous Real Power
Continuous Monitoring of the Phase and Neutral
Current Allows Fault Detection in 2-Wire
Distribution Systems
ADE7751ARS Uses the Larger of the Two Currents (Phase
or Neutral) to Bill—Even During a Fault Condition
Two Logic Outputs (FAULT and REVP) Can Be Used to
Indicate a Potential Miswiring or Fault Condition
Direct Drive for Electromechanical Counters and
2-Phase Stepper Motors (F1 and F2)
A PGA in the Current Channel Allows the Use of Small
Values of Shunt and Burden Resistance
Proprietary ADCs and DSP Provide High Accuracy over
Large Variations in Environmental Conditions and Time
On-Chip Power Supply Monitoring
On-Chip Creep Protection (No Load Threshold)
On-Chip Reference 2.5 V 8% (30 ppm/C Typical) with External Overdrive Capability
Single 5 V Supply, Low Power (15 mW Typical)
Low-Cost CMOS Process

ADE7751ARS 主要用途：

电子式单相有功防窃电电能表
单相有功防窃电系列电能表。

ADE7751ARS 产品型号选择

型号 Model	封装 Package	管脚个数 Pins	温度级别 Temp Range	无铅封装产品
ADE7751ARS	24 ld SSOP	24	Ind	N Material Declaration
ADE7751ARSRL	24 ld SSOP	24	Ind	N Material Declaration
ADE7751ARSZ	24 ld SSOP	24	Ind	Y Material Declaration
ADE7751ARSZRL	24 ld SSOP	24	Ind	Y Material Declaration
EVAL-ADE7751ARSZEB	EVALUATION BOARDS	-	Comm	Y

ADE7751ARS 技术资料：

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