ADE7755ARS 脉冲输出低功耗三相电能计量IC
ADE7755是一款适用于单相配电系统的高精度电能计量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IEC61036标准规定的精度要求。ADE7755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。
电流通道提供高增益模式,可直接连接低阻值分流电阻器而不损失动态范围。两通道之间的增益校准在器件外部进行调整。ADE7755采用SSOP封装。在各种负载条件下提供低频（F1/F2）和高频（CF）同步输出。
ADE7755是一种高准确度电能测量集成电路,其技术指标超过IEC1036 规定的准确度要求。ADE7755只在 ADC 和基准源中使用模拟电路,所有其它信号处（如相乘和滤波）都使用数字电路, 这使ADE7755 在恶劣的环境条件下仍能保持极高的准确度和长期稳定性。ADE7755 引脚 F1 和 F2 以较低频率形式输出有功功率平均值,能直接驱动机电式计度器或与微控制器（MCU）接口。引脚CF 以较高频率形式输出有功功率瞬时值,用于校验或与MCU 接口。ADE7755内部包含一个对 AVDD 电源引脚的监控电路。在 AVDD 上升到 4V 之前,ADE7755一直保持在复位状态。当AVDD 降到 4V 以下,ADE7755也被复位,此时 F1,F2 和 CF 都没有输出。内部相位匹配电路使电压和电流通道的相位始终是匹配的,无论通道1 内的高通滤波器（HPL）是接通的还是断开的。内部的空载阈值特性保证 ADE7755在空载时没有潜动。 ADE7755有 24 脚 DIP 和 SSOP 两种封装。
The ADE7755 is pin compatible with the AD7755. The only difference between the ADE7755 and the AD7755 is that the ADE7755 features a synchronous CF and F1/F2 outputs under all load conditions.
The ADE7755 is a high accuracy electrical energy measurement IC. The part specifications surpass the accuracy requirements as quoted in the IEC1036 standard. See Analog Devices’ Application Note AN-559 for a description of an IEC1036 watt-hour meter reference design based on the AD7755. The only analog circuitry used in the ADE7755 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 ADE7755 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 or for interfacing to an MCU。
The ADE7755 includes a power supply monitoring circuit on the AVDD supply pin. The ADE7755 will remain in a reset condition until the supply voltage on AVDD reaches 4 V. If the supply falls below 4 V, the ADE7755 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 phase matched whether the HPF in Channel 1 is on or off. An internal no-load threshold ensures that the ADE7755 does not exhibit any creep when there is no load. The ADE7755 is available in a 24-lead SSOP package. 
ADE7755ARS 技术指标
| Meter Type | Single Phase |
| 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 |
ADE7755ARS 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%
- 直接连接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
- 高准确度,支持50Hz/60Hz IEC 687/1036 标准的准确度要求,在500:1 的动态范围内误差小于0.1%;
- 有功功率平均值从 ADE7755引脚 F1 和 F2 以频率方式输出
- 有功功率瞬时值从引脚CF 以较高频率方式输出,能用于仪表校验;逻辑输出引脚REVP 能指示负功率或错线;FI 和F2能直接驱动机电式计度器和两相步进电机;电流通道中的可编程增益放大器（PGA）使仪表能使用小阻值的分流电阻
- 在环境和时间有很大变化的条件下,采用专利模数转换器（ADC）和数字信号处（DSP）仍保证高准确度;
- 片内设有电源监控电路
- 片内带有防潜动功能（空载阈值）
- 片内基准电压2.5V±8%（温度系数典型值30ppm/℃）,能为外部电路提供基准
- +5V 单电源、低功耗（典型值15mW）
- 低成本CMOS 工艺。
- High Accuracy, Surpasses 50 Hz/60 Hz IEC 687/1036 Less than 0.1% Error over a Dynamic Range of
500 to 1 - The ADE7755 Supplies Average Real Power on the Frequency Outputs F1 and F2
- The High-Frequency Output CF Is Intended for Calibration and Supplies Instantaneous Real Power Pin Compatible with AD7755 with Synchronous CF and F1/F2 Outputs
- The Logic Output REVP Can Be Used to Indicate a Potential Miswiring or Negative Power
- Direct Drive for Electromechanical Counters and Two 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
ADE7755 产品型号选择
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| ADE7755ARS | 量产 | 24 ld SSOP | 24 | 工业 |
| ADE7755ARSRL | 量产 | 24 ld SSOP | 24 | 工业 |
| ADE7755ARSZ | 量产 | 24 ld SSOP | 24 | 工业 |
| ADE7755ARSZRL | 量产 | 24 ld SSOP | 24 | 工业 |
| EVAL-ADE7755ZEB | 量产 | 评估板 | - | 工业 |
ADE7755ARS 应用技术支持与电子电路设计开发资源下载
- ADE7755 数据手册DataSheet 下载 . pdf
- Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
- ADC模数转换器选型指南 . pdf
- 电能计量IC选型指南 . pdf
