ADE7758ARWZ 三项多功能电能计量IC
ADE7758是一款高准确度的三相电能计量芯片,带有两路脉冲输出功能和一个串行接口。ADE7758 集 成了二阶Σ-D 模数转换器, 数字积分器,基准电路,温度传感器,以及所有进行有功,无功和视在电能计量以及有效值 计量所需的信号处理元件。
ADE7758 适用于计量各种三相配置条件下的有功,无功和视在电能,如WYE和DELTA系统,包括三线和 四线制。ADE7758为各相提供系统校准功能,包括有效值偏移校准、相位校准、功率校准。APCF 逻辑输出 提供有功功率信息,VARCF逻辑输出提供瞬时无功率或视在功率信息。
ADE7758 中具有波形采样寄存器,它可以对模数转换器的输出进行访问。该器件集成了一个用于短时 低电平和高电平变化的检测电路,变化的阈值电压和持续时间（即半周期数）由用户编程决定。三相中的 任一相的线电压过零检测与电压过零点是同步的,过零检测的结果可用于测量三个电压输入中任意一个的 周期。也可用于内部芯片的线循环（LINE CYCLE）电能累加模式。该模式使电能累加与半周期的整数倍同 步,以此实现更快更准确的校准。
数据通过ADE7758 的SPI 串行接口读取。中断请求输出（IRQ）为开漏极,低电平有效。在ADE7758 中 出现一个或多个中断事件时,IRQ输出变为低电平。通过状态寄存器显示中断事件的性质。ADE7758采用24 引脚小外形封装（SOIC）。
The ADE77581 is a high accuracy, 3-phase electrical energy measurement IC with a serial interface and two pulse outputs. The ADE7758 incorporates second-order Σ-Δ ADCs, a digital integrator, reference circuitry, a temperature sensor, and all the signal processing required to perform active, reactive, and apparent energy measurement and rms calculations.
The ADE7758 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 ADE7758 provides system calibration features for each phase, that is, rms offset correction, phase calibration, and power calibration. The APCF logic output gives active power information, and the VARCF logic output provides instantaneous reactive or apparent power information
ADE7758ARWZ 技术指标
| Meter Type | Polyphase Multifunction |
| Active Energy Accuracy | 0.1% over 1000:1 @25°C |
| Active Energy Bandwidth | 14kHz |
| VAR Energy Accuracy | 0.1% over 1000:1 @ 25°C |
| IRMS Accuracy | 0.5% over 500: 1 |
| VRMS Accuracy | 0.5% over 20:1 |
| Analog input range | +/-32mV to +/- 500mV peak |
| Power Consumption | 70mW Typical |
| Reference Tempco | 30ppm/°C Typical |
ADE7758ARWZ 特点
- 高准确度：支持IEC60687,IEC61036,, IEC 61268, IEC 62053-21,IEC 62053- 22, 和IEC 62053-23 标准。
- 适用于三相/三线,三相/四线和其它三相系统。
- 温度在25 度时,在1000:1 的动态范围内,有功电能误差小于0.1%。
- 提供有功电量/无功电量/视在电量,电压有效值,电流有效值和采样波形数据。
- 两路脉冲输出,一为有功功率,二为无功率或视在功率,带频率编程功能。
- 数字功率,相位和有效值偏移校正。
- 提供线电压骤降（SAG）和电压检测的片内用户可编程阈值电压。
- 片内数字积分器可以直接连接 di/dt 电流传感器。
- 电流通道上的可编程增益放大器（PGA）允许直接连接电流分流器和电流互感器。
- 带中断请求输出功能的SPI®兼容串行接口。
- 专利模数转换器（ADC）和数字信号处理器（DSP）技术保证在各种环境和时间条件 下的高准确度。
- 2.4 伏基准电压（温度系数典型值30ppm /°C ）,带外部过载功能.
- Highly accurate; supports IEC 60687, IEC 61036, IEC 61268, IEC 62053-21, IEC 62053-22, and IEC 62053-23
- Compatible with 3-phase/3-wire, 3-phase/4-wire, and other 3-phase services
- Less than 0.1% active energy error over a dynamic range of 1000 to 1 at 25°C
- Supplies active/reactive/apparent energy, voltage rms, current rms, and sampled waveform data
- Two pulse outputs, one for active power and the other selectable between reactive and apparent power with programmable frequency
- Digital power, phase, and rms offset calibration
- On-chip, user-programmable thresholds for line voltage SAG and overvoltage detections
- An on-chip, digital integrator enables direct interface-to-current sensors with di/dt output
- A PGA in the current channel allows direct interface to shunts and current transformers
- An SPI®-compatible serial interface with IRQ
- Proprietary ADCs and DSP provide high accuracy over large variations in environmental conditions and time
- Reference 2.4 V (drift 30 ppm/°C typical) with external overdrive capability
- Single 5 V supply, low power (70 mW typical)
ADE7758 产品型号选择
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| ADE7758ARW | 量产 | 24 ld SOIC - Wide | 24 | 工业 |
| ADE7758ARWRL | 量产 | 24 ld SOIC - Wide | 24 | 工业 |
| ADE7758ARWZ | 量产 | 24 ld SOIC - Wide | 24 | 工业 |
| ADE7758ARWZRL | 量产 | 24 ld SOIC - Wide | 24 | 工业 |
| EVAL-ADE7758ZEB | 量产 | 评估板 | - | 工业 |
