Analog Devices Inc. ADE78x 多相多功能电能计量集成电路
亚德诺半导体 ADE78x 多相多功能电能计量集成电路是高精确度、3 相电能计量集成电路，带串行接口和三个灵活的脉冲输出。ADE78x 集成电路内置二阶 Σ-Δ 模数转换器、一个数字积分器、参考电路、以及执行总（基础和谐波）有功、无功（ADE7858A、ADE7868A 和 ADE7878A）和视在电能测量和均方根计算所需的所有信号处理功能，它们采用了三线和四线的各种 3 相结构，如星形或三角形接法。该器件包含波形采样寄存器，以实现对全部模数转换器输出的访问。ADE78x 还具有电能质量测量功能、如短时低压或高压检测、短时大电流变化、线电压持续时间测量、以及相电压和电流间角度。 ADE78x 具有两个中断请求引脚 IRQ0 和 IRQ1，用以指示已启用中断事件的发生。对于 ADE7868A/ ADE7878A，三个专门设计的低功耗模式在 ADE7868A/ ADE7878A 遇到篡改的情况下仍可确保连续的电能累计。
The devices include waveform sampling registers to allow access to all ADC outputs. ADE78x also incorporate power quality measurements, such as short duration low or high voltage detection, short duration high current variation, line voltage period measurement, and angles between phase voltages and currents. ADE78x has two interrupt request pins, IRQ0 and IRQ1, to indicate that an enabled interrupt event has occurred. For the ADE7868A/ ADE7878A, three specially designed low power modes ensure the continuity of energy accumulation when the ADE7868A/ ADE7878A are in a tampering situation.
特性
- Highly accurate; supports EN 50470-1, EN 50470-3, IEC 62053-21, IEC 62053-22, and IEC 62053-23 standards
- Compatible with 3-phase, 3- or 4-wire (delta or wye) meters and other 3-phase services
- Supplies total (fundamental and harmonic) active, reactive, and apparent energy and fundamental active/reactive energy on each phase and on the overall system
- 0.1% error (typical) in active and reactive energy over a dynamic range of 1000 to 1 at TA = 25°C
- 0.2% error (typical) in active and reactive energy over a dynamic range of 3000 to 1 at TA = 25°C
- Averaged rms measurements available in low ripple rms registers
- Supports current transformer and di/dt current sensors
- Dedicated ADC channel for neutral current input
- Estimated neutral current measurement by calculating the rms of the sum of the phase currents in all 3 phases
发布日期: 2014-10-03
| 更新日期: 2025-03-04