ATT7122A 是一颗兼容ATT7022B/ATT7022C/ATT7022D 的高精度三相电能专用计量芯片，适用于三相三线和三相四线应用。ATT7122A 集成了7 路二阶sigma-delta ADC、参考电压电路以及所有功率、能量、有效值、功率因数及频率测量的数字信号处理等电路，能够测量各相以及合相的有功功率、无功

功率、视在功率、有功能量及无功能量，同时还能测量各相电流、电压有效值、功率因数、

相角、频率等参数，充分满足三相复费率多功能电能表的需求。详细数据定义请参阅参数寄

存器部分。-ATT7122A is compatible ATT7022B/ATT7022C/ATT7022D a high-precision three-phase power metering chip, for three-phase three-wire and three-phase four-wire applications. ATT7122A integrate seven second-order sigma-delta ADC, voltage reference circuit and all the power, energy, RMS, power factor and frequency measurements of the digital signal processing circuit capable of measuring the phase and phase combined active power, reactive power , apparent power, active energy and reactive energy, while measuring the phase current, RMS voltage, power factor, phase angle, frequency and other parameters to fully meet the three-phase multi-rate multi-function meter needs. See more data definition part of the argument registers.