Hello, I'm working on the project with ade7756 but I'm new for ADE7756. I have some questions. I use the scheme with 240V->0.470V and 2A->0.001A (1:2000 current transformer). I would like to know how ADC converts voltages on the ch1 and ch2 to numbers. Also I can read values of ch1, ch2 and LPF2 but I don't understand it. Could you explain how to calculate value of LPF2? or how to multiply values of ch1, ch2?.

Hi bucktsooj

The registers such as WAVEFORM, AENERGY and RSTENERGY can provide you with necessary power/energy data. In order to comprehend the register values and convert them to watts or watt-hours, you will need to gain calibrate the IC. The process involves applying a known set of input signals and equating the register result to the expected active energy/power result. Page 24 of the datasheet explains how to calculate average active power from the register contents. If 480watts is the expected average active power and the average computed register result is 1453d. Then, the watt/LSB conversion constant is 480/1453. Now, when you apply different voltage and current signals, multiply the average power (register) result with this conversion constant. If energy calibration is done, integration time is also used in the calculation. Let me know if this helps you.

Regards

hmani