Hi,

as far as i have understood from searching maximum post on energy meter forum and your product there are only few ics which measure harmonics distortion, one series is ADE7978 with ADE7932/ADE7933/ADE7923 and another is ADE7880. Is it correct

1- Can you please let me know the difference between these series except isolation?

2- I want to measure single phase 50Hz 90V-440V, 0.01A-10A AC with 0.5% accuracy, is it possible to do that if yes with what accuracy level? and with which series?

I know i need to step down the voltage into desired range of IC input and need to use shunt / CT for current measurement.

3- at multiple location it is said the dynamic range of 500:1 or 1000:1. what does it mean exactly. say for example in my case, should i calculate the Dynamic range = 440V / 90V = 4.9 (in my case for voltage). or it will be

Dynamic range = (Vmax X 100) / (2 X accuracy x Vmin) = 500 (in my case for voltage).

4- Will it get total harmonic distortion of voltage and current separately or i will get harmonic distortion separately say upto 63? and in second case from where i will found it?

5- Is it possible to measure DC with high ripple with any of these IC?

6- why i can't use the shunt for measuring current with ADE7880?

Sorry, i know that i have put many question in single post, but it was just to save TAT.

Thanks in advance.

with regards,

Ankush

Hi Ankush,

That is correct, in the current ADE family it is the ADE7978 and the ADE7880 which measure THD.

Let me know if you have any other questions.

Regards,

Dlath