Hello,

I am using ADE7757 for my energy meter reading. So I got the data as mentioned below.

**Load: 0 W**

CF - 0 Hz

V1 - 25mV

V2 - 66mV

**Load: 21 W**

CF - 3 Hz

V1 - 25 mV

V2 - 66 mV

**Load: 171 W**

CF: 80Hz

V1: 24 mV

V2: 75 mV

SCF = 0 for all

S1,S2 = 1 for all

So How to calculate CF pulse in theory ? is this CF pulse is correct or not according to load ?

Hi njmehta11,

Freq = 515.85*V1rms*V2rms*F1-4/VREF^2, this is the way to calculate F1 frequency. As you selected S1=S2=1, so F1-4=6.86 Hz, and if you select SCF=0, F2= 2048*F1, that's the theoretical value of CF, CFexpected = F2. V1rms value should be the rms value you put at V1P and V1N. V2rms should be the rms value you put between V2P and V2N. What's the resistor value you put between RCLKIN and ground? Thank you very much!

Best regards,

Gary