Hello, I'm trying to use ADE5169 evaluation software to read some energy values. I connected the current and voltage source properly to the chip and I used an oscilloscope to visualize the analog inputs. They seem ok (the circuits are correct too). However, I can't read a value that means a thing to me. So I did a search at Analog Device's site and discovered that I have to callibrate the sensor. I tried to do it using AN-950 and UG-061 instructions, but evaluation software doesn't allow me to write registers at energy metering section. So I wrote at those registers using the section Direct Read and Write to SFR/RAM, and it worked. I tried to read and do the same at energy metering section and it was the same, I couldn't do nothing using that section (also, the evaluation software always stop working for no reason, and I have to open it up again and again). The problem is, even if I can read and write (directly or indirecly) registers at SFR/RAM register, I don't know how to interpretate the huge value that appers when I read VRMSx or IRMSx registers. So I went back to ADE5169 datasheet.
At page 59, Voltage Channel RMS Calculation section, it says that the equivalent value of the full-scale ac signal (or 0.5V) is approximately 0d1,898,124 (0x1CF68C) in the VRMS SFRs and the conversion from the register value must be done externally in the microprocessor using a V/LSB constant. First thing I have done was to look Voltage Channel ADC section at page 51 (as datasheet sugested) and I didn't understand how the conversion is done and how I can get the volt value. Also, I searched for V/LSB constant and how its calculed and I found nothing, just a small text at AN-950, wich I didnt understand (even if I understand, how can I use this value to get volt value?). The main question is: If I know that 0.5 volts is represented by 0x1CF68C (according to page 59), how do I convert this value back to volts? I think It's related to Analog Devices Sigma delta ADC (I will read AN-282 note to see if I get an idea), but right know I am stuck.
PS: Is there another program that I can use to callibrate ADE5169? when I was reading AN-950, appears that exists a software only for callibration purposes (page 11 and 12), but I couldnt find this software.
Thank you so much,