Other Parts Discussed in Thread: INA226
Hello,
I'm currently using the LMP92064 on a custom board and, for comparison, on the LMP92064 EVM board. The EVM board and the custom board have the same behavior and a very similar circuit design.
After analyzing the effective resolution in bits, I found that the lowest 4 bits on both ADCs, current path and voltage path, are very noisy. I can average the values, which works quite good, but only 8 bits of effective resolution for a 12 bit ADC seems like a little bit too much noise. I was expecting about 2 bits of noise for a 12bit ADC.
Is that kind of noise expected? Do I have to split the V_digital and V_analog inputs to get a more stable reading? Or is that the trade off for the 125kSps?
Thank you very much in advance
and Happy Holidays
Lukas Eckert