ACS712 datasheet says it has bandwith of 80kHz.
What does it mean?
Does the bandwith matter or mV/A is more important?
I want to measure a high resolution sine wave.
It means it can measure signals between DC and 80kHz in frequency.
1 Like
It helps to provide a link - like this
Do you mean you want to measure a current that is very precisely sinusoidal in magnitude?
Or you want to MEASURE it to a high degree of precision? or accuracy? or both?
I want to only measure an AC sine wave including the harmonics and surges.
I want to measure harmonics of an ac circuit.
60Hz to 10KHz I guess?
I want to measure harmonics.
@asd09 : we are all trying to help but you dont seem to be able to explain in more than a very few words.
so lets try some simple questions. Please answer all four.
1: WHY do you want to do this?
2: Are you going to use an Arduino?
3: if so which one? (give a link)
4: How will you measure the voltage from the ACS712?
Also, if you want to measure harmonics, you need to consider the linearity of the device which will introduce harmonics of their own. From a quick look at the datasheet the linearity is given as ~0.3% but it isn't obvious what that means. Depending on which harmonics of the AC signal you want to measure and to what accuracy it could be insignificant or huge. If this isn't linear enough you could consider using a current transformer instead. What level of harmonics do you want to measure?
Why do you specifically want to measure the current, why not the voltage harmonics? At least that would take one uncertainty out of the system.
If you intend to digitise the current sensor output and do a spectral analysis, the linearity of the ADC will also be important.
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.