Hi,
I need to connect an active Low_Pass filter to a PIC18F with a 12bit ADC.
I will use some software to make the appropriate calculation but I do not know what kind of
frequency do I need to filter so that the ADC get a reasonably low noise signal.
The signal to be converted is a dc voltage, but it is 12cm away from the PIC18F.
What should I consider? Is the conversion rate an issue?
The voltage range is from 0V to 5V and I will need to measure a minimum of 5mV.
Maybe a simple RC filter followed by a good OPAMP is best?
Any ideas to help me going?
Regards
Francesco C
I need to connect an active Low_Pass filter to a PIC18F with a 12bit ADC.
I will use some software to make the appropriate calculation but I do not know what kind of
frequency do I need to filter so that the ADC get a reasonably low noise signal.
The signal to be converted is a dc voltage, but it is 12cm away from the PIC18F.
What should I consider? Is the conversion rate an issue?
The voltage range is from 0V to 5V and I will need to measure a minimum of 5mV.
Maybe a simple RC filter followed by a good OPAMP is best?
Any ideas to help me going?
Regards
Francesco C