Hi Guys,
HART uses FSK to encode digital information onto 4-20mA analog signals.
So I have a 4-20mA DC signal that has a sine wave at a frequency of 1200Hz for a 1 or 2200Hz for a 0. The sine wave has a 0.5mA peak (100 peak to peak) on top of the 4-20mA DC signal.
See this: http://www.smar.com/hart.asp
What I want to know is will I have enough resolution if I use a 16 bit ADC? Will I have issues with resolving the 1s and 0s? We are doing the filter/separation in the digital domain.
If not what resolution would I need for signal levels mentioned above?
Thoughts on this would be great.
HART uses FSK to encode digital information onto 4-20mA analog signals.
So I have a 4-20mA DC signal that has a sine wave at a frequency of 1200Hz for a 1 or 2200Hz for a 0. The sine wave has a 0.5mA peak (100 peak to peak) on top of the 4-20mA DC signal.
See this: http://www.smar.com/hart.asp
What I want to know is will I have enough resolution if I use a 16 bit ADC? Will I have issues with resolving the 1s and 0s? We are doing the filter/separation in the digital domain.
If not what resolution would I need for signal levels mentioned above?
Thoughts on this would be great.