cks3976
Full Member level 6
Hello Everyone,
I am working on a sensor data aggregation system that have analog signal conditioning circuits and I-V converter circuits built from Op-Amps. Analog feed from each of this sensors will be taken to the on-chip ADC of the ARM based processor for further analysis.
I would like to know if this would be a good idea to connect all the ground points of these Op-Amps to say "Analog GND" and the processor ground points to say "Digital GND" and finally short these grounds "somewhere" on the PCB with a "resistor" ?
I am seeing some noise in the first proto of this design, so your advice on separating the two grounds will help me in designing a "cleaner" circuit.
Looking forward for your advices..
I am working on a sensor data aggregation system that have analog signal conditioning circuits and I-V converter circuits built from Op-Amps. Analog feed from each of this sensors will be taken to the on-chip ADC of the ARM based processor for further analysis.
I would like to know if this would be a good idea to connect all the ground points of these Op-Amps to say "Analog GND" and the processor ground points to say "Digital GND" and finally short these grounds "somewhere" on the PCB with a "resistor" ?
I am seeing some noise in the first proto of this design, so your advice on separating the two grounds will help me in designing a "cleaner" circuit.
Looking forward for your advices..