Hello again. I am currently trying to build my first shield for the stm32f103c8t6.I am planning on implementing an external ADC to allow improved data acquisition (MCP3903).However, I have a few questions that I need some help with and would appreciate some input.I am trying to reduce the noise picked up by the external ADC. Are there specific things thatI need to look out for? For example: a)The ADC MCP3903 has 6 differential signal inputs which I would like to pair with 1x3.3V ,1x5V and GND each via a micro usb interface. Would the power lines influence the signal lines? b)To my understanding Analogue and Digital ground should be separated. However, I am unsure how to do this correctly. From what I have read on forums, many only use a Capacitor connecting the two. Is that sufficient or is there a better method. It would be nice to maybe get a solution via an example c)The power supply usually carries noise which will be used as external reference used by the ADC. what would be the best & simplest solution to suppress the noise?Thank you for your time.