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8 years, 7 months ago.
agnd SB60
hello guys i want to know that if SB60 is the only bridge bewteen AGND and GND because i took the fuse off but there is still continuity between AGND and GND.. thank you all..
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Further to your previous post. AGND is connected inside the actual micro removing SB60 removes the connection between the AGND of the micro through the PCB tracks back to the micro and potential 'ground loop' noise etc., removing SB60 allows to to connect to your 'sensing element' with cables right upto the micros internal circuits. You can't have a 'floating' AGND not referenced at all. That would be more advanced and you would need to get into the realms of Differential amplifiers etc to improve common mode rejection (CMR) twisted pair and screened cabling, filtering etc., hope this explains
posted by Martin Simpson 04 Sep 2015