u/N4pUnKnown

Hi everyone, i'm in the middle of designing my first circuit board and wanted to just get some general advice for pcb design, what the most important things are to look out for and maybe even if someone sees an obvious mistake i made during routing or something.

some context: I'm trying to sample the (differential) signals from 2 underwater microphones at 200 ksps (each) with a 16bit ADC and a teensy 4.1, which will save all the data to a micro sd card. So far the circuit works (on two breadboards) and this is the pcb i designed for everything to go on to.