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PCB layout designer rules
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1.) seperate the power grounds, signal grounds, analog grounds, digital grounds, control grounds
2.) Keep inputs and outputs seperated and isolate to prevent oscillations
3.) Oscillation can happen from the inverting input and non-ineverting input of op-amps, coupling between parallel signal traces
4.) Place Capacitors that bypass supply voltages or decouple very close to the IC chip pins
5.) Use VIAS for signal grounds
6.) Keep power and ground track/traces running close proximity?
7.) Need Proper terminations of unused Op amp pins or sections
8.) Give good spacing and Clearance between tracks and pads
9.) Put Reference designators are both on the schematic and on the PCB silkscreen to help troubleshooting
10.) Put alot of TEST POINTs on the PCB's for each stage/section to break down into blocks to help troubleshooting
11.) Put alot of board cut/jumpers to isolate sections & stages from the power supply, to each stage/section on the circuit to isolate them if needed to troubleshoot or seperate the power supply if blown
12.) Put connections on the edges of the PCB's
13.) Isolate and seperate multiple inputs and outputs VCC and Grounds
example. if you have 7 input molex connectors and 7 output molex connector and their is a SHORT from VCC to ground it will damage every single input and output IC chips
14.) Keep the Clock signal seperate/isolated from analog signals or amplication inputs

 

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