Hi!
I'm designing a PCB using PGA2311 IC. It takes a line level signal and can attenuate (up to 95dB) or amplify (up to 31dB) the signal. Source impedance is specified to be <600 Ohms, and with regard to output impedance it has the "capability to drive 660-Ω loads directly without buffering".
So - I initially drew my PCB with relatively fat traces (1.0mm) for input and output audio, just because I have the space. I recognise that the trace length needs to be as short as possible, so the audio switching and PGA are located close together and close to the edge of the PCB.
View attachment 1095801
My question is - is it better in any respect (immunity to noise??) to use a narrower PCB trace for these high impedance audio lines? What is the 'right' thing to do? I really want to get this right so I would value any constructive feedback!
Thanks!
Pops
