Hi, I am currently working on a custom PCB project using the Teensy 4.0 with the CS42448 codec chip, based off the example project here.
For my project I would like to achieve maximum fidelity / signal to noise ratio, and as such I am interested in using the differential input / output option (either way I am going to add active amplification / filtering to the I/O, so making this differential as opposed to single ended is not a huge increase in scope). I am wondering:
-What effect this is likely to have on fidelity (I assume the difference will be very slight, but hopefully measurable)
-Whether there is any additional modification or configuration will I have to do to make this work with the Audio library code for the CS42448 and the example project circuit. My understanding is that the differential IO is always active, and that in the case they are unused they are simply left floating (in the case of the negative differential outputs) or connected to ground via a capacitor (in the case of the negative differential inputs), and that to make use of the differential I/O I simply have to make the proper connections between the codec IO pins and my amplification / filter circuitry. Is this understanding correct?
Thanks!
For my project I would like to achieve maximum fidelity / signal to noise ratio, and as such I am interested in using the differential input / output option (either way I am going to add active amplification / filtering to the I/O, so making this differential as opposed to single ended is not a huge increase in scope). I am wondering:
-What effect this is likely to have on fidelity (I assume the difference will be very slight, but hopefully measurable)
-Whether there is any additional modification or configuration will I have to do to make this work with the Audio library code for the CS42448 and the example project circuit. My understanding is that the differential IO is always active, and that in the case they are unused they are simply left floating (in the case of the negative differential outputs) or connected to ground via a capacitor (in the case of the negative differential inputs), and that to make use of the differential I/O I simply have to make the proper connections between the codec IO pins and my amplification / filter circuitry. Is this understanding correct?
Thanks!