Re: Mid Reference Capacitor
Posted: Sun Jun 07, 2020 3:08 pm
Interesting discussion.
I've been using 85 c 1uf electrolytics in my design for the ref and mid caps. I haven't seen any issues with ADC or DAC conversion.
This is OT, but I managed to get the chip's noise performance below -100dB unweighted. I won't say exactly how low, but I will say that I don't have to use any external audio path filtration with the chip. My dev research showed that the FV-1 is sensitive to power supply noise (like all converters). Also, it sounds WAY better at 3.3v than it does at 3v.
The one thing I found that just drove me nuts during dev was fighting clock noise on power supply pins. Not sure if that's a normal issue? I resolved it eventually.
Anyway, just my 2 cents about the ref and mid caps.
I've been using 85 c 1uf electrolytics in my design for the ref and mid caps. I haven't seen any issues with ADC or DAC conversion.
This is OT, but I managed to get the chip's noise performance below -100dB unweighted. I won't say exactly how low, but I will say that I don't have to use any external audio path filtration with the chip. My dev research showed that the FV-1 is sensitive to power supply noise (like all converters). Also, it sounds WAY better at 3.3v than it does at 3v.
The one thing I found that just drove me nuts during dev was fighting clock noise on power supply pins. Not sure if that's a normal issue? I resolved it eventually.
Anyway, just my 2 cents about the ref and mid caps.