Dave

Hey, I definitely had to fiddle with the RC network a bit to get a good looking response. I think in the end I went with an empirical choice, but...

Just so we're on the same page, this is what you should expect for DC if you have a 3.3V bank and 16-bit ADC (_max_ = 65536) - 0V ->...

Can you try using OVERSAMPLE_RATIO=256 in your next build and compare the result? Also could try making the capacitor large and see if there is an improvement.

Gotcha, thought you were using OVERSAMPLE_RATIO=8. What do you mean 'without losing or offset'? You can see here that that 1.0V amplitude is attenuated slightly: https://github.com/davemuscle/sigma_delta_converters#adc-standard-measurement

I see now. Will have to setup my station at some point and try it. For now I'd recommend testing different RC networks and seeing if there is an improvment

Set the hardware back up and performed some DC measurements: - Voltage = 0 Digital = 779 Expected = 0.0 - Voltage = 0.025 Digital = 802 Expected = 124.12...

It moves around, there will always be variance on the lower bits. I would say it isn't "epically" though. This is for 1V DC:  At this point it may...

I used the hardware setup as-is from here (no filter): https://github.com/davemuscle/sigma_delta_converters/blob/master/rtl/hw_test/top.sv It may also be a good idea to scope your ground pin, if possible. Depending on your hardware setup,...

I'd have to set back up the hardware -- I'm using this FPGA board for a few different things. What good would recapturing be without changes? Here are my recorded...

A few questions about the hardware setup picture, assuming you don't have a breadboard offscreen: 1. Is the resistor leg twisted around the male jumper pin? If that moves around...