3.3/5v Power supply issues?

[mglavind]

Im unsure if the amplifier will work as good with 3.3v in stead of the original 5V. The datasheet (as I read it) says that its supported, but I'm unsure of the consequences for the signal quality of the sensor output.

https://www.ti.com/product/OPA2376/part-details/OPA2376AID

[LokiMetaSmith]

3.3v is in the range of certified voltage and should not be an issue.

Reading over the datasheet, the only parameter of concern is the settling time and gain selection for the amplifier. This device is sensitive to temperature, frequency (rate of data acquisition settling time or variable signal of interest), and the fixed gain amplification of the signal of interest.

We probably need to document the expected total harmonic distortion of each contributing part of the signal measured as reported to the ADC to help better understand where noise comes from in the system.