LMP8481: Computing Current Sense Amplifier Error

Tool/software:

Hello-

I am using the -S and -T versions of the LMP8481 current sense amplifier.

I am using TI's "Current Sense Amplifier Comparison and Error Calculator"  https://www.ti.com/tool/CS-AMPLIFIER-ERROR-TOOL spreadsheet and I have some questions.

1) I do not understand how the e_CMRR and e_PSRR are calculated; there is some magic that happens to convert the CMRR and PSRR from dB to uV/V that I am not following.

2) This current sense amplifier feeds into an ADC in my circuit. How would I go about computing the total error in the sensed current; taking into account ADC sources of error?

Thanks!

-M