\documentclass[border=0mm]{standalone}

\usepackage{cmap}
\usepackage[cp1250]{inputenc}	
\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{lmodern}
\usepackage{tikz}
\usepackage{float}
\usepackage{siunitx}
\usepackage{amsmath}
\usepackage{upgreek}
\usepackage{pgfplots}
\pgfplotsset{compat=1.17}
\usepgfplotslibrary{fillbetween}
\usepgfplotslibrary{units}
% \makeatletter
%\pgfplotsset{
%  unit code/.code 2 args=
%    \begingroup
%    \protected@edef\x{\endgroup\si{#2}}\x
%} 
%\makeatother

\pgfkeys{%
  /tikz/on layer/.code={
    \pgfonlayer{#1}\begingroup
    \aftergroup\endpgfonlayer
    \aftergroup\endgroup
  }
}

\begin{document}
	\begin{tikzpicture}
		\begin{axis}[
			height=7cm,	width=11cm,	grid=major,
    		x unit=\SI{}{\nano\second}, y unit=\SI{}{\micro\ampere},
			xlabel=$t_\mathrm{in}$,	ylabel=$\mathit{RMS}(I_\mathrm{out})$,
			ymin=-6,ymax=6,
			xmin=-1.6, xmax=1.6,
			ytick distance = 2,
			xtick distance = 0.4,
			set layers,
			%y tick label style={/pgf/number format/.cd, set thousands separator={}},
			xticklabel shift = 2 pt,
			legend pos=north east
		]					
			
			\addplot +[solid, thick,color=blue,mark=none] table [x expr=\thisrow{nomx}*1e9, y expr=\thisrow{nomy}*1e6, col sep=semicolon] {../cadence_data/fpd_transfer.csv};
			\addplot +[name path = FF, solid, thick,color=blue, draw=none,mark=none] table [x expr=\thisrow{x1}*1e9, y expr=\thisrow{max}*1e6, col sep=semicolon] {../cadence_data/fpd_transfer.csv};
			\addplot +[name path = SS, solid, thick,color=blue,draw=none,mark=none] table [x expr=\thisrow{x1}*1e9, y expr=\thisrow{min}*1e6, col sep=semicolon] {../cadence_data/fpd_transfer.csv};	
			\addplot[blue, fill opacity = 0.15] fill between[of=SS and FF];
			%\draw [-,dashed] (axis cs:0,625) -- (axis cs:40,625) ;
			%\node [] at (axis cs:5.5,685) {$\SI{625}{\mega\hertz}$};
			
		\end{axis}
	\end{tikzpicture}
\end{document}