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2238: add spec on max voltage with term 

Updates #35.
Same termination structure as bnc/sma-ttl card.
Technically the max allowable voltage with termination is a bit higher than 5V.
But it seems that it will still exceed the termination resistor rating limit at 5.5V.
The only method of acquiring V_ds & other parameters is by eye-balling the I-V curve of the MOSFET, which is not precise.
So the calculation assumes V_ds=0, just to be conservative.
nix_fix
occheung 2022-06-17 16:07:17 +08:00
parent 2964e13102
commit 2d0a866274
1 changed files with 2 additions and 1 deletions
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2238.tex
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@ -488,7 +488,7 @@ Both recommended operating conditions and electrical characteristics are based o
\textbf{Parameter} & \textbf{Symbol} & \textbf{Min.} & \textbf{Typ.} & \textbf{Max.} &
\textbf{Unit} & \textbf{Conditions} \\
\hline
Input voltage & $V_{I}$ & 0 & & 5.5 & V \\
Input voltage & $V_{I}$ & 0 & & 5.5* & V \\
\hline
High-level output current & $I_{OH}$ & & & -24 & mA \\
\hline
@ -496,6 +496,7 @@ Both recommended operating conditions and electrical characteristics are based o
\hline
Input edge rate & $\frac{\Delta t}{\Delta V}$ & 0 & & 10 & ns/V & $0.8V \leq V_I \leq 2.0V$ \\
\thickhline
\multicolumn{7}{l}{*With the 50\textOmega~termination enabled, the input voltage should not exceed 5V.}
\end{tabularx}
\end{threeparttable}
\end{table}