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dio: add spec sources 

Also remove propagation delay specs from LVDS-TTL.
PCB traces would make a significant impact.
This commit is contained in:
occheung 2022-01-14 14:09:25 +08:00
parent 7230cdbec1
commit 3654502d1b
3 changed files with 10 additions and 13 deletions
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1
2118-2128.tex
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@ -341,6 +341,7 @@ The card support a minimum pulse width of 3ns.
\section{Electrical Specifications}
All specifications are in $0\degree C \leq T_A \leq 70\degree C$ unless otherwise noted.
Pulse width distortion \& peak jitters are based on the isolator IC (SI8651BB-B-IS1), other specifications are based on the bus transceivers IC (SN74BCT25245DW).
\begin{table}[h]
\begin{threeparttable}

6
2238.tex
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@ -473,6 +473,9 @@ This card can achieve higher speed and lower jitter than the isolated 2118/2128
\onecolumn
\section{Electrical Specifications}
Both recommended operating conditions and electrical characteristics are based on the datasheet of the bus transceivers IC (74LVT162245MTD).
\begin{table}[h]
\begin{threeparttable}
\caption{Recommended Operating Conditions}
@ -493,7 +496,6 @@ This card can achieve higher speed and lower jitter than the isolated 2118/2128
\end{threeparttable}
\end{table}
The recommended operating temperature is $-40\degree C \leq T_A \leq 85\degree C$.
All specifications are in the recommended operating temperature range unless otherwise noted.
\begin{table}[h]
@ -541,7 +543,7 @@ IO direction switches partly decides the IO direction of each bank.
\columnbreak
\begin{center}
\centering
\includegraphics[height=1.8in]{mcx_ttl_switches.jpg}
\includegraphics[height=1.7in]{mcx_ttl_switches.jpg}
\captionof{figure}{Position of switches}
\end{center}
\end{multicols}

16
2245.tex
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@ -334,6 +334,9 @@ Only shielded Ethernet Cat-6 cables should be connected.
\onecolumn
\section{Electrical Specifications}
Information in this section is based on the datasheet of the repeaters IC (FIN1101K8X).
The Absolute Maximum Ratings are thorse values beyond which damage to the device may occur
Other specifications should be met without exception.
@ -398,10 +401,6 @@ All typical values of DC specifications are at $T_A = 25\degree C$.
Short circuit output current & $I_{OS}$ & & $\pm3.4$ & $\pm6$ & mA & \\
\hline
Input current & $I_{IN}$ & & & $\pm20$ & \textmu A & Recommended Input Voltage \\
\hline
Input capacitance & $C_{IN}$ & & 2.0 & & pF & \\
\hline
Output capacitance & $C_{OUT}$ & & 2.6 & & pF & \\
\thickhline
\end{tabularx}
\end{threeparttable}
@ -410,6 +409,7 @@ All typical values of DC specifications are at $T_A = 25\degree C$.
\newpage
All typical values of AC specifications are at $T_A = 25\degree C$, $V_{ID} = 300mV$, $V_{IC} = 1.3V$ unless otherwise specified.
Information regarding propagation is not applicable due to the lack of trace length matching.
\begin{table}[h]
\begin{threeparttable}
@ -419,19 +419,13 @@ All typical values of AC specifications are at $T_A = 25\degree C$, $V_{ID} = 30
\textbf{Parameter} & \textbf{Symbol} & \textbf{Min.} & \textbf{Typ.} & \textbf{Max.} &
\textbf{Unit} & \textbf{Conditions} \\
\hline
Differential Propagation delay & \multirow{2}{*}{$t_{PLHD}$} & \multirow{2}{*}{0.75} & \multirow{2}{*}{1.1} & \multirow{2}{*}{1.75} & \multirow{2}{*}{ns} & 100\textOmega~ between +/- outputs,\\
(LOW-to-HIGH) & & & & & & 5pF between each output and GND,\\
\cline{0-5}
Differential Propagation delay & \multirow{2}{*}{$t_{PHLD}$} & \multirow{2}{*}{0.75} & \multirow{2}{*}{1.1} & \multirow{2}{*}{1.75} & \multirow{2}{*}{ns} & $200 mV \leq V_{ID} \leq 450 mV$,\\
(HIGH-to-LOW) & & & & & & recommended $V_{IC}$,\\
\cline{0-5}
Differential Output Rise Time & \multirow{2}{*}{$t_{TLHD}$} & \multirow{2}{*}{0.29} & \multirow{2}{*}{0.40} & \multirow{2}{*}{0.58} & \multirow{2}{*}{ns} & duty Cycle = 50\%.\\
(20\% to 80\%) & & & & & & \\
\cline{0-5}
Differential Output Fall Time & \multirow{2}{*}{$t_{THLD}$} & \multirow{2}{*}{0.29} & \multirow{2}{*}{0.40} & \multirow{2}{*}{0.58} & \multirow{2}{*}{ns} & \\
(80\% to 20\%) & & & & & & \\
\cline{0-5}
Pulse skew & $t_{SK(P)}$ & & 0.01 & 0.2 & ns & \\
Pulse width distortion & $PWD$ & & 0.01 & 0.2 & ns & \\
\hline
LVDS data jitter, & \multirow{2}{*}{$t_{DJ}$} & & \multirow{2}{*}{85} & \multirow{2}{*}{125} & \multirow{2}{*}{ps} & $PRBS=2^{23}-1$\\
deterministic & & & & & & 800 Mbps\\