L3234 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
L3234 Datasheet PDF : 26 Pages
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L3234 - L3235
Figure 13: DC characteristic in Active Mode with two different values of limiting current (30mA and 70 mA).
Figure 14: Line current versus loop resistance with two different values of limiting current (30mA and
70mA)
AC characteristic
A simplified AC model of the transmission circuits
is shown in figure 15.
Where :
Vrx is the received signal
Vtx is the transmitted signal
Vl is the AC transversal voltage at line terminations.
Eg is the line open circuit AC voltage
Zl is the line impedance
Rp are the protection resistors
ZB is the line impedance balancing network
ZA is the SLIC impedance balancing network
ZAC program the AC line termination impedance
RPC used for external protection resistors insertion
loss compensation
Il/50 is the AC transversal current divided by 50
CAC AC feedback current decoupling
15/26
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