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STLC3055N Datasheet(PDF) 26 Page - STMicroelectronics

Part # STLC3055N
Description  WLL and ISDN-TA subscriber line interface circuit
PDF  34 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STLC3055N Datasheet(HTML) 26 Page - STMicroelectronics

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Electrical characteristics
STLC3055N
26/34
6.1
Test circuits
Referring to the application diagram shown in Figure 8 on page 20 and using as external
components the typical values specified in the Table 10 on page 17 and Table 11 on
page 18, find below the proper configuration for each measurement.
All measurements requiring DC current termination should be performed using "Wandel &
Goltermann DC Loop Holding Circuit GH-1" or equivalent.
Figure 10.
2W return loss 2WRL = 20Log(|Zref + Zs|/|Zref-Zs|) = 20Log(E/2Vs)
Figure 11.
THL trans hybrid loss THL = 20Log|Vrx/Vtx|
Figure 12.
G24 transmit gain G24 = 20Log|2Vtx/E|
TIP
RING
RX
TX
STLC3055N
application
circuit
W&G GH1
Zref
E
Vs
1Kohm
1Kohm
100
μF
100mA
DC max
Zin = 100K
200 to 6kHz
600ohm
100
μF
TIP
RING
RX
TX
STLC3055N
application
circuit
W&G GH1
Vrx
Vtx
100
μF
100
μF
100mA
DC max
Zin = 100K
200 to 6kHz
600ohm
TIP
RING
RX
TX
STLC3055N
application
circuit
W&G GH1
E
Vtx
100
μF
100
μF
100mA
DC max
Zin = 100K
200 to 6kHz
600ohm



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