STLC3075(2005) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STLC3075
(Rev.:2005)

INTEGRATED POTS INTERFACE FOR HOME ACCESS GATEWAY AND WLL

STMicroelectronics 

STLC3075

5 APPENDIX A

5.1 STLC3075 Test Circuits

Referring to the application diagram shown in fig. 11 and using as external components the Typ. Values

specified in the "External Components" Tables 10 and 12 (pages 11 and 12) find below the proper config-

uration for each measurement.

All measurements requiring DC current termination should be performed using "Wandel & Goltermann

DC Loop Holding Circuit GH-1" or equivalent.

Figure 13. 2W Return Loss

2WRL = 20Log(|Zref + Zs|/|Zref-Zs|) = 20Log(E/2Vs)

W&G GH1

Zref

600ohm

1Kohm

100 F

Vs

100mA

DC max

E

Zin = 100K

200 to 6kHz

1Kohm

100 F

TIP

TX

STLC3075

application

circuit

RING

RX

Figure 14. THL Trans Hybrid Loss

THL = 20Log|Vrx/Vtx|

W&G GH1

600ohm

100 F

100mA

DC max

Zin = 100K

200 to 6kHz

100 F

TIP

TX

Vtx

STLC3075

application

circuit

RING

RX

Vrx

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