THS7102

ADSL (POTS) CENTRAL OFFICE LINE INTERFACE DRIVER/RECEIVER

SLOS311B− MAY 2000 − REVISED DECEMBER 2001

8

POST OFFICE BOX 655303

APPLICATION INFORMATION

VAG

Ci§

Ci§

VIN‡

TXINP

TXINN

1BUFIN

1BUFOUT

BUFEN

2BUFOUT

2BUFIN

RXCM

RXOUTP

RXOUTN

TXEN1

TXEN2

TXAS1

TXAF

TXAS2

TXBS2

TXBF

TXBS1

VCCON

RXPO

RXPI

RXPN

RXMN

RXMI

RXMO

VCCOP2

RxOut

RS†

VA

15 V

VB

RL

15 V

VCCL

GND

VCCOP1

THS7102

1:N

TXCM

RS†

Point A

Point A

VAG

† Output impedance of transmit driver at point A = 10 × RS

‡ Maximum input of VIN = 3 Vpp.

§ In ADSL systems, it is recommended to use Ci = 680 pF for the THS7102. For testing purposes, use Ci = 0.1 µF

Figure 3. Typical THS7102 Circuit Configuration