THS7102

ADSL (POTS) CENTRAL OFFICE LINE INTERFACE DRIVER/RECEIVER

SLOS311B− MAY 2000 − REVISED DECEMBER 2001

1

POST OFFICE BOX 655303

Driver/Receiver for POTS Applications

− 0.9-W Transmit Drivers

− 0.2-W Receive Channel

− No Line Matching Resistors Reduces

Output Voltage and Power Consumption

by up to 50%

and Received Channels

− Bias Current Is Adjustable in 20%

Increments to Allow Lower Power Modes

for Short Line Lengths

description

The THS7102 is a low power differential ADSL

(POTS)

central

office

line

interface

driver/receiver. It features active termination

drivers that eliminate the matching resistors

required with traditional ADSL line drivers.

Removal of the matching resistors allows the

THS7102 to output nearly half the output voltage

as compared with traditional drivers, resulting in

power savings of up to 50% . The lower output

voltage levels resulting from the active termination

also allow the THS7102 to operate on a single

15-V supply, easing power supply requirements.

The THS7102 also features integrated differential receivers to reduce the component count on multichannel

ADSL line cards. To reduce valuable PCB space further, the transmit path integrates a band-pass filter while

the receive path integrates a low-pass filter. Four power-saving modes are featured on this device, allowing it

to operate at lower power levels for shorter line lengths.

THS7102 Features

Device

Application

Transmit

Bandpass Filter†

Receiver

Lowpass Filter

THS7102

ADSL (POTS)

152 kHz to 1.3 MHz

146 kHz

† When used in conjunction with the appropriate input capacitor (see the functional block

diagram information)

CAUTION: The THS7102 provides ESD protection circuitry. However, permanent damage can still occur if the device is subjected

to high-energy electrostatic discharge. Proper ESD precautions are recommended to avoid any performance degradation or loss

of functionality.

Copyright

 2001, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments.

VFP PACKAGE

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910

1

2

3

4

5

6

7

8

24

23

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17

VCCOP1

TXAS1

TXAF

TXAS2

VCCON

TXBS2

TXBF

TXBS1

BUFEN

1BUFOUT

1BUFIN

RXOUTP

RXOUTN

2BUFIN

2BUFOUT

RXCM

32

26

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NC − No internal connection

PowerPAD



Preamp

Driver

Preamp

Receiver

BPF

Tx Out+

Tx Out−

Rx In+

Rx In−

LPF

Tx In+

Tx In−

Rx Out+

Rx Out−

simplified block diagram