_

+

6.8 mF

0.1 mF

6.8 mF

0.1 mF

VCC(H)15V

200 Ω

+

+

VI+

_

+

6.8 mF

0.1 mF

6.8 mF

0.1 mF

−VCC(H) −15 V

680 Ω

+

+

VI−

+

−

0.1 mF

2kΩ

12.5 Ω

+

−

2kΩ

1:2

TelephoneLine

12.5 Ω

15V

−15V

0.1 mF

THS6072

THS6072

VO+

VO−

THS6032

Driver1

THS6032

Driver2

100 Ω

VCC(L) 6 V

−VCC(L) −6 V

Driver

1kΩ

1kΩ

1kΩ

Receiver

0.1

m

F

0.1

m

F

680 Ω

1kΩ

THS6032

SLOS233F – APRIL 1999 – REVISED AUGUST 2009....................................................................................................................................................... www.ti.com

APPLICATION INFORMATION

ADSL

The THS6032 was primarily designed as a low-power line driver for ADSL (asymmetrical digital subscriber line).

The driver output stage has been sized to provide full ADSL power levels of 20 dBm onto the telephone lines.

Although actual driver output peak voltages and currents vary with each particular ADSL application, the

THS6032 is specified for a minimum full output current of 400 mA at its full output voltage of approximately 11 V.

This performance meets the demanding needs of ADSL at the central office end of the telephone line. A typical

ADSL schematic is shown in Figure 36.

Figure 36. THS6032 ADSL Application

The ADSL transmit band consists of 255 separate carrier frequencies, each with its own modulation and

amplitude level. With such an implementation, it is imperative that signals put onto the telephone line have as low

a distortion as possible. This is because any distortion either interferes directly with other ADSL carrier

frequencies or it creates intermodulation products that interfere with ADSL carrier frequencies.

12

Submit Documentation Feedback

Copyright © 1999–2009, Texas Instruments Incorporated

Product Folder Link(s): THS6032