THS6012

500-mA DUAL DIFFERENTIAL LINE DRIVER

SLOS226C– SEPTEMBER 1998 – REVISED FEBRUARY 2000

29

POST OFFICE BOX 655303

APPLICATION INFORMATION

ADSL

The THS6012 was primarily designed as a line driver and line receiver 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

THS6012 is specified for a minimum full output current of 400 mA at its full output voltage of approximately 12

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 47.

_

+

6.8

µF

0.1

µF

–15 V

6.8

µF

0.1

µF

15 V

1 k

Ω

1 k

Ω

+

+

VI+

_

+

6.8

µF

0.1

µF

–15 V

6.8

µF

0.1

µF

15 V

1 k

Ω

1 k

Ω

+

+

VI–

+

–

1 k

Ω

0.1

µF

1 k

Ω

2 k

Ω

12.5

Ω

+

–

1 k

Ω

0.1

µF

1 k

Ω

2 k

Ω

1:2

Telephone Line

12.5

Ω

–15 V

15 V

15 V

–15 V

0.01

µF

THS6062

THS6062

VO+

VO–

THS6012

Driver 1

THS6012

Driver 2

100

Ω

Figure 47. THS6012 ADSL Application