THS6032_14 Datasheet, PDF (12/35 Pages) Texas Instruments – LOW-POWER ADSL CENTRAL-OFFICE LINE DRIVER

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.
V_CC(H)15 V
0.1
mF
THS6032
Driver 1
0.1 mF
+
6.8 mF
V_I+
+
_
12.5 Ω
1:2
680 Ω
0.1 mF
200 Ω
−V_CC(H) −15 V
V_CC(L) 6 V
THS6032
Driver 2
0.1
mF
V_I−
+
_
0.1 mF
6.8 mF
+
+
6.8 mF
680 Ω
12.5 Ω
Telephone Line
100 Ω
2 kΩ
1 kΩ
1 kΩ
15 V
0.1 mF
−
+
THS6072
V_O+
0.1 mF
−V_CC(L) −6 V
Driver
6.8 mF
+
2 kΩ
1 kΩ
1 kΩ
−
+ _THS6072
V_O−
0.1 mF
−15 V
Figure 36. THS6032 ADSL Application
Receiver
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
Product Folder Link(s): THS6032
Copyright © 1999–2009, Texas Instruments Incorporated