THS7103 Datasheet, PDF (1/9 Pages) Texas Instruments – ADSL (ISDN) CENTRAL OFFICE LINE INTERFACE DRIVER/RECEIVER

THS7103
SLOS387 − DECEMBER 2001
ADSL (ISDN) CENTRAL OFFICE LINE INTERFACE DRIVER/RECEIVER
FEATURES
D 15-V Single Supply Operation
D Low 1.1-W Total Power Consumption
− 0.9-W Transmit Drivers
− 0.2-W Receive Channel
D Active Termination Differential Line Drivers
− No Line Matching Resistors Reduces
Output Voltage and Power Consumption
by up to 50%
D Integrated Differential Receivers
D Includes Analog Filters in Both Transmit and
Received Channels
D Multiple Power Saving Modes
− Bias Current Is Adjustable in 20%
Increments to Allow Lower Power Modes
for Short Line Lengths
APPLICATIONS
D Full Rate ADSL Central Office Line
Driver/Receiver for ISDN Applications
DESCRIPTION
The THS7103 is a low power differential ADSL (ISDN)
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 THS7103
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 THS7103 to
operate on a single 15-V supply, easing power supply
requirements.
The THS7103 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.
VFP PACKAGE
(TOP VIEW)
BUFEN
1BUFOUT
1BUFIN
RXOUTP
RXOUTN
2BUFIN
2BUFOUT
RXCM
32 31 30 29 28 27 26 25
1
24
2
23
3
22
4
PowerPAD
21
5
20
6
19
7
18
8
17
9 10 11 12 13 14 15 16
VCCOP1
TXAS1
TXAF
TXAS2
VCCON
TXBS2
TXBF
TXBS1
NC − No internal connection
SIMPLIFIED BLOCK DIAGRAM
Tx In+
Tx In−
Rx Out+
Rx Out−
Preamp BPF Driver
Receiver LPF Preamp
Tx Out+
Tx Out−
Rx In+
Rx In−
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
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.
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.
www.ti.com
Copyright  2001, Texas Instruments Incorporated
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