PRELIMINARY TECHNICAL DATA
REV. PrD June 2002 *Adaptive Linear PowerTM is a trademark of Analog Devices, Inc. **Patents Pending
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use; nor for any infringements of patents or other rights of third parties which
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 ©Analog Devices, Inc., 2002
Adaptive Linear PowerTM
+12V ADSL-CO Line Driver
Preliminary Technical Data AD8393
FEATURES
Analog Devices’ Adaptive Linear PowerTM architecture
oLow power consumption for DSL line driver
applications
oEnables high port density Central Office modems.
Single +12V supply (or +/-6V supplies)
o600mW total power consumption for non-overlapped
applications (19.8dBm line power into 70
resistive
load)
o660mW total power consumption for overlapped
applications (20.4 dBm line power into 70
resistive
load)
MTPR of –67.4dBc (526KHz, 5.3 Crest Factor, non-
overlapped, RL= 70
)
BENEFITS
Reduces system complexity and cost – Low power
architecture enables greater port density, reduced thermals,
and lower system power.
Simplifies line card voltage requirements – Single supply
operation (+12V) for CO designs.
APPLICATIONS
ADSL DSLAMs
xDSL line cards using DMT signals
PRODUCT DESCRIPTION
a
The AD8393 is a low power, high output current, low
distortion line driver that enables increased port density in
DSL line card designs. The AD8393 features ADI’s
Adaptive Linear PowerTM architecture, which delivers the
same performance typically found with +/-12V drivers, but
does so with a single +12V supply. The AD8393 is designed
to drive DMT (Discrete Multi-Tone) signals with a Peak to
Average Ratio of 3.3 to 6.4. Driving a DMT signal with a
Peak to Average Ratio of 5.3, the AD8393 consumes only
600mW of total power for non-overlapped ADSL
applications (19.8dBm line power into 69.8 resistive load).
The AD8393-1 has been optimized for peak input signals
(PMPP-PMPN) of 1.0V to 1.3V. The AD8393-2 has been
optimized for peak input signals (PMPP-PMPN) of 0.6V to
0.9V.
The AD8393 is available in a 32L 5x5mm LFCSP package.
Fig. 2. AD8393 single +12V supply operation showing
Adaptive Linear PowerTM supplies and driver outputs.
Internally, the supplies (Vccp, Veep) are brought outside
the rails to accommodate peaks above 12 V and below
GND.
To inquire about AD8393 samples and an evaluation board,
contact Analog Devices via email at:
high_current_drivers.com@analog.com
Fi
g
. 1. AD8393 MTPR Performance