PRELIMINARY TECHNICAL DATA
REV. PrD June 2002 *Adaptive Linear PowerTM is a trademark of Analog Devices, Inc. **Patents Pending
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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 70Ω
ΩΩ
Ω resistive
load)
o660mW total power consumption for overlapped
applications (20.4 dBm line power into 70Ω
ΩΩ
Ω resistive
load)
• MTPR of –67.4dBc (526KHz, 5.3 Crest Factor, non-
overlapped, RL= 70Ω
ΩΩ
Ω)
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 69.8Ω 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
