REV.0
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a
AD8019
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2001
DSL Line Driver
with Power-Down
PIN CONFIGURATIONS
8
7
6
5
1
2
3
4
AD8019AR
–IN1
OUT1
OUT2
+IN1
–V
S
+V
S
–IN2
+IN2
14
13
12
11
10
9
8
1
2
3
4
5
6
7
AD8019ARU
NC = NO CONNECT
DGND
NC
PWDN
NC
NC
NC
OUT1
–IN1
+IN1
–V
S
OUT2
+V
S
–IN2
+IN2
FEATURES
Low Distortion, High Output Current Amplifiers
Operate from 12 V to H1155012 V Power Supplies,
Ideal for High-Performance ADSL CPE, and xDSL
Modems
Low Power Operation
9 mA/Amp (Typ) Supply Current
Digital (1-Bit) Power-Down
Voltage Feedback Amplifiers
Low Distortion
Out-of-Band SFDR –80 dBc @ 100 kHz into 100 H9024 Line
High Speed
175 MHz Bandwidth (–3 dB), G = +1
400 V/H9262s Slew Rate
High Dynamic Range
V
OUT
to within 1.2 V of Power Supply
APPLICATIONS
ADSL, VDSL, HDSL, and Proprietary xDSL USB, PCI,
PCMCIA Modems, and Customer Premise Equipment
(CPE)
PRODUCT DESCRIPTION
The AD8019 is a low cost xDSL line driver optimized to drive a
minimum of 13 dBm into a 100 Ω load while delivering outstand-
ing distortion performance. The AD8019 is designed on a 24 V
high-speed bipolar process enabling the use of ±12 V power
supplies or 12 V only. When operating from a single 12 V sup-
ply the highly efficient amplifier architecture can typically deliver
170 mA output current into low impedance loads through a
1:2 turns ratio transformer. Hybrid designs using ±12 V supplies
enable the use of a 1:1 turns ratio transformer, minimizing attenu-
ation of the receive signal. The AD8019 typically draws 9 mA/
amplifier quiescent current. A 1-bit digital power down feature
reduces the quiescent current to approximately 1.6 mA/amplifier.
Figure 1 shows typical Out of Band SFDR performance under
ADSL CPE (upstream) conditions. SFDR is measured while
driving a 13 dBm ADSL DMT signal into a 100 Ω line with
50 Ω back termination.
The AD8019 comes in thermally enhanced 8-lead SOIC and
14-lead TSSOP packages. The 8-lead SOIC is pin-compatible
with the AD8017 12 V line driver.
FREQUENCY – kHz
132.5
10dB/DIV
137.5 142.5
–80dBc
Figure 1. Out-of-Band SFDR; V
S
= ±12 V; 13 dBm Output
Power into 200 Ω, Upstream
8-Lead SOIC
(R-8)
14-Lead TSSOP
(RU-14)