AD8019_15 Datasheet, PDF (1/20 Pages) Analog Devices – DSL Line Driver with Power-Down

a
DSL Line Driver
with Power-Down
AD8019
FEATURES
PIN CONFIGURATIONS
Low Distortion, High Output Current Amplifiers
Operate from 12 V to ؎12 V Power Supplies,
8-Lead SOIC
14-Lead TSSOP
Ideal for High-Performance ADSL CPE, and xDSL
(R-8)
(RU-14)
Modems
Low Power Operation
OUT1 1 ^AD8019AR 8 ^+VS
NC 1 AD8019ARU 14 NC
9 mA/Amp (Typ) Supply Current
–IN1 2
7 OUT2 ^{OUT1 2}
13 +V_S
Digital (1-Bit) Power-Down
Voltage Feedback Amplifiers
Low Distortion
Out-of-Band SFDR –80 dBc @ 100 kHz into 100 ⍀ Line
High Speed
175 MHz Bandwidth (–3 dB), G = +1
E _{400 V/␮s Slew Rate}
High Dynamic Range
V_OUT to within 1.2 V of Power Supply
T _APPLICATIONS
ADSL, VDSL, HDSL, and Proprietary xDSL USB, PCI,
PCMCIA Modems, and Customer Premise Equipment
(CPE)
E _{PRODUCT DESCRIPTION}
The AD8019 is a low cost xDSL line driver optimized to drive a
L _{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-
O ^{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-
S ^{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
B ^{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.
O ^{The AD8019 comes in thermally enhanced 8-lead SOIC and}
+IN1 3
–V_{S 4}
6 –IN2
5 +IN2
–IN1 3
+IN1 4
–V_S 5
PWDN 6
NC 7
12 OUT2
11 –IN2
10 +IN2
9 NC
8 DGND
NC = NO CONNECT
–80dBc
132.5
137.5
FREQUENCY – kHz
142.5
Figure 1. Out-of-Band SFDR; V_S = ±12 V; 13 dBm Output
Power into 200 Ω, Upstream
14-lead TSSOP packages. The 8-lead SOIC is pin-compatible
with the AD8017 12 V line driver.
REV. 0
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