ANALOG DEVICES AD8394 Service Manual
Low Power, High Output Current, Quad Op
4
3
2
Amp, Dual-Channel ADSL/ADSL2+ Line Driver
FEATURES
4 current feedback, high output current amplifiers
Ideal for use as ADSL/ADSL2+ dual-channel, central office
(CO) line drivers
Dual-supply operation from ±6 V to ±12 V
Single-supply operation from 12 V to 24 V
Low power consumption
700 mW internal power dissipation while driving 20.4 dBm
ADSL2+ signal (CF = 5.5)
3 active power modes plus shutdown
Low leakage current in shutdown mode
High output voltage and current drive
Low distortion
MTPR down to −70 dBc
High speed: 300 V/μs slew rate
APPLICATIONS
ADSL/ADSL2+ CO line drivers
xDSL line drives
High output current, low distortion amplifiers
DAC output buffers
GENERAL DESCRIPTION
The AD8394 is comprised of four high output current, low
power consumption operational amplifiers. It is particularly well
suited for the CO driver interface in digital subscriber line systems,
such as ADSL and ADSL2+. The driver can deliver 20.4 dBm to
a line, yet compensates for losses due to hybrid insertion and
back termination resistors. In addition, the low distortion, fast
slew rate, and high output current capability make the AD8394
ideal for other applications, such as medical instrumentation,
DAC output drivers, and other high peak current circuits. Four
bias modes are selectable via two digital inputs (PD0 and PD1).
The AD8394 is available in two thermally enhanced packages,
a 20-lead TSSOP_EP (AD8394AREZ) and a 4 mm × 5 mm
24-lead LFCSP (AD8394ACPZ).
For more information about the AD8394 email: broadband.products@analog.com.
AD8394
PIN CONFIGURATIONS
PD1 1, 2
24
8
PD1 3, 4
AD8394
+
–
–
+
+
–
–
+
VEE
PD0 1, 2
23
22
+
–
–
+
+
–
–
+
9
10
VCC
PD0 3, 4
20
VEE
19
V
OUT1
18
–V
IN1
17
–V
IN2
16
V
OUT2
15
V
OUT3
14
–V
IN3
13
–V
IN4
12
V
OUT4
11
VCC
06951-001
UT1
C
O
N
V
21
20
–V
19
IN1
–V
18
IN2
V
17
OUT
V
16
OUT
15
–V
IN3
14
–V
IN4
V
13
OUT
11
12
NC
NC
6951-002
1
PD0 1, 2
2
PD1 1, 2
3
+V
IN1
4
+V
IN2
5
GND
6
I
ADJ
7
+V
IN3
8
+V
IN4
9
PD1 3, 4
10
PD0 3, 4
Figure 1. AD8394AREZ, 20-Lead TSSOP_EP
+V
1
IN1
+V
2
IN2
GND
3
I
4
ADJ
NC
5
+V
6
IN3
+V
7
IN4
Figure 2. AD8394ACPZ, 24-Lead LFCSP, 4 mm × 5 mm
Rev. Sp0
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved.
AD8394
NOTES
©2007 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D06951F-0-10/07(Sp0)
Rev. Sp0 | Page 2 of 2
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