ANALOG DEVICES AD8390A Service Manual
Low Power, High Output Current
VCC
FEATURES
Voltage feedback amplifier
Ideal for ADSL and ADSL2+ central office (CO) and
customer premises equipment (CPE) applications
Enables high current differential applications
Low power operation
Single- or dual-supply operation from 10 V (± 5 V)
up to 24 V (± 12 V)
5.5 mA total quiescent supply current for full power ADSL
and ADSL2+ CO applications
Adjustable supply current to minimize power
consumption
High output voltage and current drive
400 mA peak output drive current
44 V p-p differential output voltage
Low distortion
−70 dBc MTPR, 26 kHz to 1.1 MHz
−65 dBc MTPR, 1.1 MHz to 2.2 MHz
High speed: 260 V/μs differential slew rate
APPLICATIONS
ADSL/ADSL2+ CO and CPE line drivers
xDSL line drivers
High current differential amplifiers
Differential Amplifier
PIN CONFIGURATION
VCOM
NC
NC
NC
14
13
15
16
PIN 1
INDICATOR
1INP
2PD1
AD8390A
3PD0
TOP VIEW
(Not to Scale)
4INN
NC = NO CONNECT
Figure 1. Thermally Enhanced, 4 mm × 4 mm 16-Lead LFCSP
FUNCTIONAL BLOCK DIAGRAM
AD8390A
INP
VCC
VEE
INN
Figure 2.
5
NC
56kΩ
56kΩ
VEE
6
DGND
7
ADJ
I
56kΩ
56kΩ
8
NC
AD8390A
12 OUTN
11 VEE
10 VCC
9OUTP
7094-001
OUTN
VCOM
OUTP
07094-002
GENERAL DESCRIPTION
The AD8390A is a high output current, low power consumption
differential amplifier. It is particularly well suited for the central
office (CO) driver interface in digital subscriber line systems
such as ADSL and ADSL2+. In full bias operation, the driver
delivers 20.4 dBm output power into low resistance loads while
compensating for hybrid and transformer insertion losses and
back termination resistors.
The AD8390A is available in a thermally enhanced LFCSP
package (16-lead LFCSP). Significant control and flexibility
in bias current have been designed into the AD8390A.
For more information about the AD8390A, contact Analog Devices, Inc., at Broadband.products@analog.com.
Rev. SpA
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.
Four power modes are selectable via two digital inputs, PD0 and
PD1, providing three levels of driver bias and one power-down
state. In addition, the I
pin is available for fine quiescent
ADJ
current trimming to tailor the performance of the AD8390A.
The low power consumption, high output current, high output
voltage swing, and robust thermal packaging enable the
AD8390A to be used as the central office line driver in ADSL,
ADSL2+, and proprietary xDSL systems, as well as in other high
current applications requiring a differential amplifier.
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 ©2007–2009 Analog Devices, Inc. All rights reserved.
AD8390A
NOTES
©2007–2009 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D07094-0-1/09(SpA)
Rev. SpA | Page 2 of 2
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