AD8390A_16 Datasheet, PDF (1/13 Pages) Analog Devices – Low Power, High Output Current Differential Amplifier

Data Sheet
Low Power, High Output Current
Differential Amplifier
AD8390A
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
FUNCTIONAL BLOCK DIAGRAM
VCC
INP
AD8390A
VCC
56kΩ
56kΩ
OUTN
VCOM
56kΩ
VEE
56kΩ
OUTP
INN
VEE
Figure 1.
APPLICATIONS
ADSL/ADSL2+ CO and CPE line drivers
xDSL line drivers
High current differential amplifiers
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.
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 IADJ pin is available for fine quiescent
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.
Rev. C
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