●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.
●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
