AD8391AR-REEL7

Overview

The AD8391AR-REEL7 is a dual xDSL line driver amplifier fabricated on the XFCB process. It operates on single supplies from 3 V to 12 V or equivalent dual rails. The device provides high output drive, delivering over 340 mA of current while maintaining low distortion. Key electrical parameters include a 40 MHz bandwidth and a slew rate of 375 V/µs at 12 V supply. Quiescent current is typically 19 mA in full power mode. The unit features a logic-controlled power-down function with standby and shutdown states.

Feature Summary

• Dual parallel amplifiers optimized for low-cost xDSL line driving applications
• High output current capability exceeding 340 mA with low harmonic distortion
• Flexible power management via a single-pin digital control for full power, standby, and shutdown modes
• Compact 8-lead SOIC thermal coastline package designed for efficient heat dissipation

Applications

• VoDSL modems requiring low power consumption
• xDSL USB, PCI, and PCMCIA cards for customer premise equipment
• Line-powered or battery backup xDSL modem systems

Procurement Notes

Verify component status as obsolete before integration into new designs. Confirm that the REEL7 suffix denotes tape and reel packaging compatible with standard surface mount assembly processes. Ensure compatibility with existing PCB footprints for the 8-lead SOIC thermal coastline package. Review absolute maximum ratings regarding supply voltage and internal power dissipation limits during thermal analysis.

Selection Notes

Select this component for applications requiring high-speed signal processing with significant current drive capabilities. The current feedback architecture offers bandwidth stability independent of closed-loop gain settings. Consider the specific supply voltage range when calculating output swing and power dissipation. Evaluate the need for the power-down feature if system-level energy efficiency is a priority.

Part Context

This part belongs to the AD8391 series of dual line drivers manufactured by Analog Devices. It utilizes the proprietary eXtra Fast Complementary Bipolar (XFCB) process to achieve high frequency performance and low noise. The series is specifically engineered for broadband communication interfaces where signal integrity and power efficiency are critical constraints.

Replacement Considerations

The datasheet explicitly marks the AD8391 as obsolete. No direct public substitutes are listed within the provided documentation. Designers must evaluate alternative high-speed dual amplifiers or dedicated line driver ICs that meet the required bandwidth, current drive, and package footprint specifications.