AD8392AACPZ-R7

Overview

The AD8392A is a quad, low-power, high-output current operational amplifier designed for ADSL/ADSL2+ central office line drivers. It operates on dual supplies from ±5 V to ±12 V or a single supply of 10 V to 24 V. Key electrical parameters include a differential slew rate of 515 V/µs, a small-signal bandwidth of 37 MHz, and a peak output drive current of 500 mA. The device delivers a differential output voltage swing of 42.6 V p-p with second and third harmonic distortions of −93 dBc and −103 dBc respectively at 1 MHz.

Feature Summary

• Four independent current feedback amplifiers optimized for xDSL line driving applications
• Programmable power management with three active bias modes and a shutdown state via digital logic pins
• High output current capability of 500 mA with large differential voltage swing
• Low quiescent current consumption suitable for power-constrained central office environments

Applications

• ADSL/ADSL2+ central office line drivers
• XDSL line driver interfaces
• High-speed analog front-end buffering in telecommunications systems

Procurement Notes

Verify the specific package option required for the design, as the AD8392A is available in both 28-lead TSSOP_EP and 32-lead LFCSP configurations. Confirm that the ordering suffix corresponds to the desired reel quantity and RoHS compliance status. Ensure the selected variant matches the thermal requirements of the target PCB layout, particularly regarding the exposed pad connection for heat dissipation.

Selection Notes

Select the AD8392A when high output current and wide voltage swing are required for driving telephone lines directly. Consider the thermal resistance characteristics of the chosen package, as power dissipation can be significant under full load conditions. Evaluate the need for on-chip common-mode generation, which is available only in the AACP package variant, versus the ARE package which requires external biasing.

Part Context

This component belongs to Analog Devices' family of specialized operational amplifiers tailored for broadband access infrastructure. It addresses the specific demands of DSL systems by integrating high current drive with low power consumption. The device simplifies board design by reducing the need for external power stages while maintaining signal integrity over twisted pair cabling.

Replacement Considerations

Public documentation confirms functional compatibility within the AD8392A series variants (ARE vs. AACP) based on package and common-mode feature availability. No other distinct part numbers are listed as direct substitutes in the provided datasheet. Verify pinout and thermal performance if considering alternative manufacturers for similar xDSL driver applications.

FAQ

How is the power mode of the AD8392A controlled?

The power mode is controlled by two digital logic pins, PD0 and PD1, per amplifier pair. These pins accept 3.3 V or 5 V CMOS logic levels to select between three active bias states or a complete shutdown state.

What is the difference between the AD8392AARE and AD8392AACP packages?

The AD8392AACP includes on-chip common-mode voltage generation pins (VCOM), whereas the AD8392AARE does not. Both packages offer identical electrical performance but differ in pin configuration and thermal packaging options.

Can the AD8392A operate with a single supply?

Yes, the device supports single-supply operation ranging from 10 V to 24 V, in addition to dual-supply operation from ±5 V to ±12 V.