AD8394AREZ

Overview

The AD8394AREZ is a quad operational amplifier and dual-channel ADSL/ADSL2+ line driver featuring four current feedback amplifiers. It supports dual-supply operation from ±6 V to ±12 V or single-supply operation from 12 V to 24 V. The device delivers high output voltage and current drive with a slew rate of 300 V/μs and low distortion, achieving an MTPR down to −70 dBc. Internal power dissipation is 700 mW while driving a 20.4 dBm ADSL2+ signal with a crest factor of 5.5.

Feature Summary

• Four high-output-current current feedback amplifiers integrated into a single package
• Three active power modes plus shutdown for optimized power consumption
• Low leakage current in shutdown mode controlled by digital inputs
• High speed performance with 300 V/μs slew rate and low distortion

Applications

• ADSL/ADSL2+ central office line drivers
• xDSL line drivers
• DAC output buffers
• Medical instrumentation
• High peak current circuits

Procurement Notes

Verify component status as the datasheet indicates this part is obsolete. Confirm availability through authorized distributors or secondary market sources. Ensure compatibility with existing PCB footprints for the 20-lead TSSOP_EP package. Check for moisture sensitivity levels and storage requirements before installation. Validate that replacement components meet the original electrical specifications for ADSL applications.

Selection Notes

Select the AD8394AREZ when designing ADSL/ADSL2+ central office interfaces requiring high output current and low distortion. Choose this part over the LFCSP variant if surface-mount technology constraints favor the 20-lead TSSOP_EP package. Consider the selectable bias modes for power management needs. Ensure the supply voltage range matches the system requirement of 12 V to 24 V single supply or ±6 V to ±12 V dual supply.

Part Context

The AD8394 belongs to Analog Devices' specialized amplifier family designed for broadband communication systems. It integrates four amplifiers to serve as a complete line driver solution, reducing board space compared to discrete designs. The AREZ suffix denotes the 20-lead thermally enhanced TSSOP_EP package, distinguishing it from the LFCSP option.

Replacement Considerations

No public confirmed substitutes are listed in the provided documentation. As the part is marked obsolete, engineering teams must evaluate alternative line drivers or quad op-amps with similar current feedback architectures. Verify pinout compatibility and thermal performance if selecting a different package type.