AD8398AACPZ-R7

Overview

The AD8398AACPZ-R7 is a single-port VDSL2 line driver with shutdown, comprising two high-speed voltage feedback operational amplifiers. It delivers an 85 MHz bandwidth and a 600 V/µs slew rate. The device provides a linear peak output current of 450 mA and supports dual ±6 V or single 12 V supplies. It achieves -65 dBc MTPR for Profile 8b at 20.4 dBm and -55 dBc for Profile 17a at 14.5 dBm. Operating from -40°C to +85°C, it features four power modes controlled by PD0 and PD1 pins.

Feature Summary

• Integrated power management via CMOS-compatible control pins enabling full, medium, low, and complete power-down modes.
• High output current capability of 450 mA peak for driving twisted pair lines.
• Exceptional multitone power ratio (MTPR) performance suitable for xDSL applications.
• Thermally enhanced 16-lead LFCSP package with electrically isolated exposed paddle.

Applications

• ADSL2+/VDSL2 CO/CPE line drivers
• PLC line drivers
• Consumer xDSL modems
• Twisted pair line drivers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging type and RoHS compliance status. The R7 suffix indicates reel packaging. Ensure the component source matches Analog Devices specifications. Check for moisture sensitivity levels and storage requirements prior to assembly. Confirm that the thermal pad connection strategy aligns with system design constraints for heat dissipation.

Selection Notes

Select this component for applications requiring high differential output swing and precise linearity in DSL environments. The device is optimized for profiles demanding low distortion at specific output power levels. Consider the available power modes for systems requiring dynamic power consumption management. Evaluate the PCB layout requirements for thermal management and signal integrity due to the high-speed nature of the amplifier.

Part Context

This part belongs to the AD8398 family of specialized amplifiers designed for broadband communication interfaces. It integrates dual op-amps into a single compact package to reduce board space. The series is engineered specifically for the stringent linearity and drive requirements of digital subscriber line technologies.

Replacement Considerations

Public confirmed substitutes include the ISL1539A and OPA2670 from Intersil and Texas Instruments respectively. Verify pin compatibility and electrical parameter alignment before substitution. Note that alternative devices may require different biasing or protection circuitry for lightning fault tolerance.