AD8018ARZ-REEL7

Overview

The AD8018ARZ-REEL7 is a dual high-speed current feedback amplifier designed for xDSL line driving applications. It operates on a single supply ranging from 3.3 V to 8 V, with typical operation at 5 V. The device delivers a large signal bandwidth of 130 MHz and a slew rate of 300 V/µs. Each channel provides a linear output current of 400 mA into a differential load while maintaining low distortion characteristics, including an out-of-band SFDR of –82 dBc. The quiescent supply current is typically 9 mA per amplifier.

Feature Summary

• Rail-to-rail output voltage swing capability
• High output current drive of 400 mA
• Low noise performance with 4.5 nV/√Hz density
• Digital standby and shutdown control modes

Applications

• xDSL USB, PCI, and PCMCIA cards
• Consumer DSL modems
• Twisted pair line drivers

Procurement Notes

Verify the specific REEL7 suffix indicates tape-and-reel packaging when sourcing components. Confirm that the logic input thresholds align with the system's digital interface levels. Ensure power supply decoupling meets the requirements for stable operation in high-speed environments.

Selection Notes

Select this component for designs requiring high output current and rail-to-rail output on a single supply. Consider the thermal dissipation limits when operating near maximum supply voltages. Evaluate the trade-off between bandwidth and stability based on the chosen feedback resistor values.

Part Context

This part belongs to the AD8018 family of specialized amplifiers manufactured by Analog Devices Inc. It is fabricated using the XFCB process to achieve high speed and low power consumption. The device is available in 8-lead SOIC and 14-lead TSSOP packages.

Replacement Considerations

Direct functional replacements are not explicitly confirmed in public documentation. Verify pin compatibility and electrical specifications against alternative high-speed current feedback amplifiers if substitution is required.

FAQ

How does the AD8018 handle power-down states?

The device features two logic bits (PWDN1 and PWDN0) that allow selection between full power, standby, and shutdown modes, reducing supply current significantly in lower power states.

What is the recommended supply voltage for optimal ADSL performance?

A well-regulated 5 V supply is recommended to optimize upstream drive capability and maintain the best Spurious Free Dynamic Range (SFDR).