AD8018ARU-REEL7

Overview

The AD8018ARU-REEL7 is a dual high-speed current feedback amplifier designed for xDSL line driving applications. It operates on a single supply voltage ranging from 3.3 V to 8 V, with typical operation at 5 V. The device delivers a slew rate of 300 V/µs and a bandwidth of 130 MHz at unity gain. Each channel provides a linear output current of 400 mA into a differential load while maintaining rail-to-rail output swing within 0.5 V of the supply rails. Key performance metrics include an input offset voltage of 1 mV, a supply current of 9 mA per amplifier in full power mode, and low noise density of 4.5 nV/√Hz.

Feature Summary

• Rail-to-rail output capability with high current drive suitable for transformer-coupled lines
• Integrated digital logic controls for full power, standby, and shutdown modes
• Low distortion performance optimized for xDSL upstream transmission
• Compact 14-lead TSSOP package with dedicated power-down pins

Applications

• xDSL USB, PCI, and PCMCIA cards
• Consumer DSL modems
• Twisted pair line drivers
• Customer premise equipment (CPE) for ADSL, SDSL, and VDSL systems

Procurement Notes

Verify the specific ordering suffix REEL7 corresponds to the 14-lead TSSOP package configuration as defined in the manufacturer's ordering guide. Confirm that the component meets the required temperature range of -40°C to +85°C for the intended application environment. Ensure compatibility with the PCB footprint for the RU-14 package type during procurement planning.

Selection Notes

Select this component when high output current and low distortion are critical for driving twisted-pair lines from a single 5 V supply. The dual-channel architecture allows for differential signaling without requiring external phase inversion circuits. Consider the thermal dissipation limits of the TSSOP package if operating near maximum supply voltages or delivering high line power levels.

Part Context

This part belongs to the AD8018 family of special purpose amplifiers manufactured by Analog Devices. It is specifically engineered as a line driver for xDSL applications, distinguishing it from general-purpose operational amplifiers by its optimized current feedback architecture and integrated power management features. The device complements other Analog Devices signal chain components used in broadband access networks.

Replacement Considerations

The AD8018ARZ serves as a pin-compatible alternative offering the same electrical specifications but housed in an 8-lead SOIC package. Designers must account for the difference in pin count and physical dimensions when substituting between the TSSOP and SOIC variants. No other direct functional substitutes are documented in the provided datasheet.