ISL1557IRZ

Telecom Overview

The ISL1557IRZ is a dual operational amplifier designed for VDSL2 and ADSL line driving in DMT-based solutions. It features a high drive capability of 750mA while consuming only 6mA of supply current per amplifier, operating from a single 4.5V to 12V supply or ±2.25V to ±6V dual supply. The device achieves -80dBc typical distortion at 150kHz into a 25Ω load. It includes enhanced output protection against lightning transients and control pins C0 and C1 for bias adjustment. The component operates over the full industrial temperature range of -40°C to +85°C.

Telecom Feature Summary

• Enhanced output clamps provide stronger protection against lightning transients
• Dual control pins (C0 and C1) allow adjustable bias and enable/disable functions
• Current feedback architecture ensures stable bandwidth across varying temperatures

Telecom Applications

• VDSL2 line drivers
• ADSL2+ CPE line driving
• G.SHDSL and HDSL2 line drivers

Telecom Procurement Notes

Verify the specific ordering suffix IRZ to confirm the package type and temperature rating. Ensure the procurement source provides official Renesas documentation to validate RoHS compliance and Pb-free status. Cross-reference the datasheet revision FN6568 Rev 3.00 to ensure accurate electrical specifications are applied during integration.

Telecom Selection Notes

Select this component for applications requiring high differential output drive into low impedance loads like 21Ω. Verify that the required bandwidth aligns with the feedback resistor selection, as the current feedback topology dictates performance. Confirm that the thermal pad connection to VS- is properly implemented on the PCB layout to manage power dissipation effectively.

Telecom Part Context

The ISL1557A series serves as a specialized line driver within the Renesas portfolio, targeting DSL infrastructure. The IRZ suffix specifically denotes the 16-lead QFN package variant. This model complements other line drivers by offering enhanced transient protection suitable for outdoor or harsh environment deployments common in telecommunications equipment.

Telecom Replacement Considerations

ISL1557AIRZ-T7: Tape and reel version of the same component.