MAX3518ETP+CHK

Overview

The MAX3518ETP+CHK is a specialized variant of the MAX3518 integrated CATV upstream amplifier IC, designed to meet DOCSIS 3.0 requirements. It operates on a single +5V supply and features a 20-pin, 5mm x 5mm thin QFN package. The device supports an input frequency range of 5MHz to 85MHz with a 3dB bandwidth of 275MHz. It utilizes a SPI 3-wire interface for gain control across a 63dB range with 1dB steps. The component includes four power modes to optimize performance versus current consumption, ensuring low transient voltages during burst operations.

Feature Summary

• Integrated design for DOCSIS 3.0 compliant cable modem applications
• SPI-controlled variable gain amplifier with differential I/O ports
• Four programmable power codes for optimized efficiency and distortion management
• Low transient voltage characteristics during burst enable/disable cycles

Applications

• DOCSIS 3.0 cable modems
• Set-top boxes
• VoIP modems

Procurement Notes

Verify that the CHK suffix denotes specific factory testing or binning parameters distinct from the standard MAX3518ETP+. Confirm RoHS compliance status and lead times directly with Analog Devices or authorized distributors, as availability may vary. Ensure the ordering information matches the exact electrical specifications required for your DOCSIS 3.0 implementation.

Selection Notes

Select this component when designing systems requiring integrated CATV upstream amplification with strict power constraints. The MAX3518 offers a compact footprint and simplified external circuitry by integrating most functions on-chip. Consider the available power modes if thermal management or battery life is critical. Verify compatibility with existing SPI control logic and ensure the 5V supply rail meets the device's operating requirements.

Part Context

The MAX3518 belongs to Maxim Integrated's portfolio of RF amplifiers acquired by Analog Devices. It addresses the growing demand for high-speed data transmission over hybrid fiber-coaxial networks. The device simplifies board layout by reducing the need for external components, relying primarily on a balun and capacitors. Its integration supports the transition to DOCSIS 3.0 standards, enabling higher throughput in residential and commercial broadband infrastructure.

Replacement Considerations

Publicly confirmed substitute part numbers include MAX3518ETP+, MAX3518ETP+T, and MAX3518ETP+TG2Z. These variants share identical core functionality but may differ in packaging format (tube vs. reel) or specific manufacturing lot codes. Verify pinout and electrical parameters before substitution.