MAX3518ETP+TCHK

Overview

The MAX3518ETP+TCHK is a variable gain amplifier IC designed for DOCSIS 3.0 upstream applications in cable television systems. It operates within the 5 MHz to 204 MHz frequency range and requires a single 5 V supply voltage. The device draws 700 mA of operating current and provides a typical gain of 37.3 dB with a noise figure of 14 dB. It is housed in a 20-TQFN (5x5) surface-mount package and functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Programmable gain control architecture optimized for DOCSIS 3.0 upstream signal processing
• Ultra-low power dissipation capability in transmit-disable mode
• Integrated design supporting compact PCB layouts for cable modem infrastructure

Applications

• DOCSIS 3.0 upstream amplification in cable modems
• Cable Television (CATV) signal conditioning circuits
• RF front-end modules for broadband data transmission

Procurement Notes

Verify the exact suffix TCHK against the manufacturer's official part numbering guide, as it may indicate specific testing or screening levels not present in standard variants. Confirm RoHS compliance status through the latest datasheet revision. Ensure the supplier provides traceability documentation matching Analog Devices specifications. Cross-reference the ordering information with the official Maxim Integrated catalog to avoid counterfeit components.

Selection Notes

Select this component when designing for DOCSIS 3.0 upstream requirements requiring precise gain control and low power consumption. The 20-TQFN package suits space-constrained designs. Evaluate thermal performance given the 700 mA current draw at 5 V. Compare against the MAX3523 for newer DOCSIS 3.1 standards if future-proofing is required. Ensure the 5 MHz to 204 MHz bandwidth aligns with local regulatory spectrum allocations.

Part Context

This device belongs to the MAX3518 family of programmable RF amplifiers from Analog Devices/Maxim Integrated. It serves as a specialized solution for cable operator infrastructure, distinct from general-purpose RF amplifiers. The ETP+ designation indicates a lead-free, halogen-free variant in a TQFN package. The TCHK suffix typically denotes a checked or screened version for high-reliability applications.

Replacement Considerations

The MAX3518ETP+G2Z is a documented alternative variant within the same family. Verify pin compatibility and electrical parameter equivalence before substitution. The MAX3523ETP+T offers higher performance for DOCSIS 3.1 but may require design adjustments.