MAX3518ETP+T

Overview

The MAX3518ETP+T is a DOCSIS 3.0 compliant CATV upstream amplifier IC operating from a single +5V supply. It covers an input frequency range of 5MHz to 85MHz with a 275MHz, 3dB bandwidth. The device provides 63dB of programmable gain control in 1dB steps via a SPI interface. It supports four QPSK modulated carriers at +58dBmV simultaneously or a single carrier at +64dBmV. Power consumption is 1.25W at 31dB gain and drops to 25mW in transmit-disable mode.

Feature Summary

• Integrated differential Class A output stage designed for superior even-order distortion performance
• Programmable power codes allow bias current reduction based on specific linearity requirements
• Low transient voltage during burst on/off transitions to meet DOCSIS system specifications
• On-chip resistors provide nominal 75Ω output impedance matching

Applications

• DOCSIS 3.0 Cable Modems
• VOIP Modems
• Set-Top Boxes

Procurement Notes

Verify the component matches the exact part number MAX3518ETP+T. Confirm the package type is 20-pin TQFN-EP and the temperature range is -40°C to +85°C. Ensure the ordering suffix indicates lead-free and RoHS compliance. Check that the supplier documentation references the correct datasheet revision for accurate electrical characteristics.

Selection Notes

Select this component for applications requiring integrated DOCSIS 3.0 upstream amplification. The device requires an external balun at the output port to convert the differential signal to single-ended. Designers must account for the 200Ω differential input impedance when designing the preceding anti-alias filter circuitry.

Part Context

The MAX3518 is manufactured by Analog Devices Inc./Maxim Integrated. It utilizes SiGe BiCMOS technology. The device is housed in a 20-pin thin QFN package measuring 5mm x 5mm. It operates within an extended industrial temperature range.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.