MAX3507

Upstream CATV Amplifier


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Description

The MAX3507 is a variable-gain power amplifier for use in CATV upstream transmitters. The variable-gain feature has 55dB of dynamic range and is controlled by a 3-wire SPI™ bus. The device is capable of generating +64dBmV output (16QAM/QPSK) when driven with a +34dBmV nominal input signal. The on-chip anti-alias lowpass filter with 75MHz cutoff frequency saves system design cost and space. The optional positive slope generator provides system design flexibility.

The device operates from a single +5V supply and draws 220mA nominal during transmit at max gain (100% duty cycle). For burst-type transmissions, the device is shut off between bursts to minimize noise and save power while still maintaining a match at the output. The device is optimized for high linearity with harmonic levels below -55dBc.

The MAX3507 is available in a 28-pin QFN package and operates over the extended industrial temperature range (-40°C to +85°C).
MAX3507: Typical Operating Circuit MAX3507: Typical Operating Circuit Enlarge+

Key Features

  • Built-In 5th-Order Elliptic Anti-Aliasing Filter
  • 5MHz to 65MHz Operation
  • 55dB Gain Control Range
  • Optional Positive Slope Generator
  • 55dB Spurious-Free Dynamic Range Over Transmit Band

Applications/Uses

  • Cable Modem Upstream Transmitter
  • Set-Top Box Upstream Transmitter
  • Telephony-Over-Cable

Technical Documents

Tutorial 5100 General Layout Guidelines for RF and Mixed-Signal PCBs
Tutorial 2866 Converting S-Parameters from 50Ω to 75Ω Impedance

Quality and Environmental Data

Request Reliability Report for: MAX3507 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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