MAX5862

NOT RECOMMENDED FOR NEW DESIGNS

High-Density Downstream Cable QAM Modulator

Low Power, Fully Integrated, Symbols-to-QAM RF Solution: 131mW/QAM in 12mm x 17mm BGA

Data Sheet (Rev. 0) Product Selection Table
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Overview

  • Integrated Downstream Cable QAM Modulator
    • High-Density: 8, 16, 24, or 32 QAM Channels
    • 14-Bit 4.6Gsps RF-DAC
    • DOCSIS 3.0 DRFI Compliant
  • Highly Flexible and Configurable
    • RRC Filters Support ITU-T J.83 Annex A, B, and C
    • 1MHz to 8MHz Channel Bandwidth
    • Full Carrier Agility within Each of Four 192MHz Blocks
      • Block Agility within 950MHz Output Bandwidth
    • Reconfigurable Without Service Interruption
    • Input Symbol Rate: 1Msym/s to 7.14Msym/s
      • Independently Set for Each Channel
    • Integrated QAM Mapper (16/32/64/128/256-QAM)
      • Supports All ITU-T J.83-Defined Constellations
    • CMOS Input Port Supports Up to 1024-QAM
  • Additional Features Ease RF Design
    • Programmable Digital Predistortion
    • High DAC Output Power 9dBm (CW) Eliminates Pre-amp
  • Low Power, Compact Solution
    • 4.2W at 32 (6MHz) QAMs, fS = 4.6Gsps
    • 12mm x 17mm, 280-Ball FCBGA

The MAX5862 is an integrated, high-density, downstream cable QAM modulator, digital upconverter (DUC) and RF digital-to-analog converter (RF-DAC). The device performs QAM mapping, pulse shaping and digital RF upconversion of forward-error-correction (FEC) encoded data with full agility and drives a single RF-port using a 14-bit 4.6Gsps DAC. The device digitally synthesizes RF signals with up to 32 DOCSIS-compliant 6MHz QAM or 8MHz QAM channels. The device has fixed QAM capacity and provides high-density QAM modulation with very low power dissipation (4.2W at 32 QAMs) in a compact 12mm x 17mm footprint.

The device accepts FEC-encoded CMOS data (symbols) on a single 10-bit input port that accepts up to 32 time-interleaved digital data streams. Each channel features an individually configurable QAM mapper, RRC filter, and arbitrary rate resampler (ARR). The device performs pulse shaping, resampling, interpolation and quadrature modulation of input data, supporting all data rates defined in DOCSIS 3.0 and DVB-C. A cascade of interpolation filters, complex modulators, and channel combiners allow modulation of the signal to any frequency from 47MHz to 1006MHz. Integrated direct digital frequency synthesizers allow positioning of the QAM channels with a resolution of 125Hz. The interpolation filters and resamplers provide linear phase and excellent gain flatness. Output data from the last modulator is fed to a digital-predistortion (DPD) block that can be used to correct distortion in the device’s integrated RF-DAC and output amplifiers external to the device.

Applications

  • Edge QAM, CMTS, CCAP, IP-QAM
  • Multi-Dweller Unit Mini-Headends
  • Remote PHY, Coax Media Converters
MAX5862
High-Density Downstream Cable QAM Modulator
MAX5862 Simplified Block Diagram
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Documentation

Data Sheet 1

Reliability Data 1

Application Note 1

Design Note 1

Technical Articles 2

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Digital to Analog Converters (DACs) 1
MAX5860
NOT RECOMMENDED FOR NEW DESIGNS Scalable High-Density Downstream Cable QAM Modulator
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Tools & Simulations

Software Development 1

Evaluation Kits

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schematic 1
MAX5862EVKIT

Evaluation Kit for the MAX5862

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Features and Benefits

  • Evaluates the Two MAX5862s Up to 32 QAM Channels Each
  • Single 5.5V Input Voltage Supply
  • Maximum 4.6Gsps Update Rate
  • Direct Interface with Maxim HSDCEP Data Source Board Using QSH Connectors (Order HSDCEP)
  • Windows XP-, Windows Vista-, and Windows 7-Compatible Software
  • On-Board SPI Interface Control for Both Ports of the MAX5862
  • On-Board SMBus Interface Control for Both Ports of the MAX6642 Temperature Sensor
  • GUI Controls for HSDCEP Operation
  • Pseudorandom Bit Sequence (PRBS) Test Pattern Files
  • Proven 14-Layer PCB Design
  • Fully Assembled and Tested

Product Details

The MAX5862 evaluation kit (EV kit) contains two MAX5862 high-density downstream cable QAM modulators that each integrate a digital upconverter (DUC) and an RF digital-to-analog converter (RF-DAC). The device’s DUC performs QAM mapping, pulse shaping, and digital RF upconversion of FEC-encoded data with full agility and then drives a 14-bit, 4.6Gsps RF-DAC. Each device digitally synthesizes RF signals with up to 32 DOCSIS®-compliant 6MHz or 8MHz QAM channels on a single RF port at frequencies from 47MHz to 1006MHz.
The EV kit provides a complete two-port system solution for high-density QAM modulation with very low power dissipation.
The EV kit includes Windows XP®-, Windows Vista®-, and Windows 7-compatible software that provides a simple graphical user interface (GUI) for configuration of all of the MAX5862 registers, control of the SPI interface, temperature monitoring, and for control of the high-speed data converter evaluation platform (HSDCEP) board. Software to control the MAX5862 registers and SPI is also Windows 7 compatible.
The EV kit provides two QSH Samtec connectors to interface to the HSDCEP for driving the IC’s single input port and various control signals.

Applications

  • Edge QAM, CMTS, CCAP, IP-QAM
  • Multi-Dweller Unit Mini-Headends
  • Remote PHY, Coax Media Converters
MAX5862EVKIT
Evaluation Kit for the MAX5862
MAX5862EVKIT: Board Photo

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