MAX5862

High-Density Downstream Cable QAM Modulator

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


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Description

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.

Key Features

  • 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

Applications/Uses

  • Edge QAM, CMTS, CCAP, IP-QAM
  • Multi-Dweller Unit Mini-Headends
  • Remote PHY, Coax Media Converters
Part NumberResolution
(bits)
Update Rate
(Msps)
Modulation ModeCapacity RangeCapacity TypeInput InterfaceOutput InterfacefOUT
(MHz)
RF-DACPDISS
(mW)
VSUPPLY
(V)
Footprint
(mm x mm)
Oper. Temp.
(°C)
Package/Pins
@ Max Capacity
MAX5862 144600QAM8, 16, 24, 32FixedCMOSDifferential Analog RF1000Integrated4200
1
1.8
3.3
12 x 170 to +85
FCBGA HYBRID/280
See All Modulators and Digital Upconverters (3)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX5862EVKIT: Evaluation Kit for the MAX5862
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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