MAX5861
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MAX5861

DOCSIS 3.1 High-Density SCQAM and OFDM Downstream Cable Modulator

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Low Power, Fully Integrated, Symbols to RF Solution: 7mW/MHz in a 12mm X 18mm BGA

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 1
1ku List Price
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Features
  • High-Density Cable Downstream Modulator
    • Combine Up to Six 192MHz Blocks of 32 x 6MHz SCQAM Channels and DOCSIS 3.1 OFDM Channels
    • Integrated 14-Bit 4.9152Gsps RF-DAC
  • Highly Flexible and Configurable
    • ITU-T J.83 Annex A, B, and C SCQAM Channels
    • IFFT Processing D3.1 OFDM Channels
    • LVDS or SSTL 1.2/1.5 DDR Data Ports
    • One 10-Bit SCQAM Port with 160-Channel Capacity
    • Two 9-Bit OFDM Ports with 6 OFDM-Channel Capacity
    • Channel Bandwidths:
    • 1MHz to 8MHz SCQAM
    • 24MHz/48MHz/96MHz/192MHz OFDM
    • 192MHz IFFT Bypass Mode
    • Full SCQAM Agility within 192MHz Block
    • Block Agility within 1218MHz Output Bandwidth
  • Additional Features Ease RF Design
    • Programmable Digital Predistortion
    • High Output Power: 9dBm (Peak CW)
  • Low-Power, Compact Solution
    • 5.9W with 128 SCQAMs + 2 OFDM Channels
    • Operating Temperature Range TA = -40°C to TJ = +110°C
    • 12mm x 18mm, 308-Ball LFBGA
Additional Details
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The MAX5861 is an integrated, high-density, SCQAM and OFDM downstream cable modulator, digital up-converter (DUC) and RF digital-to-analog converter (RF-DAC). The MAX5861 is DOCSIS 3.1-compliant and is optimized for converged cable access platform (CCAP) hardware. The MAX5861 performs baseband I/Q symbols to RF up-conversion to digitally synthesize a selectable combination of SCQAM and OFDM blocks on a single RF port. A combination of up to six 192MHz blocks of SCQAM or OFDM channels can be powered on at any one time, where a block is defined as either 32 X 6MHz (or 24 X 8MHz) SCQAM channels or an OFDM channel (up to 192MHz wide). The MAX5861 features three differential time-multiplexed input data ports that support LVDS or SSTL 1.2/1.5 in DDR mode.

The MAX5861 SCQAM input port A accepts 10-bit Forward Error Correction (FEC)-encoded data for up to 160 (6MHz) individually programmable channels. The SCQAM path performs QAM mapping, root raised cosine (RRC) pulse shaping, and resampling, compliant with ITU-T J.83 Annex A, B, and C. This port also supports 1024-QAM with the use of an offset bias bit. Up to four channels can be operated in RRC filter bypass mode at up to 2.5Msym/s for legacy communications to older generation devices.

Each of two available 9-bit OFDM ports, B or C, support up to three 12-bit OFDM IFFT-processing channels. Each IFFT-processing channel supports OFDM blocks of up to 192MHz bandwidth with selectable 4k or 8k subcarriers and up to 4096-QAM modulation options. Each of the two OFDM ports also allow bypassing of the IFFT processing with a single 18-bit I/Q data path to support user-defined modulation at up to 192MHz bandwidth.

A cascade of interpolation filters, complex modulators, channel combiners and Direct Digital Frequency Synthesizers (DDFS) up-convert the SCQAM and/or OFDM signals with full frequency agility from 43MHz to 1218MHz. The up-converted spectrum is fed to a Digital Pre-Distortion (DPD) block to compensate for distortion performance limitations in the DAC and external output amplifiers.

Applications

  • CCAP, Edge QAM, CMTS
  • DOCSIS 3.0/3.1 and DVB-C/C2
  • Multi-Dweller Units (MDU), Mini-Headends
  • Remote PHY, Coax Media Converters
Part Models 1
1ku List Price
price unavailable

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX5861TEXA+
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Software & Part Ecosystem

Software & Part Ecosystem

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Evaluation Kit

Evaluation Kits 1

MAX5861EVKIT

Evaluation Kit for the MAX5861

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MAX5861EVKIT

Evaluation Kit for the MAX5861

Evaluation Kit for the MAX5861

Features and Benefits

  • Evaluates Up to 160 SCQAM Channels and/or 6 OFDM Channels
  • Up to 6 Blocks Powered at Once, Where a Block is Defined as an OFDM Channel or a 32-Channel SCQAM Block
  • Single 5.0V Input Voltage Supply
  • Maximum 4.9152Gsps Update Rate
  • Direct Interface with Xilinx® VC707 Data Source Board if Desired
  • Windows XP-, Windows Vista-, and Windows 7/8-Compatible Software
  • On-Board SPI Interface Control for the MAX5861
  • On-Board SMBus Interface Control for the MAX6654 Temperature Sensor
  • GUI Controls for VC707 Operation
  • Pseudo Random Bit Sequence (PRBS) Test Pattern Files
  • Proven 10-Layer PCB Design
  • Fully Assembled and Tested

Product Detail

The MAX5861 evaluation kit (EV kit) contains a MAX5861 high-density downstream cable SCQAM and OFDM modulator that integrates a digital up-converter (DUC) and a RF Digital to Analog Converter (RF-DAC). The MAX5861 DUC performs SCQAM and OFDM mapping, pulse shaping, and digital RF up-conversion with full agility and then drives a 14-bit 5Gsps RF-DAC. The device digitally synthesizes RF signals with up to 160 DOCSIS® - compliant 6MHz QAM channels (or up to 120 8MHz QAM channels) on a single RF port at frequencies from 47MHz to 1218MHz. The MAX5861 device provides up to 6 channels of OFDM IFFT processing. Each of the OFDM channels provide up to 192MHz of bandwidth, for a combined potential 1152MHz of modulation bandwidth. The MAX5861 can support up to six blocks powered on at the same time, where a block is defined as an OFDM channel or a 32-channel SCQAM block. The MAX5861 EV kit provides a complete system solution for high-density SCQAM and OFDM modulation targeting the DOCSIS 3.1 solution with very low power dissipation.

The MAX5861 EV kit connects to the FMC connector on the Xilinx VC707 evaluation kit, allowing the VC707 to communicate with the MAX5861’s three input ports and various control signals.

The EV kit includes Windows XP®-, Windows Vista®-, Windows® 7/8-compatible software that provides a simple graphical user interface (GUI) for configuration of all of the MAX5861 registers, control of SPI interface, control of the VC707 FPGA and temperature monitoring.

Applications

  • CCAP, Edge QAM, CMTS
  • DOCSIS 3.0/3.1 and DVB-C/C2
  • Multi-Dweller Units (MDU), Mini-Headends
  • Remote PHY, Coax Media Converters

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