EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX5861 DOCSIS 3.1 High-Density SCQAM and OFDM Downstream Cable Modulator General Description Benefits and Features The MAX5861 is an integrated, high-density, SCQAM and High-Density Cable Downstream Modulator OFDM downstream cable modulator, digital up-converter Combine Up to Six 192MHz Blocks of 32 x 6MHz (DUC) and RF digital-to-analog converter (RF-DAC). The SCQAM Channels and DOCSIS 3.1 OFDM Channels Integrated 14-Bit 4.9152Gsps RF-DAC MAX5861 is DOCSIS 3.1-compliant and is optimized for converged cable access platform (CCAP) hardware. The Highly Flexible and Configurable MAX5861 performs baseband I/Q symbols to RF up- ITU-T J.83 Annex A, B, and C SCQAM Channels conversion to digitally synthesize a selectable combina- IFFT Processing D3.1 OFDM Channels tion of SCQAM and OFDM blocks on a single RF port. LVDS or SSTL 1.2/1.5 DDR Data Ports A combination of up to six 192MHz blocks of SCQAM One 10-Bit SCQAM Port with 160-Channel Capacity or OFDM channels can be powered on at any one time, Two 9-Bit OFDM Ports with 6 OFDM-Channel where a block is defined as either 32 X 6MHz (or 24 X Capacity 8MHz) SCQAM channels or an OFDM channel (up to Channel Bandwidths: 192MHz wide). The MAX5861 features three differential 1MHz to 8MHz SCQAM time-multiplexed input data ports that support LVDS or 24MHz/48MHz/96MHz/192MHz OFDM SSTL 1.2/1.5 in DDR mode. 192MHz IFFT Bypass Mode Full SCQAM Agility within 192MHz Block The MAX5861 SCQAM input port A accepts 10-bit Block Agility within 1218MHz Output Bandwidth Forward Error Correction (FEC)-encoded data for up to 160 (6MHz) individually programmable channels. The Additional Features Ease RF Design SCQAM path performs QAM mapping, root raised cosine Programmable Digital Predistortion (RRC) pulse shaping, and resampling, compliant with High Output Power: 9dBm (Peak CW) ITU-T J.83 Annex A, B, and C. This port also supports Low-Power, Compact Solution 1024-QAM with the use of an offset bias bit. Up to four 5.9W with 128 SCQAMs + 2 OFDM Channels channels can be operated in RRC filter bypass mode Operating Temperature Range T = -40C to A at up to 2.5Msym/s for legacy communications to older T = +110C J generation devices. 12mm x 18mm, 308-Ball LFBGA Each of two available 9-bit OFDM ports, B or C, support Applications up to three 12-bit OFDM IFFT-processing channels. Each DOCSIS 3.0/3.1 and DVB-C/C2 IFFT-processing channel supports OFDM blocks of up to 192MHz bandwidth with selectable 4k or 8k subcarriers CCAP, Edge QAM, CMTS and up to 4096-QAM modulation options. Each of the two Remote PHY, Coax Media Converters OFDM ports also allow bypassing of the IFFT processing Multi-Dweller Units (MDU), Mini-Headends 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 modula- tors, channel combiners and Direct Digital Frequency Synthesizers (DDFS) up-convert the SCQAM and/or Simplified Block Diagram OFDM signals with full frequency agility from 43MHz to 1218MHz. The up-converted spectrum is fed to a Digital 160-CHANNEL A SCQAM Pre-Distortion (DPD) block to compensate for distortion QAM MODULATOR RF DAC PORT 5 x 192MHz 14-BIT, 5Gsps performance limitations in the DAC and external output RF 1.2GHz BW OUT amplifiers. B,C OFDM MODULATOR OFDM +9dBm POUT 6 x 192MHz PORTS Ordering Information appears at end of data sheet. 19-7576 Rev 2 8/18 COMBINER MODULATOR, DPDMAX5861 DOCSIS 3.1 High-Density SCQAM and OFDM Downstream Cable Modulator TABLE OF CONTENTS General Description ............................................................................ 1 Benefits and Features .......................................................................... 1 Applications .................................................................................. 1 Simplified Block Diagram........................................................................ 1 Absolute Maximum Ratings ...................................................................... 8 Package Information ........................................................................... 8 308 LFBGA . 8 Electrical Characteristics ........................................................................ 9 Typical Operating Characteristics ................................................................ 16 Pin Configuration ............................................................................. 22 Pin Description ............................................................................... 23 Detailed Description........................................................................... 34 Differential I/O Description 35 SCQAM Modulation and Up-Conversion Description 35 Symbol Interface Description 35 Port A Input Timing . 37 Handshaking 38 Port Clock 38 PSYNC and Sync Counter 38 Input Timing Diagram 38 Configurable Input Parity . 39 Output Training Pattern 39 Channel FIFO Operation . 40 SCQAM DSP Path 40 Octal Channel Combiner (48MHz Block) . 41 Block Combiners and Digital Up-Conversion . 42 QAM Mapper 42 Spectral Inversion of Channel Data . 44 RRC Filter 44 RRC Filter Bypass Mode . 44 Arbitrary Rate Resampler 46 Modulators 46 Power Adjustment and Power Probes . 46 Maxim Integrated 2 www.maximintegrated.com