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MAX5855 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX5855
Description  16-Bit, 4.9Gsps Wideband Interpolating and Modulating RF DAC with JESD204B Interface
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX5855 Datasheet(HTML) 1 Page - Maxim Integrated Products

 
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General Description
The MAX5855 high-performance, interpolating and modu-
lating, 16-bit, 4.9Gsps RF DAC can directly synthesize up
to 1000MHz of instantaneous bandwidth from DC to fre-
quencies greater than 2.45GHz. The device is optimized
for cable access and digital video broadcast applications
and meets spectral emission requirements for a broad
set of radio transmitters and modulators including DOC-
SIS 3.1/3.0, DVB-C/C2, DVB-T2, DVB-S2X, ISDB-T, and
EPoC.
The device integrates interpolation filters, a digital quadra-
ture modulator, a numerically controlled oscillator (NCO),
clock multiplying PLL + VCO and a 14-bit RF DAC core.
The 4x linear phase interpolation filter simplifies recon-
struction filtering, while enhancing passband dynamic per-
formance, and reducing the input data bandwidth required
from an FPGA. The NCO allows for fully agile modulation
of the input baseband signal for direct RF synthesis.
The MAX5855 input interface accepts 16-bit input data by
way of a five-lane, JESD204B SerDes data input inter-
face that is Subclass-0 compliant and operates at a data
rate of 9.8304Gbps.
The MAX5855 clock input has a flexible interface that ac-
cepts a differential sine-wave or square-wave reference
input clock signal at 245.75MHz, 491.52MHz, or
983.04MHz. A clock multiplying PLL and VCO is used to
internally generate the 4.9152GHz sampling clock from
the reference clock. The device provides a divided refer-
ence clock output to ensure synchronization between the
data source and the DAC.
The integrated RF DAC uses a differential current-steering
architecture that includes a differential 50Ω internal termi-
nation and can produce a 3dBm full-scale output signal
level on a 50Ω external load. Operating from 1.0V and
1.8V power supplies, the device consumes 2.7W at
4.9Gsps. The device is offered in a compact 144-pin,
10mm x 10mm, FCCSP package and is specified for the
extended industrial temperature range (-40°C to +85°C).
Applications
● DOCSIS 3.1/3.0 Remote PHY and CCAP
● Digital Video Broadcast Modulators
• DVB-C/C2/DVB-T2/DVB-S2X/ISDB-T
● Ethernet PON Over Coax (EPoC)
● Point-to-Point Wireless
● Instrumentation
Benefits and Features
● Simplifies RF Design and Enables New
Communication Architectures
• Eliminates I/Q Imbalance and LO Feedthrough
• Enables Multi-Band RF Modulation
● Direct RF Synthesis of 1GHz Bandwidth
• 4.9152Gsps DAC Output Update Rate
• High-Performance 14-Bit RF DAC Core
• Digital Baseband I/Q with 4x Interpolation
• Digital Quadrature Modulator + NCO for Full Agility
• Sub-1Hz NCO Resolution
• Integrated Clock Multiplying PLL + VCO
● Flexible and Configurable
• 5-Lane JESD204B Input Data Interface
• Subclass-0 Compliant
• 9.8304Gbps Per Lane
• Divided Reference Clock Output
• SPI Interface for Device Configuration
Ordering Information appears at end of data sheet.
Click here for production status of specific part numbers.
MAX5855
16-Bit, 4.9Gsps Wideband Interpolating
and Modulating RF DAC with JESD204B
Interface
EVALUATION KIT AVAILABLE
19-100312; Rev 0; 9/2018


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