GENERAL DESCRIPTION
The AD9853 integrates a high speed direct-digital synthesizer (DDS), a high performance, high speed digital-to-analog converter (DAC), digital filters and other DSP functions onto a single chip, to form a complete and flexible digital modulator device. The AD9853 is intended to function as a modulator in network applications such as interactive HFC, WLAN and MMDS, where cost, size, power dissipation, functional integration and dynamic performance are critical attributes.

FEATURES
    Universal Low Cost Solution for HFC Network
    Return-Channel TX Function: 5 MHz–42 MHz/5 MHz–65 MHz
    165 MHz Internal Reference Clock Capability
    Includes Programmable Pulse-Shaping FIR Filters and Programmable Interpolating Filters
    FSK/QPSK/DQPSK/16-QAM/D16-QAM Modulation Formats
    6x Internal Reference Clock Multiplier
    Integrated Reed-Solomon FEC Function
    Programmable Randomizer/Preamble Function
    Supports Interoperable Cable Modem Standards
    Internal SINx/x Compensation
    >50 dB SFDR @ 42 MHz Output Frequency (Single Tone)
    Controlled Burst Mode Operation
    +3.3 V to +5 V Single Supply Operation
    Low Power: 750 mW @ Full Clock Speed (3.3 V Supply)
    Space Saving Surface Mount Packaging

APPLICATIONS
    HFC Data, Telephony and Video Modems
    Wireless LAN