GENERAL DESCRIPTION
The AD9857 integrates a high-speed direct-digital synthesizer (DDS), a high-performance, high-speed 14-bit digital-to-analog converter (DAC), clock multiplier circuitry, digital filters, and other DSP functions onto a single chip, to form a complete quadrature digital upconverter device. The AD9857 is intended to function as a universal I/Q modulator and agile upconverter, single-tone DDS, or interpolating DAC for communications applications, where cost, size, power dissipation, and dynamic performance are critical attributes.

FEATURES
    200 MHz Internal Clock Rate
    14-Bit Data Path
    Excellent Dynamic Performance 80 dB SFDR @ 65 MHz (
100 kHz) AOUT
    4–20 Programmable Reference Clock Multiplier
    Reference Clock Multiplier PLL Lock Detect Indicator
    Internal 32-Bit Quadrature DDS
    FSK Capability
    8-Bit Output Amplitude Control
    Single-Pin Power-Down Function
    Four Programmable, Pin-Selectable Signal “Profiles”
    SIN(x)/x Correction (Inverse SINC Function)
    Simplified Control Interface 10 MHz Serial, 2- or 3-Wire SPI-Compatible
    3.3 V Single Supply
    Single-Ended or Differential Input Reference Clock
    80-Lead LQFP Surface-Mount Packaging
    Three Modes of Operation Quadrature Modulator Mode Single-Tone Mode Interpolating DAC Mode

APPLICATIONS
    HFC Data, Telephony, and Video Modems
    Wireless Base Station
    Agile, L.O. Frequency Synthesis
    Broadband Communications