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× to 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-wire 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, LO frequency synthesis
    Broadband communications