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

AD9857属于RF/IF，射频/中频和 RFID > RF 其它 IC 和模块。亚德诺半导体技术有限公司制造生产的AD9857RF 其它 IC 和模块RF 其它 IC 和模块产品系列包含各种独特、专门或特定用途的产品，可与 RF、IF 和微波无线电应用结合使用。示例包括 AM/FM 调谐器和接收器、偏置网络、基带处理器、计数器、数字可调电容器、下变频器、倍频器、移相器、前置分频器、端接器、上变频器、VCO 等。