CMOS 200 MSPS 14-Bit Quadrature Digital Upconverter

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.

The AD9857 offers enhanced performance over the industry-standard AD9856, as well as providing additional features.

The AD9857 is available in a space-saving, surface-mount package and is specified to operate over the extended industrial temperature range of −40°C to +85°C.

APPLICATIONS

* HFC data, telephony, and video modems

* Wireless base station

* Agile, LO frequency synthesis

* Broadband communications

* 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