Catalog
CMOS 200 MSPS 14-Bit Quadrature Digital Upconverter
Key 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
Description
AI
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.APPLICATIONSHFC data, telephony, and video modemsWireless base stationAgile, LO frequency synthesisBroadband communications
