آر اف (فرکانس رادیویی) و بی‌سیم سایر آی سی‌ و ماژول‌های آر اف

Product Attributes

Introduction

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 industrystandard 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.

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 sp|∞-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