AD9954 IC Chip

AD9954（400 MSPS, 14-Bit, 1.8 V CMOS,Direct Digital Synthesizer）

Introduction

The AD9954 is a direct digital synthesizer (DDS) that uses advanced technology, coupled with an internal high speed, high performance DAC to form a complete, digitally programmable,high frequency synthesizer capable of generating a frequency-agile analog output sinusoidal waveform at up to 160 MHz.The AD9954 enables fast frequency hopping coupled with fine tuning of both frequency (0.01 Hz or better) and phase (0.022° granularity). 

The AD9954 is programmed via a high speed serial I/O port.The device includes static RAM to support flexible frequency sweep capability in several modes, plus a user-defined linear sweep mode of operation. Also included is an on-chip high speed comparator for applications requiring a square wave output. An on-chip oscillator and PLL circuitry provide users with multiple approaches to generate the device’s system clock.

The AD9954 is specified to operate over the extended industrial temperature range.

Features

• 400 MSPS internal clock speed
• Integrated 14-bit DAC
• Programmable phase/amplitude dithering
• 32-bit frequency tuning accuracy
• 14-bit phase tuning accuracy
• Phase noise better than -120 dBc/Hz
• Excellent dynamic performance
  –>80 dB narrowband SFDR
• Serial input/output (I/O) control
• Ultrahigh speed analog comparator
• Automatic linear and nonlinear frequency sweeping
• 4 frequency/phase offset profiles
• 1.8V power supply
• Software and hardware controlled power- down
• 48-lead TQFP
• Integrated 1024 word x 32-bit RAM
• PLL-based REFCLK multiplier
• Internal oscillator, can be driven by a single crystal
• Phase modulation capability
• Multichip synchronization

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