AD9951 IC Chip

AD9951 （400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesize）

Introduction

The AD9951 is a direct digital synthesizer (DDS) featuring a 14-bit DAC operating up to 400 MSPS. The AD9951 uses advanced DDS technology, coupled with an internal high speed, high performance DAC to form a digitally programmable,complete high frequency synthesizer capable of generating a frequency-agile analog output sinusoidal waveform at up to 200 MHz. The device is designed to provide fast frequency hopping and fine tuning resolution (32-bit frequency tuning word). The frequency tuning and control words are loaded into the AD9951 via a serial I/O port.

The AD9951 is specified to operate over the extended industrial temperature range of -40°C to +105°C.

Features

• 400 MSPS internal clock speed
• Integrated 14-bit digital-to-analog converter (DAC)
• 32-bit tuning word
• Phase noise≤-120 dBc/Hz at 1 kHz offset (DAC output)
• Excellent dynamic performance>80 dB SFDR at 160 MHz (+100 kHz offset) Aout
• Serial input/output (I/O) control
• 1.8 V power supply
• Software and hardware controlled power down
• 48-lead TQFP/EP package
• Phase-locked loop (PLL) REFCLK multiplier (4x to 20x)
• Internal oscillator; can be driven by a single crystal
• Phase modulation capability
• Multichip synchronization

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