Analog Devices AD9954 Product Info

• 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 
• 1.8 V power supply
• Software and hardware controlled power-down 
• 48-lead TQFP Integrated 1024 word × 32-bit RAM 
• PLL-based REFCLK multiplier 
• Internal oscillator, can be driven by a single crystal
• Phase modulation capability 
• Multichip synchronization

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.

Applications

• Agile LO frequency synthesis
• Programmable clock generators
• FM chirp source for radar and scanning systems
• Automotive radars
• Test and measurement equipment
• Acousto-optic device drivers