AD9954YSVZ-REEL7

Overview

The AD9954 is a direct digital synthesizer (DDS) featuring an internal 14-bit DAC and a 400 MSPS clock speed. It generates frequency-agile analog output sinusoidal waveforms up to 160 MHz with 32-bit frequency tuning accuracy and 14-bit phase tuning accuracy. The device includes an integrated 1024-word by 32-bit RAM for flexible frequency sweeping, a PLL-based REFCLK multiplier, and an ultrahigh-speed analog comparator. It operates on a 1.8 V power supply and supports software and hardware controlled power-down modes.

Feature Summary

• Integrated 14-bit DAC with programmable phase and amplitude dithering capabilities
• Built-in static RAM supporting automatic linear and nonlinear frequency sweeping modes
• Ultrahigh-speed analog comparator providing square wave output functionality
• PLL-based reference clock multiplier allowing system clock generation from low-frequency sources

Applications

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

Procurement Notes

Verify the specific ordering suffix REEL7 indicates reel packaging when sourcing components. Confirm that the DVDD_I/O voltage requirements match the target system interface levels. Ensure the operating temperature range aligns with the extended industrial specifications defined in the datasheet. Validate pin compatibility with the intended PCB layout before finalizing procurement decisions.

Selection Notes

Select this component for applications requiring high-resolution frequency agility and precise phase control. Consider the 1.8 V logic requirement for the CLKMODESELECT pin versus the 3.3 V compatible I/O port. Evaluate the need for the internal oscillator against external clock stability requirements. Assess power consumption constraints across different operational modes including single-tone and sweep configurations.

Part Context

The AD9954 belongs to Analog Devices' AgileRF family of direct digital synthesizers. It utilizes advanced DDS technology combined with a high-performance internal DAC to form a complete digitally programmable high-frequency synthesizer. This integration allows for fast frequency hopping coupled with fine tuning of both frequency and phase parameters.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.