AD9834CRUZ

Overview

The AD9834CRUZ is a low-power Direct Digital Synthesis (DDS) device capable of generating high-performance sine and triangular waveforms. It features an on-board comparator for square wave generation, supporting output frequencies up to 37.5 MHz with a master clock rate of 75 MHz. The device operates on a 2.3 V to 5.5 V power supply and consumes only 20 mW at 3 V. It includes two 28-bit frequency registers and two 12-bit phase registers, providing frequency resolution down to 0.004 Hz at a 1 MHz clock rate. The part utilizes a 3-wire SPI interface and offers independent analog and digital power supplies.

Feature Summary

• Integrated 10-bit current-steering DAC with differential outputs for sine and triangular waveforms
• On-board comparator for generating square wave clock signals from filtered sinusoidal outputs
• Supports frequency and phase modulation via software control or dedicated select pins
• Independent analog and digital power domains allowing mixed-voltage operation

Applications

• Frequency stimulus and waveform generation systems
• Low power RF and communications equipment
• Liquid and gas flow measurement instrumentation
• Proximity, motion, and defect detection sensory applications
• Test and medical equipment requiring precise signal synthesis

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm temperature grade and package variant. Ensure that any assumed functional differences based solely on suffix characters are validated by the datasheet, as suffixes typically denote environmental ratings or packaging rather than electrical performance changes.

Selection Notes

Select this component when a low-power DDS solution is required for generating precise sine, triangle, or square waves. Consider the 28-bit frequency resolution and narrow-band SFDR specifications for applications demanding high spectral purity. Verify compatibility with the system's available clock sources and serial interface constraints before integration.

Part Context

The AD9834 is part of Analog Devices' family of complete DDS devices designed for low-power applications. It shares architectural similarities with other members like the AD9833 and AD9837 but offers specific performance characteristics tailored for cost-sensitive and power-constrained environments. The CRUZ suffix indicates a specific commercial grade and TSSOP package configuration within this product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the verified source material. Users should consult the manufacturer's official documentation for cross-reference information or alternative recommendations.