AD9831ASTZ

Overview

The AD9831ASTZ is a Direct Digital Synthesizer (DDS) manufactured by Analog Devices Inc. It operates as a numerically controlled oscillator employing a phase accumulator, a sine look-up table, and a 10-bit D/A converter. The device supports clock frequencies up to 25 MHz and allows for both phase modulation and frequency modulation via a parallel microprocessor interface. It features a 32-bit tuning word width and outputs current from a single DAC. The component is housed in a 48-pin LQFP package and complies with EU hazardous substance restrictions.

Feature Summary

• Integrates a phase accumulator, sine look-up table, and 10-bit D/A converter within a single CMOS chip
• Supports direct digital synthesis with programmable frequency and phase control capabilities
• Interfaces with parallel microprocessor buses for data loading and register configuration

Applications

• Direct Digital Synthesis signal generation
• Frequency modulation applications
• Phase modulation applications

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status and operating temperature range requirements prior to procurement. Ensure the parallel interface voltage levels match the system design constraints.

Selection Notes

Select this component when a parallel interface is required for DDS functionality. Verify that the 25 MHz maximum clock frequency meets the system's output frequency requirements. Check that the 10-bit resolution and current output characteristics align with the downstream analog circuitry needs.

Part Context

The AD9831 is part of the AD983x series of Direct Digital Synthesizers from Analog Devices. It shares architectural similarities with other members like the AD9830 and AD9832 but is distinguished by its specific clock speed limits and interface configurations. This family provides integrated solutions for waveform generation without requiring external discrete components for basic operation.

Replacement Considerations

Check for AD9830 or AD9832 variants if different clock speeds or interface types are needed. Verify pin compatibility and software register maps before substituting.