AD9831ASTZ-REEL

Overview

The AD9831ASTZ-REEL is a Direct Digital Synthesizer (DDS) manufactured by Analog Devices Inc. It functions as a numerically controlled oscillator utilizing a phase accumulator, a sine look-up table, and a 10-bit D/A converter. The device supports parallel digital interfaces and operates with clock frequencies up to 25 MHz. It features a 32-bit tuning word width for frequency control and provides a single current output 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 for direct digital synthesis.
• Supports both phase modulation and frequency modulation operations.
• Features a parallel digital interface for data transfer.

Applications

• Evaluation board integration via the EVAL-AD9831EB platform.
• PC-controlled signal generation using parallel port interfacing.
• Frequency sweep applications through software-programmed stepping.

Procurement Notes

Verify that the REEL suffix indicates tape-and-reel packaging rather than tray packaging when sourcing components. Confirm the specific lot date code and ensure the part matches the 48-pin LQFP physical dimensions. Cross-reference the manufacturer's official documentation to validate the active status and compliance with environmental standards before finalizing procurement orders.

Selection Notes

Select this component when a DDS solution requiring a parallel interface is necessary. Ensure the system design accommodates the 48-pin LQFP footprint and provides appropriate power supply decoupling for AVDD and DVDD. Verify that the host controller can manage the required parallel data transfers and logic levels compatible with the AD9831 specifications.

Part Context

The AD9831 is a Direct Digital Synthesizer designed for precise frequency and phase control. The ASTZ variant denotes a lead-free, RoHS-compliant version packaged in a 48-pin LQFP. The REEL suffix specifies the manufacturing packaging format, distinguishing it from tray-packaged equivalents while maintaining identical electrical characteristics and pinout configurations.

Replacement Considerations

Consult Analog Devices documentation for verified substitute part numbers within the AD983x family or alternative DDS devices. Ensure any replacement maintains compatibility with the 48-pin LQFP package and supports the required 25 MHz clock frequency and 10-bit resolution specifications.