AD9856AST

Overview

The AD9856AST is a CMOS quadrature digital upconverter integrating a high-speed direct digital synthesizer (DDS) and a 12-bit digital-to-analog converter (DAC). It operates within a frequency range of 5 MHz to 200 MHz. The device features a single channel with serial interface connectivity. It functions on a 3 V power supply and operates between -40°C and +85°C. The component is housed in a 48-lead LQFP surface-mount package.

Feature Summary

• Integrates a high-speed direct digital synthesizer for precise frequency generation
• Includes a high-performance 12-bit digital-to-analog converter for signal output
• Supports quadrature modulation capabilities for RF applications

Applications

• HFC cable network systems
• RF upconversion modules
• Wireless communication infrastructure

Procurement Notes

Verify the specific suffix 'AST' against the manufacturer's current product status, as availability may vary. Confirm that the 48-LQFP package dimensions match the target PCB footprint. Ensure the serial interface protocol aligns with the host controller specifications before finalizing integration plans.

Selection Notes

Select this component when a combined DDS and DAC solution is required for frequencies up to 200 MHz. The integrated architecture reduces external component count compared to discrete solutions. Verify that the 12-bit resolution meets the system's dynamic range requirements and that the serial interface timing constraints are satisfied by the design.

Part Context

This part belongs to the AD9856 series of quadrature digital upconverters. It is designed for applications requiring compact, high-frequency signal generation. The AST variant specifies the operating temperature range and packaging type within the broader family of CMOS DDS devices offered by Analog Devices.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's official obsolescence notices or cross-reference guides for potential alternatives if this specific revision is discontinued.