AD9850BRSZ

Overview

The AD9850BRSZ is a complete Direct Digital Synthesis (DDS) frequency synthesizer manufactured by Analog Devices Inc. It integrates a high-speed 125 MHz clock rate, a 10-bit DAC, and a comparator within a 28-lead SSOP package. The device operates on a single 3.3 V or 5 V supply, consuming 155 mW at 3.3 V and 380 mW at 5 V. It features a 32-bit frequency tuning word for precise control and supports both parallel byte and serial loading formats. The output frequency can reach up to half the reference clock frequency (62.5 MHz), with an asynchronous update rate of up to 23 million frequencies per second.

Feature Summary

• Integrates a high-performance 10-bit DAC and a high-speed comparator for direct analog and square wave outputs.
• Provides digitally controlled phase modulation capability with increments of 180°, 90°, 45°, 22.5°, and 11.25°.
• Supports simplified control interfaces via either parallel byte loading or a 40-bit serial data stream.
• Includes a power-down function to minimize energy consumption when the device is not in active use.

Applications

• Frequency and phase agile sine wave synthesis
• Clock recovery and locking circuitry for digital communications
• Digitally controlled ADC encode generator
• Agile local oscillator applications

Procurement Notes

Verify that the component matches the RS-28 shrink small outline package specification. Confirm the operating temperature range aligns with industrial requirements of -40°C to +85°C. Ensure the part is sourced as a lead-free variant, indicated by the 'Z' suffix in the model number. Check datasheet revisions for any updates to timing characteristics or absolute maximum ratings before integration.

Selection Notes

Select this component when a highly integrated DDS solution is required for generating spectrally pure sine waves or agile clock signals. Consider the 32-bit tuning word resolution for applications demanding fine frequency steps. Evaluate the power dissipation limits against the available thermal management capabilities of the PCB layout. Verify compatibility with the system's reference clock frequency and voltage levels.

Part Context

The AD9850BRSZ belongs to the AD9850 series of complete DDS synthesizers from Analog Devices. It utilizes advanced CMOS technology to achieve high performance in a compact form factor. The device is designed for applications requiring precise frequency and phase control, leveraging a proprietary algorithm for efficient phase-to-amplitude conversion.

Replacement Considerations

The AD9850BRSZ-REEL is the reel-packaged version of the same component. No other cross-model substitutes are documented in the provided source material.