AD9850BRS-REEL

Overview

The AD9850BRS-REEL is a complete Direct Digital Synthesis (DDS) frequency synthesizer manufactured by Analog Devices Inc. It integrates a high-speed 10-bit DAC, a comparator, and a 32-bit phase accumulator within a 28-lead SSOP package. The device supports a maximum reference clock of 125 MHz at 5 V or 110 MHz at 3.3 V, enabling output frequencies up to 62.5 MHz with a resolution of 0.0291 Hz. It operates over an extended industrial temperature range of -40°C to +85°C and consumes 155 mW at 3.3 V/110 MHz or 380 mW at 5 V/125 MHz.

Feature Summary

• Integrates a 32-bit frequency tuning word for precise digital frequency control
• Includes a high-performance 10-bit DAC and a high-speed comparator for analog and square wave outputs
• Supports simplified parallel byte or serial loading formats for data input
• Provides five bits of digitally controlled phase modulation capability

Applications

• Frequency/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 the REEL suffix indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm that the specific revision matches current manufacturing standards as datasheets may undergo updates. Ensure compatibility with standard surface-mount assembly processes for the SSOP-28 footprint.

Selection Notes

Select this component for applications requiring high-resolution frequency agility and low power consumption. Evaluate the 3.3 V versus 5 V supply requirements based on system voltage levels and power dissipation limits. Consider the 125 MHz clock rate limit when designing reference clock circuits to ensure optimal spectral purity and dynamic range performance.

Part Context

This part belongs to the AD9850 series of CMOS DDS synthesizers from Analog Devices. It represents a highly integrated solution combining digital synthesis cores with analog conversion stages. The RS-28 package option provides a compact form factor suitable for space-constrained electronic designs requiring programmable signal generation capabilities.

Replacement Considerations

The AD9850BRSZ serves as a lead-free equivalent variant within the same package and specification profile. Verify pinout compatibility and electrical parameters before substituting between reel and tube packaging options.