AD9858BSV

Overview

The AD9858BSV is a Direct Digital Synthesizer (DDS) featuring an integrated 10-bit DAC operating at up to 1 GSPS. It generates frequency-agile analog sine wave outputs up to 400 MHz using a 32-bit programmable frequency register for fine tuning resolution. The device supports external reference clocks up to 2 GHz via a selectable divide-by-2 input divider. It includes an integrated charge pump, phase frequency detector with fast lock circuit, and a 2 GHz analog mixer. Control is facilitated through an 8-bit parallel or SPI serial interface. The component operates on a 3.3 V supply with typical power dissipation of 2 W and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrated high-speed 10-bit DAC capable of 1 GSPS operation for direct digital synthesis.
• Built-in analog mixer supporting RF frequencies up to 2 GHz for frequency translation applications.
• Programmable charge pump and phase frequency detector with fast lock circuitry for PLL integration.
• Flexible control interface supporting both 8-bit parallel data loading and SPI serial protocols.

Applications

• VHF/UHF local oscillator synthesis
• Radar signal generation
• Cellular base station hopping synthesizers
• SONET/SDH clock synthesis

Procurement Notes

Verify the specific suffix 'SV' against the manufacturer's current ordering guide to confirm package type and RoHS compliance status. Confirm availability through authorized distributors as stock levels fluctuate. Ensure the procurement channel provides valid traceability documentation for quality assurance purposes.

Selection Notes

Select this component when a complete DDS solution with integrated mixing and PLL capabilities is required. The 32-bit frequency word allows for precise frequency agility. Consider the 2 GHz internal mixer if frequency translation is needed without external components. Verify that the 10-bit DAC resolution meets the system's dynamic range requirements.

Part Context

The AD9858 belongs to Analog Devices' family of high-performance direct digital synthesizers. It combines a numerically controlled oscillator with a high-speed DAC and additional RF building blocks like a mixer and PFD. This integration reduces board space and simplifies design compared to discrete solutions requiring separate synthesizer and mixer chips.

Replacement Considerations

Publicly documented substitutes include the DS852. Evaluate the DS852 based on its 2.5 GHz clock capability and lower power consumption in single-supply configurations. Compare pin compatibility and register mapping to ensure seamless integration into existing designs.