AD9956YCPZ

Overview

The AD9956YCPZ is a high-performance AgileRF synthesizer integrating a Direct Digital Synthesis (DDS) core and Phase-Locked Loop (PLL) circuitry. It features a 14-bit DAC operating at up to 400 MSPS with a 48-bit frequency tuning word for fine resolution. The device includes an RF divider supporting inputs up to 2.7 GHz, a programmable charge pump, and a 655 MHz CML-mode PECL-compliant driver. It operates on a 1.8 V analog/digital supply and a 3.3 V I/O supply, housed in a 48-lead LFCSP package.

Feature Summary

• Integrates DDS and PLL circuitry for digitally programmable frequency synthesis
• Supports automatic linear frequency sweeping capability within the DDS core
• Includes eight phase/frequency profiles accessible via profile select pins
• Features software-controlled power-down modes for individual functional blocks

Applications

• Agile LO frequency synthesis
• FM chirp source for radar and scanning systems
• Automotive radars
• Test and measurement equipment
• Acousto-optic device drivers

Procurement Notes

Verify the component against the official Analog Devices datasheet Rev. B specifications. Confirm the 48-lead LFCSP package type and ensure compatibility with the required 1.8 V and 3.3 V supply voltages. Check for moisture sensitivity handling requirements during assembly. Validate that the serial I/O interface matches the system design constraints.

Selection Notes

Select this component when high-resolution frequency agility and low phase noise are required. Ensure the external VCO supports the target output frequencies up to 2.7 GHz. Verify that the system can accommodate the 48-bit frequency tuning word for precise step sizes. Consider the thermal performance of the LFCSP package if operating near the upper temperature limits.

Part Context

The AD9956 belongs to Analog Devices' AgileRF synthesizer family, designed for applications requiring fast frequency hopping and fine tuning resolution. It combines advanced DDS technology with a high-speed internal DAC and an advanced phase frequency detector/charge pump combination. This integration allows for the generation of digitally programmable, frequency-agile analog output sinusoidal waveforms.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.