AD9552BCPZ-REEL7

Overview

The AD9552BCPZ-REEL7 is a fractional-N phase-locked loop (PLL) based clock generator designed to replace high-frequency crystal oscillators. It converts low-frequency input references (6.6 MHz to 112.5 MHz) into high-frequency outputs up to 900 MHz using an on-chip VCO and sigma-delta modulator. The device operates on a single 3.3 V supply with power consumption under 400 mW. It features pin-programmable frequency ratios or arbitrary settings via a 3-wire SPI interface. Outputs support LVPECL, LVDS, and CMOS logic levels, delivering RMS jitter below 0.5 ps in the -40°C to +85°C industrial temperature range.

Feature Summary

• Fractional-N PLL architecture with integrated sigma-delta modulator for precise frequency synthesis
• On-chip voltage-controlled oscillator (VCO) operating between 3350 MHz and 4050 MHz
• Dual complementary outputs (OUT1, OUT2) compatible with LVPECL, LVDS, or CMOS standards
• Flexible input options including crystal resonators (XTAL pins) or single-ended clock signals (REF pin)
• 3-wire SPI programming interface for custom frequency ratios and register configuration

Applications

• SONET/SDH (including FEC), 10 Gb Ethernet, Fibre Channel, and DRFI/DOCSIS systems
• High-definition video frequency translation
• Wireless infrastructure equipment
• Test and measurement instruments including handheld devices
• Cost-effective replacement for high-frequency VCXO, OCXO, and SAW resonators

Procurement Notes

Verify that the REEL7 suffix corresponds to tape-and-reel packaging as specified in the manufacturer's ordering guide. Confirm the BCPZ designation matches the 32-lead LFCSP package with exposed die pad requirements. Ensure the component meets RoHS compliance standards and verify the specific revision level against current Analog Devices documentation prior to integration.

Selection Notes

Select this component when a low-jitter (<0.5 ps RMS) solution is required to replace physical high-frequency resonators. Choose the AD9552 for applications needing flexible frequency translation from standard reference clocks (e.g., 19.44 MHz) to higher speeds up to 900 MHz. Consider the pin-programmable presets for simplified hardware design or use the SPI interface for dynamic frequency adjustments. Ensure the external loop filter capacitor is selected according to the datasheet recommendations for stability.

Part Context

The AD9552 belongs to Analog Devices' family of precision clock translators and generators. It serves as a direct functional replacement for traditional high-frequency crystal oscillators, offering greater flexibility through programmable frequency multiplication. The device integrates the VCO and modulation circuitry, reducing the need for external components compared to discrete PLL solutions.

Replacement Considerations

When replacing existing oscillators, ensure the new design accommodates the external loop filter capacitor and decoupling capacitors for the LDO pins. Verify that the output termination (AC or DC coupled) matches the downstream device requirements for LVPECL or LVDS modes. Check thermal performance as the device dissipates up to 400 mW.