ADF4351BCPZ

Overview

The ADF4351BCPZ is a wideband synthesizer with an integrated voltage-controlled oscillator (VCO) manufactured by Analog Devices Inc. It supports fractional-N and integer-N phase-locked loop (PLL) frequency synthesis, covering an output range from 35 MHz to 4400 MHz. The device operates on a 3.0 V to 3.6 V power supply and features a programmable dual-modulus prescaler of 4/5 or 8/9. Key electrical specifications include a typical jitter of 0.3 ps rms, a charge pump current ranging from 0.312 mA to 5 mA, and RF output power levels between -4 dBm and 5 dBm. Control is managed via a 3-wire serial interface.

Feature Summary

• Integrated VCO with fundamental output frequencies from 2200 MHz to 4400 MHz
• Programmable divide-by-1/-2/-4/-8/-16/-32/-64 output circuits for low-frequency generation
• Fractional-N and integer-N synthesizer modes with cycle slip reduction
• Switched bandwidth fast lock mode and analog/digital lock detect

Applications

• Wireless infrastructure including W-CDMA, TD-SCDMA, WiMAX, GSM, PCS, DCS, and DECT
• Test equipment requiring precise frequency generation
• Wireless LANs and CATV equipment
• Clock generation systems

Procurement Notes

Verify the package type CP-32-7 (LFCSP-32) matches the design footprint. Ensure the exposed pad is connected to ground for thermal management and electrical performance. Confirm that the operating temperature range of -40°C to +85°C meets system requirements. Check for moisture sensitivity as indicated in standard handling guidelines.

Selection Notes

Select this component when a wide tuning range up to 4.4 GHz is required without external VCOs. Consider the 3-wire SPI interface compatibility with the host microcontroller. Evaluate the charge pump current settings against the desired loop filter bandwidth. Ensure the reference input frequency falls within the 10 MHz to 250 MHz specification.

Part Context

The ADF4351BCPZ belongs to the ADF4351 series of wideband PLL frequency synthesizers. It is designed to replace discrete PLL solutions by integrating the VCO, PFD, charge pump, and dividers into a single chip. This integration reduces board space and simplifies the design process for high-frequency applications.

Replacement Considerations

Direct pin-to-pin replacements are not explicitly listed in the provided documentation. Engineers should evaluate other Analog Devices PLL synthesizers based on frequency range and package compatibility.