Analog Devices Inc. ADF4350BCPZ

ADF4350BCPZ Wideband Frequency Synthesizer

The ADF4350BCPZ from Analog Devices is a high-performance wideband synthesizer with an integrated voltage controlled oscillator (VCO) that provides frequency generation from 137.5 MHz to 4.4 GHz, making it one of the most versatile phase-locked loop (PLL) solutions available in the industry. Housed in a compact 32-lead LFCSP package, this fully integrated PLL frequency synthesizer combines an advanced fractional-N/integer-N PLL with a high-resolution 32-bit modulus to deliver exceptional frequency agility and spectral purity. Operating from a 3.0 V to 3.6 V supply, the device features programmable output power levels and low phase noise characteristics, making it ideal for wireless infrastructure, test equipment, satellite communications, and military systems where precise frequency synthesis and low jitter performance are critical requirements.

Key Features and Applications

This integrated synthesizer features a fully integrated VCO with a fundamental frequency range from 2.2 GHz to 4.4 GHz, along with RF output dividers that enable generation of frequencies as low as 137.5 MHz. The device incorporates a high-resolution 32-bit modulus fractional-N/integer-N PLL that provides fine frequency resolution down to less than 1 Hz, along with a phase frequency detector (PFD) operating up to 32 MHz. Key specifications include excellent phase noise of -219 dBc/Hz normalized phase noise floor and typical SSB phase noise of -103 dBc/Hz at 100 kHz offset for a 2.1 GHz carrier. The ADF4350BCPZ also features programmable output power control (-4 dBm to +5 dBm), 3.3 V logic compatibility, and a sophisticated power-saving mode that reduces current consumption to 0.5 mA during standby operation.

The ADF4350BCPZ is extensively used in wireless infrastructure equipment including cellular base stations, microwave backhaul systems, and point-to-point radio links requiring stable local oscillator generation. It serves critical roles in test and measurement instruments such as spectrum analyzers, signal generators, and wireless testers where precise frequency synthesis is essential for accurate measurements. The synthesizer is employed in satellite communication systems, military radios, radar systems, and aerospace electronics where its wide frequency range and stability meet stringent requirements. Additional applications include industrial sensors, medical imaging equipment, and scientific instruments that demand reliable high-frequency generation with low phase noise and excellent spectral purity.

Alternative RF Synthesizer IC Models

● LMX2594RHAT (Texas Instruments): A wideband 20 GHz PLLatinum RF synthesizer with integrated VCO offering ultra-low phase noise for high-performance applications.

● HMC703LP4E (Analog Devices): A fractional-N PLL synthesizer operating up to 3 GHz with integrated VCO and excellent phase noise performance.

● MAX2870ETJ+ (Maxim Integrated): A 6 GHz fractional/integer-N synthesizer with VCO and integrated regulators for wideband frequency synthesis.

● ADF4351BCPZ (Analog Devices): An enhanced version with extended frequency range up to 4.4 GHz and improved phase noise characteristics.