ADF4350

The ADF4350 from Analog Devices is a versatile wideband frequency synthesizer featuring an integrated Voltage Controlled Oscillator (VCO). This component is designed for fractional-N or integer-N phase-locked loop (PLL) frequency synthesizer implementations when used with an external loop filter and reference frequency.

Key electrical specifications include an impressive output frequency range spanning from 137.5 MHz to 4400 MHz. The integrated VCO has a fundamental output frequency between 2200 MHz and 4400 MHz, with divide-by circuits allowing generation of lower RF output frequencies. It boasts low phase noise and a typical RMS jitter of 0.5 ps. The device operates from a power supply range of 3.0 V to 3.6 V and supports 1.8 V logic compatibility.

Additional features include a programmable dual-modulus prescaler (4/5 or 8/9), programmable output power, an RF output mute function controllable via pin or software, and an auxiliary RF output. Control is managed through a simple 3-wire serial interface. Analog and digital lock detect capabilities are also integrated, along with a switched bandwidth fast-lock mode and cycle slip reduction.

Applications for the ADF4350 are diverse, including wireless infrastructure (W-CDMA, TD-SCDMA, WiMAX, GSM, PCS, DCS, DECT), test equipment, wireless LANs, CATV equipment, and general clock generation.