Provides PLL performance factor of -234dBc/Hz, -100dBc typ spurious

Analog Devices announced the launch of a new advanced synthesizer, the ADF4371, which integrates a phase-locked loop (PLL), voltage controlled oscillator (VCO), low dropout (LDO) regulator, and tracking filter technology.

The new products can be used in RF/microwave system designs that require stringent accuracy performance in next-generation designs across a wide range of fields, including aerospace, defense, instrumentation, communications infrastructure, and high-speed converter clocking.

The newly announced ADI ADF4371 offers the widest continuous RF output range from 62 MHz to 32 GHz. The new products lead the way in performance and adaptability with low PLL performance coefficients (-234dBc/Hz), low spurious (-100dBc typ.), low VCO phase noise (-134dBc/Hz @ 1MHz offset at 8GHz), and built-in tracking filter technology.

Because of its rich feature set and highly configurable architecture, designers can now have a single, ultra-compact synthesizer solution to address virtually any LO/clock requirement over a wide frequency range, reducing development costs, risk and time to market.

The ADF4371 can be used with an external loop filter and an external reference source to easily implement a high-resolution 39-bit fractional-N or integer-N PLL frequency synthesizer.

The wideband microwave VCO allows generation of a wide range of frequencies from 62.5 MHz to 32 GHz.

The new products offer the industry's lowest jitter (36 fs at 10 GHz) and reference spurious (-100 dBc typ.) characteristics and are capable of operating up to 105°C without loss of lock.

The ADF4371 integrates power supply decoupling, LDOs, and harmonic tracking filters for applications requiring a very compact footprint.

This tracking filter technology provides at least 30 dB of harmonic and sub-harmonic rejection across the entire VCO range.

This allows for a significant reduction in the overall solution footprint, especially when fixed-range filters must be used to achieve this level of rejection performance over octave bandwidths.

Additionally, for applications that do not require the full frequency range support capability of the ADF4371 (up to 32 GHz), ADI offers up to ADF4372, which operates up to 16GHz, is also available.

Key features of ADF4371 product
1. Extremely low FOM (typical phase noise floor): -234dBc/Hz
2. High phase frequency detection (PFD) performance up to 250MHz
Extremely low integrated phase noise (jitter) of less than 36 fs at 3.10 GHz
4. Extremely low reference spur, typically less than 100dBc
5.IBS(integer boundary spurs): -90dBc@960kHz offset when it is an integer channel.
6. Built-in harmonic filter