Analog Devices Inc. introduced a phased-locked loop (PLL) synthesizer with integrated voltage-controlled oscillator (VCO) that allows mobile network operators to improve cellular base station performance and the quality of wireless service. The new ADF4355 PLL with VCO synthesizer operates up to 6.8 GHz, a frequency band that allows significant margin to industry's current carrier frequencies. When designed into cellular base stations, the new PLL synthesizer's higher frequency and lower VCO phase noise enables wireless service providers to increase call throughput and cell phone coverage and service more users per base station at no significant additional cost. The device's higher frequency band offers similar throughput advances for makers of point-to-point/point-to-multipoint microwave links, satellite/VSAT systems, industrial and test and measurement systems as well as other wireless equipment.
In frequency generation applications for wireless and industrial applications, where VCO phase-noise performance plays a pivotal role in determining the overall system performance of the RF signal transmission and receive, the choice of PLL synthesizer for the RF local oscillator (LO) is a key system design consideration. ADI's
Control of all on-chip registers is through a simple 3-wire interface. The
ADF4355 Wideband, Ultra-Low-Noise Synthesizer Key Features:
- 54-MHz to 6.8-GHz continuous frequency range
Ultra-low VCO phase noise: -144dBc/Hz @ 1MHz offset at 1.7GHz (typical)
- High-resolution 38-bit modulus
- Operates from -40C to +85C without re-programming.
- Dual differential outputs
- Supported by ADIsimPLL circuit design and virtual evaluation software
- Integrated rms jitter: ~150fs