5.72 GHz to 15.04 GHz Low phase Noise Fractional-N Synthesizer

Overview

The WEA615S55S is a wide band fractional – N frequency synthesizer with on Chip doubler implemented in ST BiCMOS55 process. It uses a 100 MHz to 250 MHz Crystal Input and generates a 5.72 GHz to 15.04 GHz frequency range with the integrated VCOs utilizing a 64 band auto-calibration system. It consists of a an Xtal oscillator, a frequency doubler, a Charge Pump, a low noise phase detector with lock detect indication, 5 bank of VCO, a Prescaler and a 16 to 24 bit MASH 1-1-1. The synthesizer is powered by a 1.2 V and 2.5 V supplies.

Key Features

Low Phase Noise, Low Spur PLL
Low pin count
Reference input: 100 MHz to 250 MHz
Output frequency range: 5.72 GHz to 15.04 GHz with the use of Doubler
PLL Noise floor: -100 dBc/Hz @ 100 MHz offset @ 11.4 GHz
Banerjee figure of merit: -224 dBc/Hz
2nd harmonic: -25 dBc
3rd harmonic: -40 dBc
Lock time: < 2 us
Programmable Charge Pump
Programmable order MASH, 16 to 24 Bit MASH
Programmable Loop Filter
Bank of LC-VCOs with 64 Bands/VCO
Automatic Band Selection System
Low noise phase detector with lock detect indication
RF, Analog Supply 2.5 V
Digital supply 1.2 V
Consumption: 120 mW
Area: 4.6 mm2

Block Diagram

Applications

Technical Specifications

Foundry, Node

STMicro 55nm ST BiCMOS55

Maturity

silicon proven

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