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Features

? Output frequency range: 1.925 GHz to 16 GHz

– RF out 1 (VCO, VCO÷2): 1.925-8.0 GHz

– RF out 2 (VCO x 2): 7.7-16.0 GHz

? Very low noise

– Normalized phase noise floor: -227 dBc/Hz

– VCO phase noise (6.0 GHz): -131 dBc/Hz

@ 1 MHz offset

– Noise floor (6.0 GHz): -158 dBc/Hz

– Phase noise (12 GHz): -125 dBc/Hz

@ 1 MHz offset

– Noise floor (12 GHz): -154 dBc/Hz

? Integrated VCOs with fast automatic center

frequency calibration

? External VCO option with 5 V charge pump

? Fundamental VCO rejection at doubler output

higher than 20 dB

? Internally broadband matched RF outputs

delivering +6 dBm @6 GHz and +4 dBm

@12 GHz single-ended

? Integrated low noise LDOs

? Maximum phase detector frequency: 100 MHz

? Exact frequency mode

? Differential reference clock input (LVDS and

LVECPL compliant) supporting up to 800 MHz

? Integrated reference crystal oscillator core

? R/W SPI interface

? Logic compatibility/tolerance 1.8 V/3.3 V

? Supply voltage: 3.0 V to 5.4 V

? Small size exposed pad VFQFPN36 package

6x6x1.0 mm

? Process: BICMOS 0.25 μm SiGe

Applications

? Infrastructure equipment

? Satellite communications for terrestrial

applications

? Other wireless communication systems

Description

The STuW81300 includes a dual architecture

frequency synthesizer (Fractional-N and Integer-

N), four low phase noise VCOs with a fast

automatic center frequency calibration providing a

very wide frequency range, from 1.925 GHz to

16 GHz, with a single device.

The STuW81300 optimizes size and cost of the

final application by the integration of low noise

LDO voltage regulators and internally matched

broadband RF outputs.

Additional features include a crystal oscillator

core, external VCO mode, output mute function

and low power mode to trade current

consumption with phase noise performance

and/or output level.