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STuW81300：Wide Band Microwave Frac-Integer-N Integrated Synthesizer

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.

Key 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

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