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Multi-band RF Synthesizers

Combining high performance, high integration, wideband and multi-band capabilities, ST's RF synthesizers represent a robust and effective alternative to discrete, expensive and bulky PLL and VCO solutions. Reducing RF BOM and footprint by up to 60% while increasing reliability, these synthesizers are a perfect fit for high-performance applications such as GSM/3G/LTE base stations, microwave links, cable modems, satellite, broadcasting, instrumentation, security, defense and test equipment.

A single STW81200 Wide Band RF Synthesizer is able to cover frequencies from 46.875 MHz to 6 GHz. With low noise VCOs and an integer and fractional-N PLL architecture for supporting multi-standard SDR applications, the STW81200 also integrates internally broadband matched RF outputs and supports an external crystal oscillator to further reduce the number of external components. The STW81200’s flexible power supply options ensure the best tradeoff between performance and consumption.

Key benefits:

  • High performance:
    • Normalized in-band phase noise floor:-227 dBc/Hz
    • VCO phase noise: -135 dBc/Hz @ 1 MHz offset, 4.0 GHz carrier
    • Noise floor: -160 dBc/Hz
  • High level of integration (cost savings on BOM)
  • High degree of flexibility and wideband coverage from 46.875 MHz to 6 GHz with a single device for a wide range of applications.

ST’s STW8110 Multi-Band RF synthesizer is a cost-effective family of integrated multi-band RF integer-N frequency synthesizers. Widely adopted for professional applications such as wireless base station and other wireless infrastructure equipment, the STW8110x family has proven its robustness over the years.

Each component of the STW8110 family includes an integer-N frequency synthesizer and two fully integrated VCOs which feature low phase noise and a noise floor of -154 dBc/Hz. The combination of wide frequency range VCOs and multiple output options (direct output, divided by two, or divided by four) allows these synthesizers to show multi-band features and frequency coverage up to 5 GHz.

Key benefits:

  • Robust and cost-effective
  • High level of integration
  • Wideband coverage (up to 5 GHz)
  • Excellent Integer-N PLL phase noise

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