RF Synthesizers

The Si413x RF Synthesizers perform IF and dual-band, low-noise RF frequency synthesis for wireless personal communications applications.
The Si413x ICs address the price-sensitive, low-power, high-performance requirements for personal wireless communications by substantially reducing external passive component count, eliminating external VCOs and varactor diodes, improving power efficiency and isolating, in silicon, unwanted external interference. The stable, low-phase noise characteristics are achieved through a proprietary self-tuning architecture that does not require external adjustments or laser trimming for component-tolerance matching.
 
 

Features

  • Dual RF and single IF frequency synthesizer
  • RF1 VCO range 900 to 1800 MHz
  • RF2 VCO range 750 to 1500 MHz
  • IF output range 62.5 to 1000 MHz
  • Dual synthesizer and single synthesizer derivatives available
  • Fully integrated VCOs
  • Programmable loop filters
 
 

Applications

Product Matrix
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Part NumberDatasheetPackage TypeTemperature RangeDescription
Si4112-D-GM
Buy
Sample
QFN28-40 to 85 °CIF OUT
Si4112-D-GT
Buy
Sample
TSSOP24-40 to 85 °CIF OUT
Si4113-D-GM
Buy
Sample
QFN28-40 to 85 °CRF1/RF2 OUT
Si4113-D-GT
Buy
Sample
TSSOP24-40 to 85 °CRF1/RF2 OUT
Si4122-D-GM
Buy
Sample
QFN28-40 to 85 °CRF2/IF OUT
Si4122-D-GT
Buy
Sample
TSSOP24-40 to 85 °CRF2/IF OUT
Si4123-D-GM
Buy
Sample
QFN28-40 to 85 °CRF1/IF OUT
Si4123-D-GT
Buy
Sample
TSSOP24-40 to 85 °CRF1/IF OUT
Si4126-F-GM
Buy
Sample
QFN28-40 to 85 °C2.3 GHz/IF OUT
Si4133-D-GM
Buy
Sample

QFN28-40 to 85 °CRF1/RF2/IF OUT
Si4133-D-GT
Buy
Sample

TSSOP24-40 to 85 °CRF1/RF2/IF OUT
Si4136-F-GM
Buy
Sample

QFN28-40 to 85 °C2.5 GHz/2.3 GHz/IF OUT
Si4136-F-GT
Buy
Sample

TSSOP24-40 to 85 °C2.5 GHz/2.3 GHz/IF OUT
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    The Si413x RF Synthesizers include three voltage-controlled oscillators, loop filters, reference and VCO dividers and phase detectors. Variables for dividers, phase detector gain settings and power-down settings are programmable through a three-wire serial interface (data, clock and enable) and a 22-bit internal shift register. The Si4133 comes standard in a low-profile, small-outline, 24-pin package (TSSOP) and 28-lead micro leadframe package (MLP).

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