Our new ultralow noise, integer-N frequency synthesizers provide best-in-class phase noise and spurious performance. The LTC®6946 is a complete frequency synthesizer that includes a high performance, low noise, 5.7GHz phase-locked loop (PLL) with a fully integrated, low phase noise VCO. The LTC6945 separates the low 1/f corner PLL core for use with an external VCO up to 6GHz. The free, easy-to-use PLLWizard™ CAD tool quickly and accurately simulates synthesizer performance to ensure an optimal design.
The LTC6946 is an integer-N frequency synthesizer designed for applications requiring best-in-class phase noise and spurious performance. It operates with a VCO input range from 350MHz to 6GHz (for the LTC6945 variant) and includes a high-performance, low-noise PLL with a fully integrated VCO.
| VCO Input Range (LTC6945) | 350MHz to 6GHz |
|---|---|
| Normalized In-Band Phase Noise Floor | -226dBc/Hz |
| Wideband Output Phase Noise Floor | -157dBe/Hz |
| Normalized In-Band 1/f Noise | -274dBe/Hz |
| Spurious Levels | < —100dBe |
| Output Charge Pump Current | Up to 11mA |
| Package Type | 28-Pin (4mm x 5mm) QFN Packages |
The LTC6945 supports a VCO input range from 350MHz to 6GHz.
The device features a low normalized in-band phase noise floor of -226dBc/Hz.
The synthesizer includes a high current output charge pump of up to 11mA.