Linear Technology LTC6945
The LTC®6945 is a high performance, low noise, 6GHz phaselocked loop (PLL), including a reference divider, phasefrequency detector (PFD) with phase-lock indicator, charge pump, integer feedback divider and VCO output divider. The part features a buffered, programmable VCO output divider with a range of 1 through 6.
| Part No. |
LTC6945 |
| Datasheet |
LTC6945
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|
| Manufacturer |
 Linear Technology |
| Description |
Ultralow Noise and Spurious 0.35GHz to 6GHz Integer-N Synthesizer |
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FEATURES
Ultralow Noise and Spurious 0.35GHz to 6GHz Integer-N Synthesizer DESCRIPTION
nn Low Noise Integer-N PLL nn 350MHz to 6GHz VCO Input Range nn –226dBc/Hz Normalized In-Band Phase Noise Floor nn –274dBc/Hz Normalized In-Band 1/f Noise nn –157dBc/Hz Wideband Output Phase Noise Floor nn Excellent Spurious Performance nn Output Divider (1 to 6, 50% Duty Cycle) nn Low Noise Reference Buffer nn Output Buffer Muting nn Charge Pump Supply from 3.15V to 5.25V nn Charge Pump Current from 250µA to 11.2mA nn Configurable Status Output nn SPI Compatible Serial Port Control nn PLLWizard™ Software Design Tool Support APPLICATIONS
nn Wireless Base Stations (LTE, WiMAX, W-CDMA, PCS) nn Broadband Wireless Access nn Microwave Data Links nn Military and Secure Radio nn Test and Measurement The differential, low noise output buffer has user-programmable output power ranging from –6dBm to 3dBm, and may be muted through either a digital input pin or software. The low noise reference buffer outputs a typical 0dBm square wave directly into a 50Ω impedance from 10MHz to 250MHz, or may be disabled through software.
