LTC6945IUFD

Ultralow Noise and Spurious 0.35GHz to 6GHz Integer-N Synthesizer

DESCRIPTION

The LTC®6945 is a high performance, low noise, 6GHz phase locked loop PLL, including a reference divider, phase frequency 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. 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.

FEATURES

■ Low Noise Integer-N PLL

■ 350MHz to 6GHz VCO Input Range

■ –226dBc/Hz Normalized In-Band Phase Noise Floor

■ –274dBc/Hz Normalized In-Band 1/f Noise

■ –157dBc/Hz Wideband Output Phase Noise Floor

■ Excellent Spurious Performance

■ Output Divider 1 to 6, 50% Duty Cycle

■ Low Noise Reference Buffer

■ Output Buffer Muting

■ Charge Pump Supply from 3.15V to 5.25V

■ Charge Pump Current from 250μA to 11.2mA

■ Configurable Status Output

■ SPI Compatible Serial Port Control

■ PLLWizard™ Software Design Tool Support

APPLICATIONS

■ Wireless Base Stations LTE, WiMAX, W-CDMA, PCS

■ Broadband Wireless Access

■ Microwave Data Links

■ Military and Secure Radio

■ Test and Measurement