LTC6947IUFD#PBF

LTC®6947 is a high performance, ultralow noise, fractional-N synthesizer has 6GHz phase-locked loop (PLL), including a reference divider, phase-frequency detector (PFD), ultralow noise charge pump, fractional feedback divider, and VCO output divider. The fractional divider uses an advanced, 4th order Δ∑ modulator which provides exceptionally low spurious levels. This allows wide loop bandwidths, producing extremely low integrated phase noise values. The programmable VCO output divider, with a range of 1 through 6, extends the output frequency range. The differential, low-noise output buffer has user-programmable output power ranging from –4.3dBmto +4.5dBm, and may be muted through either a digital input pin or software. Application includes wireless base stations (LTE, WiMAX, W-CDMA, PCS), broadband wireless access, microwave data links, military and secure radio, test and measurement.

• Low noise fractional-N PLL, no ∆Σ modulator spurs
• Excellent integer boundary spurious performance, output divider (1 to 6, 50% duty cycle)
• Output buffer muting, fast frequency switching
• FracNWizard™ software design tool support
• Input frequency range from 350 to 6000MHz (TA=25°C, VREF+=VD +=VRF+=VVCO+=3.3V)
• Input power level range from –8 to 6dBm (TA=25°C, VREF+=VD +=VRF+=VVCO+=3.3V)
• Output frequency range from 350 to 6000MHz (TA=25°C, VREF+=VD +=VRF+=VVCO+=3.3V)
• Typical output duty cycle is 50% (TA=25°C, VREF+=VD +=VRF+=VVCO+=3.3V)
• Output current range from 1 to 11.2mA (8 settings, TA=25°C, VREF+=VD +=VRF+=VVCO+=3.3V)
• 28-lead plastic QFN, junction temperature range from -40°C to 105°C

附註

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