Overview
The LTC6948IUFD-3#PBF is a high-performance, low-noise phase-locked loop (PLL) synthesizer produced by Analog Devices Inc. This component features a fully integrated voltage-controlled oscillator (VCO), a reference divider, a phase-frequency detector (PFD), an ultralow noise charge pump, a fractional feedback divider, and a VCO output divider. It is designed to provide exceptional phase noise performance and is widely used in various high-frequency applications.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Input Frequency Range | 10 - 425 | MHz |
| VCO Frequency Range | 3.84 - 5.79 | GHz |
| Output Frequency Range | 0.373 - 6.39 | GHz |
| Output Divider Range | 1 - 6 | |
| Supply Voltage | 3.15 - 5.25 | V |
| Operating Temperature | -40°C to 105°C | |
| Package Type | 28-lead QFN Exposed Pad | |
| Normalized In-Band Phase Noise | -226 dBc/Hz (typ) | |
| Normalized In-Band 1/f Phase Noise | -274 dBc/Hz (typ) |
Key Features
- High performance, low noise PLL synthesizer with a fully integrated VCO.
- Advanced 4th order Δ∑ modulator for exceptionally low spurious levels.
- Wide loop bandwidths producing extremely low integrated phase noise values.
- Fast frequency switching and support for FracNWizard™ software design tool.
- Output buffer muting and reference input frequency up to 425 MHz.
- Excellent integer boundary spurious performance.
- Input duty cycle of 50%.
Applications
- Wireless base stations (LTE, WiMAX, W-CDMA, PCS).
- Microwave data links.
- Military and secure radio systems.
- Test and measurement equipment.
Q & A
- What is the VCO frequency range of the LTC6948IUFD-3#PBF? The VCO frequency range is from 3.84 GHz to 5.79 GHz.
- What is the input frequency range for the reference inputs? The input frequency range is from 10 MHz to 425 MHz.
- What type of package does the LTC6948IUFD-3#PBF come in? It comes in a 28-lead QFN Exposed Pad package.
- What is the operating temperature range of the LTC6948IUFD-3#PBF? The operating temperature range is from -40°C to 105°C.
- What is the normalized in-band phase noise of the LTC6948IUFD-3#PBF? The normalized in-band phase noise is typically -226 dBc/Hz.
- Does the LTC6948IUFD-3#PBF support fast frequency switching? Yes, it supports fast frequency switching.
- What is the purpose of the Δ∑ modulator in the LTC6948IUFD-3#PBF? The Δ∑ modulator is used to achieve exceptionally low spurious levels.
- In which applications is the LTC6948IUFD-3#PBF commonly used? It is commonly used in wireless base stations, microwave data links, military and secure radio systems, and test and measurement equipment.
- What is the supply voltage range for the LTC6948IUFD-3#PBF? The supply voltage range is from 3.15 V to 5.25 V.
- Is the LTC6948IUFD-3#PBF suitable for high-frequency applications? Yes, it is designed for high-frequency applications.
