Overview
The LTC6951IUHF#PBF is a high-performance, low-noise Phase-Locked Loop (PLL) with a fully integrated Voltage-Controlled Oscillator (VCO) from Analog Devices Inc. This component is designed to provide excellent phase noise and spurious performance, making it suitable for a variety of high-frequency applications. The LTC6951 features a wide frequency range and high accuracy, ensuring reliable operation across different conditions.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Reference Inputs (REF+, REF–) | fREF Input Frequency | 10 | - | 425 | MHz |
| VREF Input Signal Level | Single-Ended | 0.5 | 2 | 2.7 | Vp-p |
| Input Slew Rate | - | - | 20 | - | V/μs |
| Input Duty Cycle | - | - | 50 | - | % |
| VCO Frequency Range | LTC6951 | 4.0 | - | 5.0 | GHz |
| VCO Frequency Range | LTC6951-1 | 4.3 | - | 5.4 | GHz |
| KVCO Tuning Sensitivity | - | 2.5 | - | 3.7 | %/Hz/V |
| Phase/Frequency Detector (PFD) Input Frequency | - | - | - | 100 | MHz |
| Charge Pump (CP) Output Current Range | - | 1.0 | - | 11.2 | mA |
| Output Current Source/Sink Accuracy | V(CP) = 2.3V | - | - | ±6% | - |
| VCO Phase Noise (fVCO = 4.0GHz, fOUT0 = 2.0GHz) | 10kHz Offset | -87 | - | - | dBc/Hz |
| VCO Phase Noise (fVCO = 4.0GHz, fOUT0 = 2.0GHz) | 100kHz Offset | -113 | - | - | dBc/Hz |
| VCO Phase Noise (fVCO = 4.0GHz, fOUT0 = 2.0GHz) | 1MHz Offset | -135 | - | - | dBc/Hz |
Key Features
- High-performance, low-noise Phase-Locked Loop (PLL) with a fully integrated Voltage-Controlled Oscillator (VCO).
- No external components required for the VCO.
- Wide frequency range: 4.0 GHz to 5.4 GHz.
- High accuracy and low phase noise.
- Eight settings for charge pump output current.
- High output current source/sink accuracy.
- Operating temperature range: –40°C to 105°C.
- Available in a 40-lead (5mm × 7mm) plastic QFN package.
Applications
The LTC6951IUHF#PBF is suitable for various high-frequency applications, including:
- Wireless communication systems.
- Telecommunication equipment.
- Test and measurement instruments.
- High-speed data transmission systems.
- Radar and military communication systems.
Q & A
- What is the operating temperature range of the LTC6951IUHF#PBF?
The operating temperature range is –40°C to 105°C. - What is the frequency range of the VCO in the LTC6951?
The VCO frequency range is from 4.0 GHz to 5.0 GHz for the LTC6951 and from 4.3 GHz to 5.4 GHz for the LTC6951-1. - Does the LTC6951 require external components for the VCO?
No, the VCO in the LTC6951 does not require any external components. - What is the input frequency range for the reference inputs (REF+, REF–)?
The input frequency range for the reference inputs is from 10 MHz to 425 MHz. - What are the typical phase noise values for the LTC6951 at different offsets?
At 10 kHz offset, the phase noise is typically –87 dBc/Hz; at 100 kHz offset, it is –113 dBc/Hz; and at 1 MHz offset, it is –135 dBc/Hz. - What is the package type and size of the LTC6951IUHF#PBF?
The LTC6951IUHF#PBF is available in a 40-lead (5mm × 7mm) plastic QFN package. - How many settings are available for the charge pump output current?
There are eight settings available for the charge pump output current. - What is the typical output current source/sink accuracy of the charge pump?
The typical output current source/sink accuracy is ±6% at V(CP) = 2.3V. - What are some common applications of the LTC6951IUHF#PBF?
Common applications include wireless communication systems, telecommunication equipment, test and measurement instruments, high-speed data transmission systems, and radar and military communication systems. - Is the LTC6951IUHF#PBF RoHS compliant?
