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Overview
Features and Benefits
- Low Noise Integer-N PLL with Integrated VCO
- –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)
- Output Buffer Muting
- Low Noise Reference Buffer
- Charge Pump Current Adjustable from 250μA to 11.2mA
- Configurable Status Output
- SPI Compatible Serial Port Control
- PLLWizard™ Software Design Tool Support
Product Details
The LTC6946 is a high performance, low noise, 6.39GHz phase-locked loop (PLL) with a fully integrated VCO, including a reference divider, phase-frequency detector (PFD) with phase-lock indicator, ultralow noise charge pump, integer feedback divider, and VCO output divider. The charge pump contains selectable high and low voltage clamps useful for VCO monitoring.
The integrated low noise VCO uses no external components. It is internally calibrated to the correct output frequency with no external system support.
The part features a buffered, programmable VCO output divider with a range of 1 through 6, providing a wide frequency range.
| LTC6946-1 | LTC6946-2 | LTC6946-3 | LTC6946-4 | |
| 0 DIV = 1 | 2.240 to 3.740 | 3.080 to 4.910 | 3.840 to 5.790 | 4.200 to 6.390 |
| 0 DIV = 2 | 1.120 to 1.870 | 1.540 to 2.455 | 1.920 to 2.895 | 2.100 to 3.195 |
| 0 DIV = 3 | 0.747 to 1.247 | 1.027 to 1.637 | 1.280 to 1.930 | 1.400 to 2.130 |
| 0 DIV = 4 | 0.560 to 0.935 | 0.770 to 1.228 | 0.960 to 1.448 | 1.050 to 1.598 |
| 0 DIV = 5 | 0.448 to 0.748 | 0.616 to 0.982 | 0.768 to 1.158 | 0.840 to 1.278 |
| 0 DIV = 6 | 0.373 to 0.623 | 0.513 to 0.818 | 0.640 to 0.965 | 0.700 to 1.065 |
Applications
- Wireless Base Stations (LTE, WiMAX, W-CDMA, PCS)
- Broadband Wireless Access
- Military and Secure Radio
- Test and Measurement
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (5)
Documentation
Reliability Data (1)
Evaluation Kit Manuals (1)
Software & Systems Requirements
Evaluation Software
PLLWizard
Tools & Simulations
Linduino
Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.
Linduino code repository on GitHub and instructions on how to use the code.
IBIS Models
Reference Materials
Product Selector Card (1)
Solutions Bulletins & Brochures (1)
Technical Articles (6)
Low Phase Noise Frequency Synthesizers for RF Applications
Press Releases (1)
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Support & Discussions
LTC6946 Discussions
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
