LTC6946 - Ultralow Noise and Spurious 0.37GHz to 6.39GHz Integer-N Synthesizer with Integrated VCO

The LTC®6946 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.

Features
  • 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
  • PLLWizard™ Software Design Tool Support
Typical Application
LTC6946 Typical Application
LTC6946 Typical Application
Applications
  • Wireless Base Stations (LTE, WiMAX, W-CDMA, PCS)
  • Broadband Wireless Access
  • Military and Secure Radio
  • Test and Measurement
Packaging
LTC6946 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC6946IUFD-1#PBF4x5 QFN-28I$8.22$5.75
LTC6946IUFD-1#TRPBF4x5 QFN-28I$5.81
LTC6946IUFD-2#PBF4x5 QFN-28I$8.22$5.75
LTC6946IUFD-2#TRPBF4x5 QFN-28I$5.81
LTC6946IUFD-3#PBF4x5 QFN-28I$8.22$5.75
LTC6946IUFD-3#TRPBF4x5 QFN-28I$5.81
LTC6946IUFD-4#PBF4x5 QFN-28I$8.22$5.75
LTC6946IUFD-4#TRPBF4x5 QFN-28I$5.81
Demo Boards
Part NumberDescriptionPrice
DC1705C-ALTC6946-1 Demo Board| Ultralow Noise and Spurious 373MHz to 3.74GHz Integer-N Synthesizer with Integrated VCO (Req DC590 or DC2026)$125.00
DC1705C-BLTC6946-2 Demo Board | Ultralow Noise and Spurious 513MHz to 4.91GHz Integer-N Synthesizer with Integrated VCO (Req DC590 or DC2026)$125.00
DC1705C-CLTC6946-3 Demo Board | Ultralow Noise and Spurious 640MHz to 5.79GHz Integer-N Synthesizer with Integrated VCO (Req DC590 or DC2026)$125.00
DC1705C-DLTC6946-4 Demo Board | Ultralow Noise and Spurious 700MHz to 6.39GHz Integer-N Synthesizer with Integrated VCO (Req DC590 or DC2026)$125.00
Companion Boards
Part NumberDescriptionPrice
DC2026CLinduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform$75.00
DC2429ALT3042 PLL/VCO Supply and Reference Board$150.00
DC590BIsolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards$50.00
Datasheet
Application Note
Design Note
Reliability Data
Product Selector Card
LT Journal
Article
Press Release
Software and Simulation
CAD Symbol
Ad
Linduino
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LTC6946 Footprints and Symbols
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LTC6946 - DC1705C.INO
LTC6946 Linduino .CPP File
LTC6946 Linduino Header File