LMK04800 Clock Conditioners

Texas Instruments' clock conditioners with superior clock jitter cleaning, generation, and distribution with advanced features to meet next generation system requirements

image of Texas Instruments' LMK04800 Clock ConditionersTexas Instruments' LMK04800 family is the industry's highest performance clock conditioner with superior clock jitter cleaning, generation, and distribution with advanced features to meet next generation system requirements. The dual loop PLLatinum™ architecture enables 111 fs rms jitter (12 kHz to 20 MHz) using a low noise VCXO module or sub-200 fs rms jitter (12 kHz to 20 MHz) using a low cost external crystal and varactor diode. The dual loop architecture consists of two high-performance phase-locked loops (PLL), a low-noise crystal oscillator circuit, and a high-performance voltage controlled oscillator (VCO). The first PLL (PLL1) provides a low-noise jitter cleaner function while the second PLL (PLL2) performs the clock generation. PLL1 can be configured to either work with an external VCXO module or the integrated crystal oscillator with an external tunable crystal and varactor diode. When used with a very narrow loop bandwidth, PLL1 uses the superior close-in phase noise (offsets below 50 kHz) of the VCXO module or the tunable crystal to clean the input clock. The output of PLL1 is used as the clean input reference to PLL2 where it locks the integrated VCO. The loop bandwidth of PLL2 can be optimized to clean the far-out phase noise (offsets above 50 kHz) where the integrated VCO outperforms the VCXO module or tunable crystal used in PLL1.

Features Applications
  • Ultra-low RMS jitter performance
  • Dual loop PLLatinum PLL architecture
  • Two redundant input clocks with LOS
  • 50% duty cycle output divides, 1 to 1045 (even and odd)
  • LVPECL, LVDS, or LVCMOS programmable outputs
  • Precision digital delay, fixed or dynamically adjustable
  • Data converter clocking
  • Wireless infrastructure
  • Networking, SONET/SDH, DSLAM
  • Medical / video / military / aerospace
  • Test and measurement

Clock Conditioners

ImageManufacturer Part NumberDescriptionTypePLLAvailable Quantity
LMK04803BISQE/NOPB datasheet linkIC CLOCK DUAL PLL 64WQFNLMK04803BISQE/NOPBIC CLOCK DUAL PLL 64WQFNJitter CleanerYes533 - Immediate
LMK04803BISQE/NOPB product page link
LMK04808BISQE/NOPB datasheet linkIC CLOCK DUAL PLL 64WQFNLMK04808BISQE/NOPBIC CLOCK DUAL PLL 64WQFNJitter CleanerYes431 - Immediate
LMK04808BISQE/NOPB product page link
LMK04806BISQE/NOPB datasheet linkIC CLOCK DUAL PLL 64WQFNLMK04806BISQE/NOPBIC CLOCK DUAL PLL 64WQFNJitter CleanerYes150 - Immediate
LMK04806BISQE/NOPB product page link
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Published: 2011-07-25