LMK04906 Texas instruments

LMK04906

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LMK04906

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Описание

The LMK04906 is the industrys highest performance clock jitter attenuator with superior clock jitter cleaning, generation, and distribution with advanced features to meet high performance timing application needs.The LMK04906 accepts 3 clock inputs ranging from 1 kHz to 500 MHz and generates 6 unique clock output frequencies ranging from 284 kHz to 2.6 GHz. The LMK04906 can also buffer a crystal or VCXO to generate a 7th unique clock frequency. The device provides virtually all frequency translation combinations required for SONET, Ethernet, Fibre Channel and multi-mode Wireless Base Stations.The LMK04906 input clock frequency and clock multiplication ratio are programmable through a SPI interface.

Ultralow RMS Jitter Performance
- 100-fs RMS Jitter (12 kHz to 20 MHz)
- 123-fs RMS Jitter (100 Hz to 20 MHz)
Dual Loop PLLatinum™ PLL Architecture
- PLL1
  - Integrated Low-Noise Crystal Oscillator Circuit
  - Holdover Mode when Input Clocks are Lost
    - Automatic or Manual Triggering/Recovery
- PLL2
  - Normalized [1 Hz] PLL Noise Floor of –227 dBc/Hz
  - Phase Detector Rate up to 155 MHz
  - OSCin Frequency-doubler
  - Integrated Low-Noise VCO
3 Redundant Input Clocks with LOS
- Automatic and Manual Switch-Over Modes
50% Duty Cycle Output Divides, 1 to 1045 (Even and Odd)
LVPECL, LVDS, or LVCMOS Programmable Outputs
Precision Digital Delay, Fixed or Dynamically Adjustable
25-ps Step Analog Delay Control.
6 Differential Outputs. Up to 12 Single Ended.
- Up to 5 VCXO/Crystal Buffered Outputs
Clock Rates of up to 2600 MHz
0-Delay Mode
Three Default Clock Outputs at Power Up
Multi-mode: Dual PLL, Single PLL, and Clock Distribution
Industrial Temperature Range: –40 to 85 °C
3.15-V to 3.45-V Operation
Package: 64-Pin WQFN (9 mm × 9 mm × 0.8 mm)

Function	Dual-loop PLL
Number of outputs	7
RMS jitter (fs)	100
Output frequency (min) (MHz)	0.22
Output frequency (max) (MHz)	2600
Input type	LVCMOS, LVDS, LVPECL
Output type	LVCMOS, LVDS, LVPECL
Supply voltage (min) (V)	3.15
Supply voltage (max) (V)	3.45
Features	0 Delay
Rating	Catalog
Operating temperature range (°C)	-40 to 85
Number of input channels	3