Ultra Low Jitter Synthesizer and Jitter Cleaner - LMK04826

LMK04826 (ACTIVE)

Ultra Low Jitter Synthesizer and Jitter Cleaner

 

Description

The LMK0482x family is the industry’s highest performance clock conditioner with JEDEC JESD204B support.

The 14 clock outputs from PLL2 can be configured to drive seven JESD204B converters or other logic devices using device and SYSREF clocks. SYSREF can be provided using both DC and AC coupling. Not limited to JESD204B applications, each of the 14 outputs can be individually configured as high performance outputs for traditional clocking systems.

The high performance combined with features like the ability to trade off between power or performance, dual VCOs, dynamic digital delay, holdover, and glitchless analog delay make the LMK0482x family ideal for providing flexible high performance clocking trees.

Features

  • JEDEC JESD204B Support
  • Ultra-Low RMS Jitter
    • 88 fs RMS Jitter (12 kHz to 20 MHz)
    • 91 fs RMS Jitter (100 Hz to 20 MHz)
    • –162.5 dBc/Hz Noise Floor at 245.76 MHz
  • Up to 14 Differential Device Clocks from PLL2
    • Up to 7 SYSREF Clocks
    • Maximum Clock Output Frequency 3.1 GHz
    • LVPECL, LVDS, HSDS, LCPECL
      Programmable Outputs from PLL2
  • Up to 1 Buffered VCXO/Crystal Output from PLL1
    • LVPECL, LVDS, 2xLVCMOS Programmable
  • Dual Loop PLLatinum™ PLL Architecture
  • PLL1
    • Up to 3 Redundant Input Clocks
      • Automatic and Manual Switch-Over Modes
      • Hitless Switching and LOS
    • Integrated Low-Noise Crystal Oscillator Circuit
    • Holdover mode when Input Clocks are Lost
  • PLL2
    • Normalized [1 Hz] PLL Noise Floor of
      –227 dBc/Hz
    • Phase Detector Rate up to 155 MHz
    • OSCin Frequency-Doubler
    • Two Integrated Low-Noise VCOs
  • 50% Duty Cycle Output Divides, 1 to 32
    (even and odd)
  • Precision Digital Delay, Dynamically Adjustable
  • 25 ps Step Analog Delay
  • Multi-mode: Dual PLL, single PLL, and Clock
    Distribution
  • Industrial Temperature Range: –40 to 85°C
  • Supports 105°C PCB Temperature (Measured at Thermal Pad)
  • 3.15-V to 3.45-V Operation
  • Package: 64-pin QFN (9.0 × 9.0 × 0.8 mm)

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Parametrics Compare all products in Dual / Cascaded PLL

 
Number of Outputs
Output Level
Output Frequency (Min) (MHz)
Output Frequency (Max) (MHz)
Number of Inputs
Input Level
RMS Jitter
VCO Frequency (Min) (MHz)
VCO Frequency (Max) (MHz)
Supply Voltage (Min) (V)
Supply Voltage (Max) (V)
Features
Operating Temperature Range (C)
Pin/Package
LMK04826 LMK04616 LMK04808 LMK04821 LMK04828 LMK04832
15    16    14    15    15    14   
HSDS
LCPECL
LVCMOS
LVDS
LVPECL   
HCSL
HSDS
LVDS
LVPECL   
LVCMOS
LVDS
LVPECL   
HSDS
LCPECL
LVCMOS
LVDS
LVPECL   
HSDS
LCPECL
LVCMOS
LVDS
LVPECL   
CML
HSDS
LCPECL
LVCMOS
LVDS
LVPECL   
0.225    0.03    0.22    0.045    0.289    0.305   
2505    2000    3072    2075    3080    3250   
3    4    2    3    3    3   
CML
HSDS
LCPECL
LVCMOS
LVDS
LVPECL   
CML
HSDS
LCPECL
LVCMOS
LVDS
LVPECL   
CML
HSDS
LCPECL
LVCMOS
LVDS
LVPECL   
CML
HSDS
LCPECL
LVCMOS
LVDS
LVPECL   
CML
HSDS
LCPECL
LVCMOS
LVDS
LVPECL   
 
0.089    0.065    0.111    0.091    0.088    0.047   
1840    5800    2750    365    2370    2495   
2505    6200    3072    2075    3080    3205   
3.15    1.7    3.15    3.15    3.15    3.15   
3.45    3.465    3.45    3.45    3.45    3.45   
105C PCB temp
Holdover mode
Int. xtal oscillator
JESD204B SYSREF Generation
Manual/auto switch
SPI
uWire   
105C PCB temp
Holdover mode
JESD204B SYSREF
JESD204B SYSREF Generation
Jitter Cleaner/Clock Generator/Clock Distribution
Integrated LDOs
Integrated Loop Filters
Low Power Design
Manual and automatic switching between inputs
Semi-Digital PLL
SPI   
uWire
SPI
Holdover mode
Manual/auto switch
Int. xtal oscillator   
105C PCB temp
Holdover mode
Int. xtal oscillator
JESD204B SYSREF Generation
Manual/auto switch
SPI
uWire   
105C PCB temp
Holdover mode
Int. xtal oscillator
JESD204B SYSREF Generation
Manual/auto switch
SPI
uWire   
Holdover mode
JESD204B SYSREF Generation
Manual/auto switch
SPI   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
64WQFN    144NFBGA    64WQFN    64WQFN    64WQFN    64WQFN   

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