LMK04826

ACTIVE

Ultra low-noise JESD204B compliant clock jitter cleaner with integrated 1840 to1970-MHz VCO0

Top

Product details

Parameters

Function Dual-loop PLL Number of outputs 15 RMS jitter (fs) 88 Output frequency (Min) (MHz) 0.225 Output frequency (Max) (MHz) 2505 Input type LVCMOS, LVDS, LVPECL Output type LVCMOS, LVDS, LVPECL Supply voltage (Min) (V) 3.15 Supply voltage (Max) (V) 3.45 Features JESD204B Operating temperature range (C) -40 to 85 open-in-new Find other Clock jitter cleaners & synchronizers

Package | Pins | Size

WQFN (NKD) 64 81 mm² 9 x 9 open-in-new Find other Clock jitter cleaners & synchronizers

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 mm × 9.0 mm × 0.8 mm)

All trademarks are the property of their respective owners.

open-in-new Find other Clock jitter cleaners & synchronizers

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 such as 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.

open-in-new Find other Clock jitter cleaners & synchronizers
Download

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 6
Type Title Date
* Data sheet LMK0482x Ultra Low-Noise JESD204B Compliant Clock Jitter Cleaner With Dual Loop PLLs datasheet (Rev. AS) Sep. 27, 2017
Application note Multi-Clock Synchronization Dec. 30, 2019
User guide LMK04826/28 User’s Guide (Rev. B) Mar. 13, 2018
Selection guide TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
Technical article Timing is Everything: Design JESD204B clocking using system reference modes Jun. 16, 2015
Technical article Timing is Everything: JESD204B subclass 1 clocking timing requirements Oct. 29, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
499
Description

The LMK04826BEVM and LMK04828BEVM supports the LMK04820 family of products, the industry's highest performance clock conditioners with JEDEC JESD204B support. The dual loop PLLatinum™ architecture enables sub-100 fs jitter (12 kHz to 20 MHz) using a low noise VCXO module. The dual loop (...)

Features
  • JEDEC JESD204B Support
  • Ultra-low RMS Jitter Performance
  • Dual loop Architecture
  • 3 redundant input clocks with LOS
  • Precision digital delay, fixed or dynamically adjustable
  • Evaluation kit includes USB2ANY module for USB connection to the evaluation board.

Software development

APPLICATION SOFTWARE & FRAMEWORK Download
Clock Design Tool - Loop Filter & Device Configuration + Simulation
CLOCKDESIGNTOOL The Clock Design Tool software helps with part selection, loop filter design and simulation of timing device solutions. When you enter desired output frequencies and a reference frequency (optional), the tool provides TI devices to meet the specified requirements, divider values and a recommended (...)
APPLICATION SOFTWARE & FRAMEWORK Download
Texas Instruments Clocks and Synthesizers (TICS) Pro Software
TICSPRO-SW The TICS Pro software is used to program the evaluation modules (EVMs) for device numbers with these prefixes: CDC, LMK and LMX. These devices include PLLs and voltage-controlled oscillators (PLL+VCO), synthesizers and clocking devices.
Features
  • Program EVMs through the USB2ANY Interface Adaptor or onboard USB interface.
  • Export programming configurations for use in end application.
IDE, CONFIGURATION, COMPILER OR DEBUGGER Download
CodeLoader Software for device register programming
CODELOADER The CodeLoader 4 software is used to program the LMX PLLs and LMK timing devices through either the USB or line print terminal (LPT) port of a computer. This software also provides information on how to program the device by showing the bits that are actually sent.


Which software do I use?

Product

Loop (...)

SUPPORT SOFTWARE Download
SNAC072AI.ZIP (61271 KB)

Design tools & simulation

SIMULATION MODEL Download
SNAM152C.ZIP (153 KB) - IBIS Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
DESIGN TOOL Download
Clock tree architect programming software
CLOCK-TREE-ARCHITECT Clock tree architect is a clock tree synthesis tool that streamlines your design process by generating clock tree solutions based on your system requirements. The tool pulls data from an extensive database of clocking products to generate a system-level multi-chip clocking solution.
Features
  • Accepts customer specific design requirements such as input frequencies, output frequencies, clock formats and clock counts
  • Generates clock trees by taking into account a variety of advanced specifications, such as noise floor and phase determinism requirements
  • Presents clear and intuitive block (...)

CAD/CAE symbols

Package Pins Download
WQFN (NKD) 64 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos