LMK02000 Datasheet, PDF (1/24 Pages) National Semiconductor (TI) – Precision Clock Conditioner with Integrated PLL

LMK02000
www.ti.com
SNAS390D – NOVEMBER 2006 – REVISED SEPTEMBER 2007
Precision Clock Conditioner with Integrated PLL
Check for Samples: LMK02000
FEATURES
1
•2 20 fs Additive Jitter
• Integrated Integer-N PLL with Outstanding
Normalized Phase Noise Contribution of -224
dBc/Hz
• Clock Output Frequency Range of 1 to 800
MHz
• 3 LVDS and 5 LVPECL Clock Outputs
• Dedicated Divider and Delay Blocks on Each
Clock Output
• Pin Compatible Family of Clocking Devices
• 3.15 to 3.45 V Operation
• Package: 48 Pin WQFN (7.0 x 7.0 x 0.8 mm)
TARGET APPLICATIONS
• Data Converter Clocking
• Networking, SONET/SDH, DSLAM
• Wireless Infrastructure
• Medical
• Test and Measurement
• Military / Aerospace
DESCRIPTION
The LMK02000 precision clock conditioner combines
the functions of jitter cleaning/reconditioning,
multiplication, and distribution of a reference clock.
The device integrates a high performance Integer-N
Phase Locked Loop (PLL), three LVDS, and five
LVPECL clock output distribution blocks.
Each clock distribution block includes a
programmable divider, a phase synchronization
circuit, a programmable delay, a clock output mux,
and an LVDS or LVPECL output buffer. This allows
multiple integer-related and phase-adjusted copies of
the reference to be distributed to eight system
components.
The clock conditioner comes in a 48-pin WQFN
package and is footprint compatible with other
clocking devices in the same family.
Functional Block Diagram
OSCin
OSCin*
Fin
Distribution Path
Fin*
R Divider
N Divider
Phase
Detector
Charge
Pump
CPout
CLKout0
CLKout0*
Mux
Divider
Delay
Divider
Mux
Delay
CLKout4
CLKout4*
CLKout1
CLKout1*
Mux
Divider
Delay
Divider
Mux
Delay
CLKout5
CLKout5*
CLKout2
CLKout2*
Mux
Divider
Delay
Divider
Mux
Delay
CLKout6
CLKout6*
CLKout3
CLKout3*
Mux
Divider
Delay
Divider
Mux
Delay
CLKout7
CLKout7*
Low Clock Buffers
High Clock Buffers
CLK
DATA
LE
PWire
Port
Control
Registers
GOE
SYNC*
Device
LD
Control
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006–2007, Texas Instruments Incorporated