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TI-LMK04033.pdf
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TI-LMK04033.pdf
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LMK04000, LMK04001, LMK04002, LMK04010
LMK04011, LMK04031, LMK04033
www.ti.com
SNOSAZ8J –SEPTEMBER 2008–REVISED SEPTEMBER 2011
LMK04000 Family Low-Noise Clock Jitter Cleaner with Cascaded PLLs
Check for Samples: LMK04000, LMK04001, LMK04002, LMK04010, LMK04011, LMK04031, LMK04033
1
FEATURES
23
• Cascaded PLLatinum™ PLL Architecture
• Support Clock Rates up to 1080 MHz
– PLL1 • Default Clock Output (CLKout2) at power up
– Phase Detector Rate of up to 40 MHz • Five Dedicated Channel Divider and Delay
Blocks
– Integrated Low-Noise Crystal Oscillator
Circuit • Pin Compatible Family of Clocking Devices
– Dual Redundant Input Reference Clock • Industrial Temperature Range: -40 to 85 °C
with LOS
• 3.15 V to 3.45 V Operation
– PLL2
• Package: 48 Pin WQFN (7.0 x 7.0 x 0.8 mm)
– Normalized [1 Hz] PLL Noise Floor of -
224 dBc/Hz APPLICATIONS
– Phase Detector Rate up to 100 MHz
• Data Converter Clocking
– Input Frequency-Doubler
• Wireless Infrastructure
– Integrated Low-Noise VCO
• Networking, SONET/SDH, DSLAM
• Ultra-Low RMS Jitter Performance
• Medical
– 150 fs RMS Jitter (12 kHz – 20 MHz)
• Military / Aerospace
– 200 fs RMS Jitter (100 Hz – 20 MHz)
• Test and Measurement
• LVPECL/2VPECL, LVDS, and LVCMOS outputs
• Video
DESCRIPTION
The LMK04000 family of precision clock conditioners provides low-noise jitter cleaning, clock multiplication and
distribution without the need for high-performance voltage controlled crystal oscillators (VCXO) module. Using a
cascaded PLLatinum™ architecture combined with an external crystal and varactor diode, the LMK04000 family
provides sub-200 femtosecond (fs) root mean square (RMS) jitter performance.
The cascaded 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 use the integrated crystal oscillator with an external crystal and
a 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 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 crystal used in PLL1.
The LMK04000 family features dual redundant inputs, five differential outputs, and an optional default-clock upon
power up. The input block is equipped with loss of signal detection and automatic or manual selection of the
reference clock. Each clock output consists of a programmable divider, a phase synchronization circuit, a
programmable delay, and an LVDS, LVPECL, or LVCMOS output buffer. The default startup clock is available on
CLKout2 and it can be used to provide an initial clock for the field-programmable gate array (FPGA) or
microcontroller that programs the jitter cleaner during the system power up sequence.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2PLLatinum is a trademark of Texas Instruments.
3All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008–2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
LMK040xx
Precision Clock
Conditioner
Recovered
³GLUW\´FORFNRU
clean clock
0XOWLSOH³FOHDQ´FORFNVDW
different frequencies
Fout
CLKout4
CLKout2A
CLKout1
CLKout0
DAC
Serializer/
Deserializer
LMX2531
PLL+VCO
ADC
> 1 Gsps
FPGA
CLKin0
Crystal or
VCXO
Backup
Reference
Clock
CLKin1
LMK04000, LMK04001, LMK04002, LMK04010
LMK04011, LMK04031, LMK04033
SNOSAZ8J –SEPTEMBER 2008–REVISED SEPTEMBER 2011
www.ti.com
Table 1. Device Configuration Information
2VPECL / LVPECL
NSID PROCESS LVDS OUTPUTS LVCMOS OUTPUTS VCO
OUTPUTS
LMK04000BISQ BiCMOS 3 4 1185 to 1296 MHz
LMK04001BISQ BiCMOS 3 4 1430 to 1570 MHz
LMK04002BISQ BiCMOS 3 4 1600 to 1750 MHz
LMK04010BISQ BiCMOS 5 1185 to 1296 MHz
LMK04011BISQ BiCMOS 5 1430 to 1570 MHz
LMK04031BISQ BiCMOS 2 2 2 1430 to 1570 MHz
LMK04033BISQ BiCMOS 2 2 2 1840 to 2160 MHz
NSID CLKout0 CLKout1 CLKout2 CLKout3 CLKout4
LMK04000BISQ 2VPECL / LVPECL LVCMOS x 2 LVCMOS x 2 2VPECL / LVPECL 2VPECL / LVPECL
LMK04001BISQ 2VPECL / LVPECL LVCMOS x 2 LVCMOS x 2 2VPECL / LVPECL 2VPECL / LVPECL
LMK04002BISQ 2VPECL / LVPECL LVCMOS x 2 LVCMOS x 2 2VPECL / LVPECL 2VPECL / LVPECL
LMK04010BISQ 2VPECL / LVPECL 2VPECL / LVPECL 2VPECL / LVPECL 2VPECL / LVPECL 2VPECL / LVPECL
LMK04011BISQ 2VPECL / LVPECL 2VPECL / LVPECL 2VPECL / LVPECL 2VPECL / LVPECL 2VPECL / LVPECL
LMK04031BISQ LVDS 2VPECL / LVPECL LVCMOS x 2 2VPECL / LVPECL LVDS
LMK04033BISQ LVDS 2VPECL / LVPECL LVCMOS x 2 2VPECL / LVPECL LVDS
2 Submit Documentation Feedback Copyright © 2008–2011, Texas Instruments Incorporated
Product Folder Links: LMK04000 LMK04001 LMK04002 LMK04010 LMK04011 LMK04031 LMK04033
OSCin
OSCin*
R1 Divider
Phase
Detector
PLL1
N1 Divider
VCO
Divider
CLKout4
CLKout4*
CLKout3B
CLKout3A
CLKout2B
CLKout2A
CLKout1
CLKout1*
CPout1
Internal VCO
Partially
Integrated
Loop Filter
Delay
Mux
Delay
Mux
Divider
Delay
Mux
Divider
Delay
Mux
Distribution
Path
CLK
DATA
LE
Control
Registers
PWire
Port
Device
Control
LD
GOE
SYNC*
Fout
Clock Buffers
Mux
Divider
Divider
CLKin0
CLKin0*
CLKin1
CLKin1*
R2 Divider
Phase
Detector
PLL2
N2 Divider
CPout2
2X
CLKout0
CLKout0*
Delay
MuxDivider
LOS
LOS
LOS0
LOS1
Mux
LMK04000, LMK04001, LMK04002, LMK04010
LMK04011, LMK04031, LMK04033
www.ti.com
SNOSAZ8J –SEPTEMBER 2008–REVISED SEPTEMBER 2011
Functional Block Diagram
Copyright © 2008–2011, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Links: LMK04000 LMK04001 LMK04002 LMK04010 LMK04011 LMK04031 LMK04033
4748 46 45 44 43 42 41 40 39 38 37
11
12
10
9
8
7
6
5
4
3
2
1
1413 15 16 17 18 19 20 21 22 23 24
26
25
27
28
29
30
31
32
33
34
35
36GND
Fout
Vcc1
Vcc2
Vcc3
DLD_BYP
Vcc5
Vcc6
CLKin1*
Vcc8
Vcc9
Vcc10
Vcc11
Vcc12
Vcc13
Vcc14
CLKuWire
DATAuWire
LEuWire
NC
LDObyp1
LDObyp2
GOE
LD
CLKout0
CLKout0*
GND
Vcc4
CLKin0
CLKin0*
CPout1
Vcc7
CLKin1
SYNC*
OSCin
OSCin*
CPout2
CLKin0_LOS
CLKin1_LOS
Bias
CLKout1
CLKout1*
CLKout2
CLKout2*
CLKout3
CLKout3*
CLKout4
CLKout4*
DAP
LMK04000, LMK04001, LMK04002, LMK04010
LMK04011, LMK04031, LMK04033
SNOSAZ8J –SEPTEMBER 2008–REVISED SEPTEMBER 2011
www.ti.com
Connection Diagram
Figure 1. 48-Pin WQFN Package
Top View
PIN DESCRIPTIONS
Pin Number Name(s) I/O Type Description
1 GND GND Ground (For Fout Buffer)
2 Fout O ANLG VCO Frequency Output Port
3 V
CC
1 PWR Power Supply for VCO Output Buffer
4 CLKuWire I CMOS Microwire Clock Input
5 DATAuWire I CMOS Microwire Data Input
6 LEuWire I CMOS Microwire Latch Enable Input
7 NC No Connection
8 V
CC
2 PWR Power Supply for VCO
9 LDObyp1 ANLG LDO Bypass, bypassed to ground with a 10 µF capacitor
10 LDObyp2 ANLG LDO Bypass, bypassed to ground with a 0.1 µF
capacitor
11 GOE I CMOS Global Output Enable
12 LD O CMOS Lock Detect and PLL multiplexer Output
13 V
CC
3 PWR Power Supply for CLKout0
14 CLKout0 O LVDS/LVPECL Clock Channel 0 Output
15 CLKout0* O LVDS/LVPECL Clock Channel 0* Output
16 DLD_BYP ANLG DLD Bypass, bypassed to ground with a 0.47 µF
capacitor
17 GND GND Ground (Digital)
18 V
CC
4 PWR Power Supply for Digital
4 Submit Documentation Feedback Copyright © 2008–2011, Texas Instruments Incorporated
Product Folder Links: LMK04000 LMK04001 LMK04002 LMK04010 LMK04011 LMK04031 LMK04033
LMK04000, LMK04001, LMK04002, LMK04010
LMK04011, LMK04031, LMK04033
www.ti.com
SNOSAZ8J –SEPTEMBER 2008–REVISED SEPTEMBER 2011
PIN DESCRIPTIONS (continued)
Pin Number Name(s) I/O Type Description
19 V
CC
5 PWR Power Supply for CLKin buffers and PLL1 R-divider
20 CLKin0 I ANLG Reference Clock Input Port for PLL1 - AC or DC
Coupled
(1)
21 CLKin0* I ANLG Reference Clock Input Port for PLL1 (complimentary) -
AC or DC Coupled
(1)
22 V
CC
6 PWR Power Supply for PLL1 Phase Detector and Charge
Pump
23 CPout1 O ANLG Charge Pump1 Output
24 V
CC
7 PWR Power Supply for PLL1 N-Divider
25 CLKin1 I ANLG Reference Clock Input Port for PLL1 - AC or DC
Coupled
(1)
26 CLKin1* I ANLG Reference Clock Input Port for PLL1 (complimentary) -
AC or DC Coupled
(1)
27 SYNC* I CMOS Global Clock Output Synchronization
28 OSCin I ANLG Reference oscillator Input for PLL2 - AC Coupled
29 OSCin* I ANLG Reference oscillator Input for PLL2 - AC Coupled
30 V
CC
8 PWR Power Supply for OSCin Buffer and PLL2 R-Divider
31 V
CC
9 PWR Power Supply for PLL2 Phase Detector and Charge
Pump
32 CPout2 O ANLG Charge Pump2 Output
33 V
CC
10 PWR Power Supply for VCO Divider and PLL2 N-Divider
34 CLKin0_LOS O LVCMOS Status of CLKin0 reference clock input
35 CLKin1_LOS O LVCMOS Status of CLKin1 reference clock input
36 Bias I ANLG Bias Bypass. AC coupled with 1 µF capacitor to Vcc1
37 V
CC
11 PWR Power Supply for CLKout1
38 CLKout1 O LVPECL/LVCMOS Clock Channel 1 Output
39 CLKout1* O LVPECL/LVCMOS Clock Channel 1* Output
40 V
CC
12 PWR Power Supply for CLKout2
41 CLKout2 O LVPECL/LVCMOS Clock Channel 2 Output
42 CLKout2* O LVPECL/LVCMOS Clock Channel 2* Output
43 V
CC
13 PWR Power Supply for CLKout3
44 CLKout3 O LVPECL Clock Channel 3 Output
45 CLKout3* O LVPECL Clock Channel 3* Output
46 V
CC
14 PWR Power Supply for CLKout4
47 CLKout4 O LVDS/LVPECL Clock Channel 4 Output
48 CLKout4* O LVDS/LVPECL Clock Channel 4* Output
DAP DAP DIE ATTACH PAD, connect to GND
(1) The reference clock inputs may be either AC or DC coupled.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Copyright © 2008–2011, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Links: LMK04000 LMK04001 LMK04002 LMK04010 LMK04011 LMK04031 LMK04033
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