LTC6954
Low Phase Noise, Triple Output Clock Distribution Divider/Driver
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- Low Noise Clock Distribution: Suitable for High Speed/High Resolution ADC Clocking
- Additive Jitter < 20fsRMS (12kHz to 20MHz)
- Additive Jitter < 85fsRMS (10Hz to Nyquist)
- 1.8GHz Maximum Input Frequency (LTC6954-1 When DELAY = 0)
- 1.4GHz Maximum Input Frequency (LTC6954-1 When DELAY > 0, LTC6954-2, -3, -4)
- EZSync™ Clock Synchronization Compatible
- Three Independent, Low Noise Outputs
- Four Output Combinations Available
- Three Independent Programmable Dividers Covering All Integers From 1 to 63
- Three Independent Programmable Delays Covering All Integers From 0 to 63
- –40°C to 105°C Junction Temperature Range
The LTC6954 is a family of very low phase noise clock distribution parts. Each part has three outputs and each output has an individually programmable frequency divider and delay. There are four members of the family, differing in their output logic signal type:
LTC6954-1: Three LVPECL outputs
LTC6954-2: Two LVPECL and one LVDS/CMOS outputs
LTC6954-3: One LVPECL and two LVDS/CMOS outputs
LTC6954-4: Three LVDS/CMOS outputs
Each output is individually programmable to divide the input frequency by any integer from 1 to 63, and to delay each output by 0 to 63 input clock cycles. The output duty cycle is always 50%, regardless of the divide number. The LVDS/CMOS outputs are jumper selectable via the OUTxSEL pins to provide either an LVDS logic output or a CMOS logic output.
The LTC6954 also features Linear Technology’s EZSync system for perfect clock synchronization and alignment every time.
All device settings are controlled through an SPI-compatible serial port.
Applications
- Clocking High Speed, High Resolution ADCs, DACs and Data Acquisition Systems
- Low Jitter Clock Distribution
Ask a Question
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LTC6954
Documentation
Filters
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Data Sheet
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Application Note
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User Guide
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2.00M
Reliability Data
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53.84 K
Technical Articles
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Documentation
Data Sheet 1
Reliability Data 1
User Guide 1
Application Note 1
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
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LTC6954IUFF-1#PBF | 36-Lead QFN (4mm x 7mm x 0.75mm w/ EP) |
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LTC6954IUFF-1#TRPBF | 36-Lead QFN (4mm x 7mm x 0.75mm w/ EP) |
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LTC6954IUFF-2#TRPBF | 36-Lead QFN (4mm x 7mm x 0.75mm w/ EP) |
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LTC6954IUFF-3#PBF | 36-Lead QFN (4mm x 7mm x 0.75mm w/ EP) |
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LTC6954IUFF-3#TRPBF | 36-Lead QFN (4mm x 7mm x 0.75mm w/ EP) |
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LTC6954IUFF-4#PBF | 36-Lead QFN (4mm x 7mm x 0.75mm w/ EP) |
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LTC6954IUFF-4#TRPBF | 36-Lead QFN (4mm x 7mm x 0.75mm w/ EP) |
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- LTC6954IUFF-1#PBF
- Pin/Package Drawing
- 36-Lead QFN (4mm x 7mm x 0.75mm w/ EP)
- Documentation
- HTML Material Declaration
- HTML Reliablity Data
- CAD Symbols, Footprints, and 3D Models
- Ultra Librarian
- SamacSys
- LTC6954IUFF-1#TRPBF
- Pin/Package Drawing
- 36-Lead QFN (4mm x 7mm x 0.75mm w/ EP)
- Documentation
- HTML Material Declaration
- HTML Reliablity Data
- CAD Symbols, Footprints, and 3D Models
- Ultra Librarian
- SamacSys
- LTC6954IUFF-2#TRPBF
- Pin/Package Drawing
- 36-Lead QFN (4mm x 7mm x 0.75mm w/ EP)
- Documentation
- HTML Material Declaration
- HTML Reliablity Data
- CAD Symbols, Footprints, and 3D Models
- Ultra Librarian
- SamacSys
- LTC6954IUFF-3#PBF
- Pin/Package Drawing
- 36-Lead QFN (4mm x 7mm x 0.75mm w/ EP)
- Documentation
- HTML Material Declaration
- HTML Reliablity Data
- CAD Symbols, Footprints, and 3D Models
- Ultra Librarian
- SamacSys
- LTC6954IUFF-3#TRPBF
- Pin/Package Drawing
- 36-Lead QFN (4mm x 7mm x 0.75mm w/ EP)
- Documentation
- HTML Material Declaration
- HTML Reliablity Data
- CAD Symbols, Footprints, and 3D Models
- Ultra Librarian
- SamacSys
- LTC6954IUFF-4#PBF
- Pin/Package Drawing
- 36-Lead QFN (4mm x 7mm x 0.75mm w/ EP)
- Documentation
- HTML Material Declaration
- HTML Reliablity Data
- CAD Symbols, Footprints, and 3D Models
- Ultra Librarian
- SamacSys
- LTC6954IUFF-4#TRPBF
- Pin/Package Drawing
- 36-Lead QFN (4mm x 7mm x 0.75mm w/ EP)
- Documentation
- HTML Material Declaration
- HTML Reliablity Data
- CAD Symbols, Footprints, and 3D Models
- Ultra Librarian
- SamacSys
Filter by Model
Part Models
Product Lifecycle
PCN
Jun 10, 2019
- 19_0133
LTC6954 Datasheet Change
LTC6954IUFF-1#PBF
LTC6954IUFF-1#TRPBF
LTC6954IUFF-2#TRPBF
LTC6954IUFF-3#PBF
LTC6954IUFF-3#TRPBF
LTC6954IUFF-4#PBF
LTC6954IUFF-4#TRPBF
Mar 20, 2024
- 23_0089
Obsolescence of Tower Fab3 (JAZZ-3) SBC35 Process
LTC6954IUFF-1#PBF
LTC6954IUFF-1#TRPBF
LTC6954IUFF-2#TRPBF
LTC6954IUFF-3#PBF
LTC6954IUFF-3#TRPBF
LTC6954IUFF-4#PBF
LTC6954IUFF-4#TRPBF
Filter by Model
Part Models
Product Lifecycle
PCN
Jun 10, 2019
- 19_0133
LTC6954 Datasheet Change
LTC6954IUFF-1#PBF
LTC6954IUFF-1#TRPBF
LTC6954IUFF-2#TRPBF
LTC6954IUFF-3#PBF
LTC6954IUFF-3#TRPBF
LTC6954IUFF-4#PBF
LTC6954IUFF-4#TRPBF
Mar 20, 2024
- 23_0089
Obsolescence of Tower Fab3 (JAZZ-3) SBC35 Process
LTC6954IUFF-1#PBF
LTC6954IUFF-1#TRPBF
LTC6954IUFF-2#TRPBF
LTC6954IUFF-3#PBF
LTC6954IUFF-3#TRPBF
LTC6954IUFF-4#PBF
LTC6954IUFF-4#TRPBF
Software & Part Ecosystem
Parts | Product Life Cycle | Description | ||
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Clock Generation Devices2 |
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LAST TIME BUY |
Ultralow Jitter, 4.5GHz PLL with 11 Outputs and JESD204B / JESD204C Support |
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LAST TIME BUY |
Ultralow Jitter Multi-Output Clock Synthesizer with Integrated VCO |
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High Speed Comparators (<100ns Propagation Delay)1 |
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Low Phase Noise, Dual Output Buffer/Driver/Logic Converter |
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Integer-N PLL1 |
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LAST TIME BUY |
Ultralow Noise and Spurious 0.37GHz to 6.39GHz Integer-N Synthesizer with Integrated VCO |
Parts | Product Life Cycle | Description |
---|---|---|
RECOMMENDED FOR NEW DESIGNS |
1.65 GHz Clock Fanout Buffer with Output Dividers and Delay Adjust |
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RECOMMENDED FOR NEW DESIGNS |
1.6 GHz Clock Distribution IC, Dividers, Delay Adjust, Three Outputs |
LTC6954_GUI is used to communicate with the LTC6954 clock driver. It uses the DC590 to translate between USB and SPI-compatible serial communications formats.
Evaluation Kits 4
DC1954A-A
LTC6954-1 Demo Board | Low Phase Noise, Triple Output Clock Distribution Divider/Driver, 3 LVPECL Outputs (Requires DC590 or DC2026)
Product Detail
Demonstration Circuit 1954A features the LTC6954, a Low Phase Noise, Triple Output Clock Distribution Divider/ Driver.
There are four options of the DC1954A, one for each version of the LTC6954. Table 1 summarizes the available DC1954A options.
Resources
DC1954A-C
LTC6954-3 Demo Board | Low Phase Noise, Triple Output Clock Distribution Divider/Driver, 1 LVPECL and 2 LVDS/CMOS outputs (Requires DC590 or DC2026)
Product Detail
Demonstration Circuit 1954A features the LTC6954, a Low Phase Noise, Triple Output Clock Distribution Divider/ Driver.
There are four options of the DC1954A, one for each version of the LTC6954. Table 1 summarizes the available DC1954A options.
Resources
DC1954A-D
LTC6954-4 Demo Board | Low Phase Noise, Triple Output Clock Distribution Divider/Driver, 3 LVDS/CMOS outputs (Requires DC590 or DC2026)
Product Detail
Demonstration Circuit 1954A features the LTC6954, a Low Phase Noise, Triple Output Clock Distribution Divider/ Driver.
There are four options of the DC1954A, one for each version of the LTC6954. Table 1 summarizes the available DC1954A options.
Resources
DC1954A-B
LTC6954-2 Demo Board | Low Phase Noise, Triple Output Clock Distribution Divider/Driver, 2 LVPECL and 1 LVDS/CMOS outputs (Requires DC590 or DC2026)
Product Detail
Demonstration Circuit 1954A features the LTC6954, a Low Phase Noise, Triple Output Clock Distribution Divider/ Driver.
There are four options of the DC1954A, one for each version of the LTC6954. Table 1 summarizes the available DC1954A options.
Resources
Evaluation Kits4
Tools & Simulations 2
Linduino 3
Linduino
Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.
Linduino code repository on GitHub and instructions on how to use the code.
Code Files
Linduino