LTC6909
1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation
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Features
- 1-, 2-, 3-, 4-, 5-, 6-, 7- or 8-Phase Outputs
- One External Resistor Sets the Output Frequency from 12.5kHz to 6.67MHz
- Optional Spread Spectrum Frequency for Improved EMI Performance
- ±10% Frequency Spreading
- Outputs Can Be Held Low or Floated (Hi-Z)
- Three Spread Spectrum Modulation Rates fOUT/16, fOUT/32 and fOUT/64
- 400μA Supply Current
- Operates from a Single 2.7V to 5.5V Supply
- Fast Start-Up Time
- First Cycle Accurate
- Outputs Are High Impedance Until Frequency Settles
- MS16 Package
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The LTC6909 is an easy to use precision oscillator that can provide 1-, 2-, 3-, 4-, 5-, 6-, 7- or 8-phase synchronized outputs. The LTC6909 also offers spread spectrum frequency modulation (SSFM), which can be enabled to improve electromagnetic compatibility (EMC) performance.
Eight separate outputs provide up to eight rail-to-rail, 50% duty cycle clock signals. Using three logic inputs, the outputs are configured for phase separation, ranging from 45° to 120° (three to eight phases). The clock outputs can also be held low or configured for Hi-Z. A single resistor, combined with the phase configuration, sets the output frequency, based on the following formula:
The LTC6909 can be used in applications requiring only one or two output phases. Alternatively, the LTC6908 family of parts provides the same two output signals but in a smaller SOT-23 or 2mm × 3mm DFN package. The LTC6908-1 provides complimentary (180°) outputs while the LTC6908-2 provides quadrature (90°) outputs.
Applications
- Synchronizing Multiple Switching Power Supplies
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LTC6909
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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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16-Lead MSOP
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16-Lead MSOP
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16-Lead MSOP
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| LTC6909IMS#PBF |
16-Lead MSOP
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| LTC6909IMS#TRPBF |
16-Lead MSOP
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- LTC6909CMS#PBF
- Pin/Package Drawing
-
16-Lead MSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
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SamacSys
- LTC6909CMS#TRPBF
- Pin/Package Drawing
-
16-Lead MSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- LTC6909HMS#PBF
- Pin/Package Drawing
-
16-Lead MSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- LTC6909HMS#TRPBF
- Pin/Package Drawing
-
16-Lead MSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- LTC6909IMS#PBF
- Pin/Package Drawing
-
16-Lead MSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- LTC6909IMS#TRPBF
- Pin/Package Drawing
-
16-Lead MSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
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PCN
Jun 5, 2024
- 24_0003
Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
LTC6909CMS#PBF
PRODUCTION
LTC6909CMS#TRPBF
PRODUCTION
LTC6909HMS#PBF
PRODUCTION
LTC6909HMS#TRPBF
PRODUCTION
LTC6909IMS#PBF
PRODUCTION
LTC6909IMS#TRPBF
PRODUCTION
Feb 4, 2020
- 20_0132
Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC
LTC6909CMS#PBF
PRODUCTION
LTC6909CMS#TRPBF
PRODUCTION
LTC6909HMS#PBF
PRODUCTION
LTC6909HMS#TRPBF
PRODUCTION
LTC6909IMS#PBF
PRODUCTION
LTC6909IMS#TRPBF
PRODUCTION
Filter by Model
Part Models
Product Lifecycle
PCN
Jun 5, 2024
- 24_0003
Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
LTC6909CMS#PBF
PRODUCTION
LTC6909CMS#TRPBF
PRODUCTION
LTC6909HMS#PBF
PRODUCTION
LTC6909HMS#TRPBF
PRODUCTION
LTC6909IMS#PBF
PRODUCTION
LTC6909IMS#TRPBF
PRODUCTION
Feb 4, 2020
- 20_0132
Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC
LTC6909CMS#PBF
PRODUCTION
LTC6909CMS#TRPBF
PRODUCTION
LTC6909HMS#PBF
PRODUCTION
LTC6909HMS#TRPBF
PRODUCTION
LTC6909IMS#PBF
PRODUCTION
LTC6909IMS#TRPBF
PRODUCTION
Software & Part Ecosystem
| Parts | Product Life Cycle | Description | ||
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Silicon Oscillators1 |
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Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation |
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Evaluation Kits 1
DC1446A
LTC6909 Demo Board
Product Detail
DC1446A: Demo Board for the LTC6909 1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation.
Resources
Evaluation Kits1
Tools & Simulations 2
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Lt Spice
OscCalc Silicon Oscillator Selection & Synthesis Tool
