LTC6909
PRODUCTION1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation
- Part Models
- 6
- 1ku List Price
- Starting From $3.10
Part Details
- 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
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
Documentation
Data Sheet 1
Reliability Data 1
User Guide 1
Technical Articles 3
Product Selector Card 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 |
|---|---|---|---|
| LTC6909CMS#PBF | 16-Lead MSOP | ||
| LTC6909CMS#TRPBF | 16-Lead MSOP | ||
| LTC6909HMS#PBF | 16-Lead MSOP | ||
| LTC6909HMS#TRPBF | 16-Lead MSOP | ||
| LTC6909IMS#PBF | 16-Lead MSOP | ||
| LTC6909IMS#TRPBF | 16-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
| No Match Found | ||
|
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 | |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Silicon Oscillators 1 | ||
| LTC6908 | Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation | |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC6909
OscCalc Silicon Oscillator Selection & Synthesis Tool
OscCalc is a quick and easy tool to help you find the right silicon oscillator for your application.
Open ToolLTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LTC6909 Demo Board