LTC6902
Multiphase Oscillator with Spread Spectrum Frequency Modulation
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Features
- 2-, 3- or 4-Phase Outputs
- Optional Spread Spectrum Frequency Modulation for Improved EMC Performance
- 5kHz to 20MHz Frequency Range
- One External Resistor Sets the Frequency
- One External Resistor Sets Percent Frequency Spreading
- 400µA Typical Supply Current, VS = 3V, 1MHz
- Frequency Error < 1.5% Max, 5kHz to 10MHz (TA = 25°C)
- Frequency Error < 2% Max, 5kHz to 10MHz (TA = 0°C to 70°C)
- ±40ppm/°C Temperature Stability
- Fast Start-Up Time: 50µs to 1.5ms
- 100Ω CMOS Output Driver
- Operates from a Single 2.7V to 5.5V Supply
- Available in 10-Lead MS Package
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The LTC6902 is a precision, low power and easy-to-use oscillator that provides multiphase outputs in a small package. The oscillator frequency is set by a single external resistor (RSET). The LTC6902 also provides an optional spread spectrum frequency modulation (SSFM) capability that can be activated and controlled by an additional external resistor (RMOD).
The LTC6902's master oscillator is controlled by the RSET resistor and has a range of 100kHz and 20MHz. In order to accommodate a wider output frequency range, a programmable divider (divide by 1, 10 or 100) is included. The integrated programmable multiphase circuit provides either 2-, 3- or 4-phase waveforms.
The LTC6902's SSFM capability modulates the oscillator's frequency by a pseudorandom noise (PRN) signal to spread the oscillator's energy over a wide frequency band. This spreading decreases the peak electromagnetic radiation level and improves electromagnetic compatibility (EMC) performance. The amount of frequency spreading is programmable by a single additional external resistor (RMOD) and is disabled by grounding the MOD pin.
Applications
- Switching Power Supply Clock Reference
- Portable and Battery-Powered Equipment
- PDAs
- Cell Phones
- Clocking Switched Capacitor Filters
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Submit your question below and we will return the best answer from ADI’s knowledge database:
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LTC6902
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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.
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- LTC6902CMS#PBF
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10-Lead MSOP
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SamacSys
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10-Lead MSOP
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
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SamacSys
- LTC6902IMS#PBF
- Pin/Package Drawing
-
10-Lead MSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- LTC6902IMS#TRPBF
- Pin/Package Drawing
-
10-Lead MSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
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SamacSys
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Part Models
Product Lifecycle
PCN
Feb 4, 2020
- 20_0130
Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC
LTC6902CMS#PBF
PRODUCTION
LTC6902CMS#TRPBF
PRODUCTION
LTC6902IMS#PBF
PRODUCTION
LTC6902IMS#TRPBF
PRODUCTION
Filter by Model
Part Models
Product Lifecycle
PCN
Feb 4, 2020
- 20_0130
Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC
LTC6902CMS#PBF
PRODUCTION
LTC6902CMS#TRPBF
PRODUCTION
LTC6902IMS#PBF
PRODUCTION
LTC6902IMS#TRPBF
PRODUCTION
Software & Part Ecosystem
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
Reference Designs 9
NXP NOVPED iMX6 QP
NXP iMX6 Platform EVK Hardware Verified Design for IO and Robust Power Supply
Circuits from the lab
Info:Circuits from the lab
Features and Benefits
- Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
- Our reference designs are supported by an intuitive design tool set and IP
- Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
Altera Audio Video Development Kit, Stratix IV GX Edition
Circuits from the lab
Info:Circuits from the lab
Features and Benefits
- Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
- Our reference designs are supported by an intuitive design tool set and IP
- Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
Part Used 15
Xilinx Kintex®-7 PCI Express Development Board
Circuits from the lab
Info:Circuits from the lab
Features and Benefits
- Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
- Our reference designs are supported by an intuitive design tool set and IP
- Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
HTG-Z922: Xilinx ZYNQ® UltraScale+™ MPSoC PCI Express Development Platform
Circuits from the lab
Info:Circuits from the lab
Features and Benefits
The HTG-Z922 provides access to large FPGA gate densities, wide range of I/O and expandable DDR4 memory for variety of different programmable applications. It is populated with the Xilinx Zynq Ultrascale+ ZU17-2 or ZU19-2 FPGA. Analog Devices power solution on this platform is fully validated to meet the requirements of Xilinx Zynq Ultrascale+ FPGAs to ensure a robust power delivery solution.
DC/DC μModule regulators are used on the HTG-Z922 to power Xilinx FPGA and/or SoC rails as well as other system rails. These regulators are highly integrated solutions with built in controller, power FETs, inductors, and capacitors that simplify layout and provide robust power delivery performance.
We provide supporting documentation including power schematics, layout, LTpowerPlanner and applicable LTpowerPlay configuration files to enable you to validate the power solution for your application seamlessly.
Part Used 4
HTG-910: Xilinx Virtex UltraScale+™ Low-Profile PCI Express Development Platform
Circuits from the lab
Info:Circuits from the lab
Features and Benefits
The HTG-910 is low profile network card that provides access to eight lanes of PCI Express. It is populated with the Xilinx Zynq Virtex Ultrascale VU5P, VU9P, VU13P or Ultrascale VU190 FPGA. Analog Devices power solution on this platform is fully validated to meet the requirements of Xilinx Zynq Virtex Ultrascale FPGAs to ensure a robust power delivery solution.
DC/DC μModule regulators are used on the HTG-910 to power Xilinx FPGA and/or SoC rails as well as other system rails. These regulators are highly integrated solutions with built in controller, power FETs, inductors, and capacitors that simplify layout and provide robust power delivery performance.
We provide supporting documentation including power schematics, layout, LTpowerPlanner and applicable LTpowerPlay configuration files to enable you to validate the power solution for your application seamlessly.
Part Used 5
HTG-937: Xilinx Virtex UltraScale+ ™ VU37P/VU47P HBM Development Board
Circuits from the lab
Info:Circuits from the lab
Features and Benefits
The HTG-937 provides access to large FPGA gate density and 8GB/16GB of high bandwidth memory. It is populated with the Xilinx Zynq Virtex Ultrascale VU37P, or VU47P. Analog Devices power solution on this platform is fully validated to meet the requirements of Xilinx Zynq Virtex Ultrascale FPGAs to ensure a robust power delivery solution.
DC/DC μModule regulators are used on the HTG-937 to power Xilinx FPGA and/or SoC rails as well as other system rails. These regulators are highly integrated solutions with built in controller, power FETs, inductors, and capacitors that simplify layout and provide robust power delivery performance.
We provide supporting documentation including power schematics, layout, LTpowerPlanner and applicable LTpowerPlay configuration files to enable you to validate the power solution for your application seamlessly.
Altera Stratix IV GX FPGA Development Kit
Circuits from the lab
Info:Circuits from the lab
Features and Benefits
- Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
- Our reference designs are supported by an intuitive design tool set and IP
- Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
Part Used 14
Terasic DE4 Development and Education Board
Circuits from the lab
Info:Circuits from the lab
Features and Benefits
- Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
- Our reference designs are supported by an intuitive design tool set and IP
- Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
Part Used 6
Altera Stratix IV E FPGA Development Kit
Circuits from the lab
Info:Circuits from the lab
Features and Benefits
- Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
- Our reference designs are supported by an intuitive design tool set and IP
- Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
Part Used 5
Reference Designs9
NXP NOVPED iMX6 QP
NXP iMX6 Platform EVK Hardware Verified Design for IO and Robust Power Supply
Altera Audio Video Development Kit, Stratix IV GX Edition
Xilinx Kintex®-7 PCI Express Development Board
HTG-Z922: Xilinx ZYNQ® UltraScale+™ MPSoC PCI Express Development Platform
HTG-910: Xilinx Virtex UltraScale+™ Low-Profile PCI Express Development Platform
HTG-937: Xilinx Virtex UltraScale+ ™ VU37P/VU47P HBM Development Board
Altera Stratix IV GX FPGA Development Kit
Terasic DE4 Development and Education Board
Altera Stratix IV E FPGA Development Kit
