LTC6903

PRODUCTION

LTC6903

1kHz – 68MHz Serial Port Programmable Oscillator

PRODUCTION

A Microcontroller Controlling Its Clock slide

LTC6903 Frequency Error Distribution slide

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Part Models 6

1ku List Price Starting From $2.72

Features

1kHz to 68MHz Square Wave Output
0.5% (Typ) Initial Frequency Accuracy
Frequency Error <1.1% Over All Settings
10ppm/°C Typical Frequency Drift Over Temperature
0.1% Resolution
1.7mA Typical Supply Current (f < 1MHz, V_S = 2.7V)
2.7V to 5.5V Single Supply Operation
Jitter <0.4% Typical 1kHz to 8MHz
Easy to Use SPI (LTC6903) or I²C (LTC6904) Serial Interface
Output Enable Pin
–55°C to 125°C Operation
MS8 Package

Additional Details

The LTC6903/LTC6904 are low power self contained digital frequency sources providing a precision frequency from 1kHz to 68MHz, set through a serial port. The LTC6903/ LTC6904 require no external components other than a power supply bypass capacitor, and they operate over a single wide supply range of 2.7V to 5.5V.

The LTC6903/LTC6904 feature a proprietary feedback loop that linearizes the relationship between digital control setting and frequency, resulting in a very simple frequency setting equation:

ltc6903-6904-eq1

where OCT is a 4-bit digital code and DAC is a 10-bit digital code.

The LTC6903 is controlled by a convenient SPI compatible serial interface. The LTC6904 uses an industry standard I²C compatible interface.

Applications

Precision Digitally Controlled Oscillator
Power Management
Direct Digital Frequency Synthesis (DDS) Replacement
Replacement for DAC and VCO
Switched Capacitor Filter Clock

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 6

1ku List Price Starting From $2.72

Technical Documents 3

LTC6903/LTC6904: 1kHz – 68MHz Serial Port Programmable Oscillator Data Sheet 03/05/2012

R494 Reliability Data 03/22/2018

Digital Programmable Oscillator Is Smaller, Sturdier and More Versatile than Crystal Oscillators 12/01/2003

Reference Materials 3

MIKROE-5250, Click Board,V to Hz Click

MIKROE-4413, Click Board, Clock Gen 5 Click

Silicon Oscillators 11/17/2015

Design Resources 6

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
LTC6903CMS8#PBF	8-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC6903CMS8#TRPBF	8-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC6903HMS8#PBF	8-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC6903HMS8#TRPBF	8-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC6903IMS8#PBF	8-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC6903IMS8#TRPBF	8-Lead MSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys