LTC6904 - 1kHz - 68MHz Serial Port Programmable Oscillator

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:

  • 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, VS = 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
Typical Application
LTC6904 Typical Application
LTC6904 Typical Application
  • Precision Digitally Controlled Oscillator
  • Power Management
  • Direct Digital Frequency Synthesis (DDS) Replacement
  • Replacement for DAC and VCO
  • Switched Capacitor Filter Clock
LTC6904 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
Demo Boards
Part NumberDescriptionPrice
DC726B-BLTC6904 Demo Board | 1kHz to 68MHz Serial Port Programmable Oscillator (req DC2026)$100.00
Companion Boards
Part NumberDescriptionPrice
DC2026CLinduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform$75.00
DC590BIsolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards$50.00
Reliability Data
Product Selector Card
LT Journal
Software and Simulation
CAD Symbol
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LTC6903/LTC6904 - 1kHz - 68MHz Serial Port Programmable Oscillator
R494 Reliability Data
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LTC6904 Footprints and Symbols
LTC6904 - DC726B_B Linduino.INO File
LTC6904 - Linduino Header File
LTC6904 - Linduino.CPP File