Programmable Oscillator

Description: A programmable oscillator is an electronic device that generates a precise frequency signal, where the output frequency can be adjusted or programmed via digital inputs, I2C, SPI, or software.

• Type: Crystal-less or MEMS-based
• Control Interface: I2C, SPI, or proprietary serial
• Frequency Range: Typically 1 kHz to 200+ MHz
• Accuracy: ±10 to ±100 ppm (depending on model)
• Common Use Cases: Clock generation for FPGAs, microcontrollers, communication systems
• Example ICs:
  • Silicon Labs Si5351 (I2C, up to 200 MHz, multiple outputs)
  • TI LMK61E2 (programmable VCXO)
  • Analog Devices AD9850 (DDS-based, up to 40 MHz)

Note: Ideal for applications requiring flexible clock sources without changing physical crystals.