SIT9005ACU2D-25NN

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Programmable Oscillators

Programmable oscillators are versatile electronic components capable of producing a wide range of frequencies, from ultra-low to high-frequency, many of which can be programmed or adjusted. The SIT9005ACU2D-25NN is a high-performance, low-power programmable oscillator with a minimum operating frequency of 25 MHz and a maximum operating frequency of 900 MHz.

This product provides outstanding frequency stability, with a frequency accuracy of 0.1 PPM and phase noise of -165dBc/Hz. The SIT9005ACU2D-25NN operates at a low power supply voltage range of 1.7-3.6V and is supplied in a tiny 5mm x 7mm SMD package. It has an extended temperature range of -40°C to +105°C and is ideal for low-power, consumer applications such as MP3 players and portable data devices.

Application Field

The SIT9005ACU2D-25NN offers a wide range of applications, including consumer electronics, instrumentation, industrial control, telecommunication, and automotive. This product can be used as a clock source in Mobile communication control system (WiMAX and 3G cellular base station), consumer electronics (Bluetooth, WINCE, USB, etc.), medical electronics (portable patient monitoring instrument, endoscope camera) and multimedia system.

The SIT9005ACU2D-25NN also supports multi-channel synchronization and phase-locking, providing an ideal cost-effective solution for frequency-agile application with high requirement on frequency accuracy and phase-noise performance. It is therefore well-suited for frequency-agile application such as communication systems, phase-lock loop systems, step-lock loop systems and time division multiplexing systems.

Working Principle

The SIT9005ACU2D-25NN uses a low-power CMOS process, allowing for low supply voltage and low power consumption. The output frequency is programmed via a 3-wire serial interface (SPI) or I2C digital interface, which can be programmed with a 8-bit or 10-bit binary code value. The operating temperature range is -40 °C to + 105 °C. This device offers low phase noise of -165dBc/Hz and wide frequency range from 25MHz to 900MHz.

The programmable oscillator\'s output can be set via a SPI or I2C digital interface. The internal oscillator circuit is designed to keep the output frequency within 0.1 PPM accuracy over the total supply voltage range and operating temperature range. In addition, the device provides an on-board trim-cap that allows for a frequency adjustment range of ±20 PPM.

The output frequency becomes stable and reaches its predetermined value within 10µs after power-on, providing an ideal solution for applications that require instantaneous frequency switching. The device also features power down and reset functions, to enable improved system efficiency.

Conclusion

The SIT9005ACU2D-25NN is a high-performance, low-power programmable oscillator that produces a wide frequency range of 25MHz to 900MHz with a frequency accuracy of 0.1PPM, excellent phase noise of -165dBc/Hz, low power supply voltage range of 1.7–3.6V and extended temperature range of -40 °C to + 105 °C. This device is suitable for a wide range of applications in consumer electronics, industrial control, telecommunication, and automotive, and is capable of multi-channel synchronization and phase-locking.

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