Oscillators

Oscillators are electronic circuits that use feedback to generate an output signal that oscillates—or cycles—around a central frequency for a desired duration of time. Such electronic circuits are frequently used in applications such as radio communications, radar systems, mass spectrometers, and audio systems. One of the many oscillators available is the 353NB5I250R, a low cost and low power oscillator.

353NB5I250R Application Field

Specified to operate in higher frequencies, the 353NB5I250R oscillator is specifically designed for use in point-to-point communications, Wi-Fi, and other data-transmission applications. This oscillator’s output is also suitable for PMR radios, radio-transceiver AGC signals, and for clock signals. Its superior reliability and stability ensure its suitability for use in production boards and other embedded applications. The 353NB5I250R is an ideal choice for scenarios with limited board space, as it measures only 14.4 mm x 7.7 mm x 4.5 mm, and requires minimal restraint requirements.

353NB5I250R Working Principle and Sample Rates

The 353NB5I250R uses a Positive Voltage Controlled Oscillator (VCXO) to generate an output frequency. It requires a DC supply voltage of +3.0V (±5% due to aging characteristics). The output frequency is based on an internal crystal with a fundamental frequency of 25MHz, and a custom PLL generating a frequency of 250MHz. The 353NB5I250R tuning range is 11MHz to 250MHz with a frequency stability of ±25 ppm max over the entire temperature range of 0～+60℃. The typical start time is less than 6 ms, while its typical turning voltage range is +2.0V～+3.5V.

In its default configuration, the 353NB5I250R has a high frequency of up to 250MHz and can sample at up to 500MS/s. It is also capable of sampling at 1GS/s by disabling the internal comparator. For applications requiring a higher sample rate, the 353NB5I250R can be adjusted to offer a maximum sample rate of 2GS/s. When set up in this way, it is capable of capturing signal detail thoroughly with an effective resolution of 1 nano volt.

Conclusion

The 353NB5I250R oscillator is an ideal low cost and low power solution for a wide variety of applications, including Wi-Fi, data transmission, PMR radios, and AGC signals. It also offers superior reliability and stability necessary for embedding into production boards. With its tuning range from 11MHz to 250MHz and its maximum sampling rate of 2GS/s, the 353NB5I250R can provide an effective resolution of 1 nano volt.