353WB3A021R

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Introduction to Oscillators

An oscillator is an electronic device or circuit that produces a continuous non-decaying and repetitive oscillating signal. It can be a sinusoidal signal or a square wave signal. Oscillators are used in a wide range of electronic applications, including generating clocks, enabling cellular communication systems and driving microcontrollers. A distinctive feature of an oscillator is that it can generate a signal without external excitation.

353WB3A021R Application Field and Working Principle

The 353WB3A021R is a digital programmable oscillator manufactured by Intersil, a company specializing in the production of semiconductor components and circuits. It is designed for low phase noise analog signal outputs such as inverted saw Tooth, bi-phase clock, rail-to-rail complementary sine and triangle waveforms. In addition, the device has a coaxial output which is used for GPS related applications. It features an extended range of frequencies, from 1 KHz to 350 MHz, and provides excellent phase noise performance as low as -119 dBc/Hz.

The 353WB3A021R operates with one of two different control input options. Firstly, the user can activate a three-wire serial control mode which allows the selection of the output frequency by sending it via serial control data. Alternatively, the user can use the industry-standard dual-frequency input (DFI) to access the operating frequencies configured by the on-chip programmable logic. The 353WB3A021R also features low-jitter, high-speed CMOS logic to provide a complete and reliable interface to a wide range of applications.

The underlying circuitry of the 353WB3A021R consists of two main components. The first component is the oscillator itself, which is a CMOS differential resonator integrated into the chip. This component is responsible for generating the output signal with a low noise floor and minimal jitter. The second component is the modulator, which provides the control input to the oscillator. It can be used to set the specific frequency of the output signal and to adjust the output waveform. The modulator can be programmed either through the three-wire serial control mode or by using the dual-frequency input.

The 353WB3A021R output is available in three output formats depending on the user’s requirements. The first output format is a buffered analog output where the output signal is directly driven by a low-power buffer amplifier. The second format is a cmos output which allows the user to configure the output signal according to their specific needs. Finally, the third output format is a ground-referenced single-ended output which has a low noise spectrum, making it suitable for sensitive analog signal processing applications.

Conclusion

The Intersil 353WB3A021R is a digital programmable oscillator which offers a range of output formats and frequencies. It can be programmed through either the three-wire serial control mode or by using the dual-frequency input. The device offers excellent phase noise performance as low as -119 dBc/Hz and a wide operating frequency range of 1-350MHz. Suitable for a variety of low phase noise output requirements, the 353WB3A021R is a reliable and efficient oscillator for a wide range of electronic applications.

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