ICS9250BF-28

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ICS9250BF-28 Application Field and Working Principle

The ICS9250BF-28 is a family of clock/timing integrated circuits specifically designed for a broad range of applications. It consists of a low-voltage oscillator, a programmable divider, a voltage-controlled oscillator, a frequency synthesizer and a programmable delay line. The ICS9250BF-28 is designed to enable the design of extremely low-power timing instructions that meet the demands of today’s high-performance applications.

Oscillator Circuit

The ICS9250BF-28 oscillator circuit is designed to provide maximum flexibility to tailor the output frequency to meet the requirements of the application. The oscillator can be driven with a DC voltage (Vcc) or an AC voltage (Vtri). The output frequency is controlled by a programmable divider or a voltage-controlled oscillator (VCO) circuit. There are three reference frequency ranges: 0.5-1MHz, 2-4MHz and 4-8MHz. The frequency range can be further customized with a programmable divider for improved linearity.

Programmable Divider

The programmable divider consists of two segments: an initial division ratio and a division ratio modulus. The initial division ratio consists of a bit-mask register, while the division ratio modulus is a fractional divider. The division ratio modulus can be programmed in 8-bit, 16-bit and 32-bit modes. The output frequency of the division ratio can be adjusted from 0 to 4MHz.

Voltage Controlled Oscillator

The ICS9250BF-28 has a voltage-controlled oscillator (VCO) circuit that can be used to adjust the output frequency by varying the control voltage (Vtri). The VCO can be programmed to a frequency range from 0.5 to 8MHz. The internal reference frequency is adjustable from 0.5 to 4MHz. The VCO output frequency can be programmed in 8-bit, 16-bit and 32-bit modes.

Frequency Synthesizer

The ICS9250BF-28 contains a frequency synthesizer designed to generate periodic waveforms at frequencies above the oscillator\'s normal operating range. This circuit is based on a switched capacitor and a RC-CR filter. The synthesizer can be used to generate frequencies up to 8MHz. The frequency range can be further extended using a programmable delay line.

Programmable Delay Line

The ICS9250BF-28 includes a programmable delay line for use in re-timing signals. The delay line can be programmed in 6-bit, 8-bit and 10-bit modes. The delay line can be used to adjust the timing of the frequency synthesizer or the output of the divider circuit. The delay line can also be used to adjust the output frequency from a simple system clock.

Conclusion

In conclusion, the ICS9250BF-28 is an extremely flexible and versatile clock/timing integrated circuit designed for a wide range of applications. The oscillator circuit, programmable divider, voltage-controlled oscillator, frequency synthesizer and programmable delay line provide the flexibility necessary to meet the needs of today’s high-performance applications.

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