SIT1602BI-23-33S-66.666600D

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Oscillators are defined as devices used in electronics to produce a periodic oscillation or alternation in a voltage or current. Pertaining to such oscillators, SIT1602BI-23-33S-66.666600D is one such example, which sees its use in a variety of applications.

The SIT1602BI-23-33S-66.666600D is a type of voltage-controlled oscillator that operates at a frequency of 66.666600 MHz within a temperature range of -40 to +85 degrees Celsius. Exhibiting fast rising and falling times, the oscillator features a low-phase noise performance, making it ideal in a range of applications. These include telecommunications, military, and commercial avionics, for which the oscillator offers a pull-in range of ± 150 ppm and a hold-in range of ± 75 ppm.

The voltage-controlled oscillator of SIT1602BI-23-33S-66.666600D is offered in an ultra-miniature ceramic package. The package measuring 7.0 x 5.0 x 1.6 mm can be mounted on the PCB board simply by using a T-shape non-solder shield. As an example, the miniature L-Band transponder SIT 1602BI-23-33S-66.666600D requires only +3.3V supply voltage. This characteristic applies to all L-Band SIT1602BI oscillators, offering a highly miniaturized size compared to other competing products in the market.

The working principle of SIT1602BI-23-33S-66.666600D lies in its use of the phase-locked loop (PLL) technique. This technique enables the oscillator to offer a low-jitter and an excellent frequency stability. Comprising of an amplifier, VCO, a divider, a frequency detector, and a loop filter, this PLL operates in a closed loop configuration to generate a frequency, which is proportional to a control voltage and in-phase with a reference frequency. The reference frequency is given to the PLL by a reference signal.

The frequency detector within the PLL transfers the generated frequency back to the amplifier, which then amplifies any gap between the generated frequency and the reference frequency. The amplified output is then given to the VCO, which alters the generated frequency proportional to the input voltage. This output is either increased or decreased to achieve a constant phase comparison to the reference frequency. When the two frequencies match, the frequency detector transfers a null signal to the amplifier, causing the VCO to remain in its current state.

From the working principle of the phase-locked loop, it is clear that SIT1602BI-23-33S-66.666600D oscillator is able to offer low-jitter and an excellent frequency stability. This makes it suitable for a range of applications, particularly those related to telecommunications, military, and commercial avionics. With its small package size and wide operating temperature range, it is possible to utilize the oscillator in small form-factor applications, such as in L-Band transponder products.

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