SI5338M-B07003-GMR

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A clock/timing circuit is an important component of any system, providing a regulated and accurate timing source. The SI5338M-B07003-GMR is a highly specialized clock/timing circuit designed for specific applications such as data acquisition systems, frequency synthesizers, and microprocessor systems.

The SI5338M-B07003-GMR is a professional-grade PLL clock generator specifically designed for applications in communications, navigation, industrial automation, medical equipment, avionics, and military systems. It offers highly precise clock frequencies from ≤ 800 MHz to ≥ 2.5 GHz and versatility in controlling multiple outputs. With ultra-low jitter as low as 2 ps rms, it delivers reliable clock performance and stability across a wide range of temperatures.

The SI5338M-B07003-GMR has three low jitter outputs: one differential LVDS output and two PECL outputs. It also offers two selectable input frequencies and slew rate control for optimized performance. This capabilities make the SI5338M-B07003-GMR ideal for high-speed serial communications, medical imaging, deep-space probes, aerospace systems, and test instrumentation.

The SI5338M-B07003-GMR operates by first locking onto an external reference clock signal, supplied through a programmable frequency. A programmable N divider circuit allows user to select the output frequency ratio, while a dual-modulus prescaler allows the user to select different frequency divide ratios. The PLL circuit acts as a low-pass filter, selecting the highest amplitude harmonic and suppressing other higher-order signals.

A voltage-controlled oscillator (VCO) is then used to generate an output signal with a controlled frequency proportional to the applied VCO control voltage. The VCO is buffered and the AC coupled to the output lines. An internal frequency synthesizer generates a preset number of frequencies at which the VCO is set. A phase frequency detector is then used to sense the phase difference between the PLL’s reference clock signal and the output signal of the VCO. If the phase difference is outside of the specified limit, the PLL adjusts the VCO control voltage to move the VCO frequency to the desired frequency.

The SI5338M-B07003-GMR has an external resistor or a control voltage applied to the PLL to adjust the output frequency range and stability. For example, the VCO can be tuned with a voltage applied to the REFIN pin or with a resistor connected to the REFINH pin. The PLL also has dual switching-frequency multipliers to generate a wide range of frequencies with minimal phase noise.

The SI5338M-B07003-GMR also offers a host of versatile features, including squelch control, spread-spectrum clocking, adjustable charge pumps, and digital phase-lock loop (DPLL) reset options. A precision phase detector with wide input frequency range facilitates synchronous phase locking with stable performance even in the presence of large pulse disturbances.

The SI5338M-B07003-GMR is an excellent choice for a wide variety of applications, from high-speed data acquisition systems to frequency synthesizers and microprocessor systems. Its highly precise clock speeds and comprehensive features make it an ideal choice for reliability and accuracy in a wide range of applications.

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