PL902167USY

PL902167USY Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

The PL902167USY series is a high performance oscillating circuit designed to generate a specific frequency output. The circuit achieves excellent accuracy and stability with an oscillator element composed of a quartz crystal. It is also used for communications, measurement and control equipment, in industrial, consumer and automotive applications.

A clock generator using the PL902167USY functions as a low-cost frequency reference for systems and instruments. This device has the capability to synthesize frequency outputs on the order of 1 MHz to 50 MHz. This frequency is generated through a combination of some inductive elements, capacitance, resistors and the quartz crystal.

The basic principle of operation involves the quartz crystal to create an oscillator that produces an oscillating output signal. The oscillator output is fed into an active filter for frequency selection and amplification. This filter, called a phase-locked loop (PLL), is locked, or synchronized, to the oscillating signal of the quartz crystal. The output from the filter is then sent to the frequency divider and amplifier stage to adjust the oscillator frequency and provide the output signal.

The PLL works by comparing the incoming and the loop frequencies to calculate an error signal which is sent to the oscillator control circuit for adjustment. This system adjusts the control voltage, and thus the frequency of the oscillator, until the error signal is sufficiently reduced. When the error signal reaches its minimum level, it means the output of the oscillator matches the PLL input frequency.

The PL902167USY offers excellent frequency stability characteristics and good noise immunity. The output frequency accuracy is typically maintained over a temperature range of -35°C to 85°C. The device also features a wide input voltage range of 2.7V to 5.5V, and has a maximum output current of 500mA. This device can operate at temperatures ranging from -20°C to 70°C.

The PL902167USY is well suited for applications such as test and measurement equipment, radio frequency instrumentation, communication devices, industrial process control systems and automotive subsystems. It is a cost effective and very reliable solution for small precision system clock generation.