![]() 1/10 2 of a crystal resonator, significantly faster startup possible.ĭue to better holding method of the ceramic element, drive level is not a concern for piezoelectric type resonators. Built-in load capacitors are included in same miniature package. Miniaturized packaging technology results in very small mainstream packages. Good Frequency Accuracy and Good Stability Over Temperature.The power consumption of amplifiers fabricated in CMOS is largely proportional to the operating frequency and can be expressed as a power-dissipation capacitance value.Ĭeramic circuits typically specify larger load capacitance values than crystal circuits, and draw still more current than the crystal circuit using the same amplifier. ![]() The power consumption of discrete component crystal-oscillator circuits is primarily determined by the feedback-amplifier supply current and by the in-circuit capacitance values used. Power consumption is another important consideration of oscillator selection. The majority of clock sources for microcontrollers can be grouped into two types: those based on mechanical resonant devices, such as crystals and ceramics, and those based on electrical phase-shift circuits such as RC (resistor, capacitor) oscillators.Ĭeramic and crystal resonator-based oscillators (mechanical) typically provide very high initial accuracy and a moderately low temperature coefficient.
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