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Crystal Technical Reference

Technical

Crystal Technical Reference

Quartz Crystal: A circuit element having a very stable oscillation characteristic composed of quartz.

Holder: The package that the crystal is enclosed within.

Mode: A crystal operates in either a series or parallel mode.

Series Mode: The crystal appears resistive in the circuit when operating at series resonance.

Parallel Mode: The crystal appears inductive in the circuit when operating at parallel resonance.

Calibration Tolerance: The frequency of the crystal at a specified temperature (typically +25°C).

Temperature Stability: The frequency deviation of the crystal over the operating temperature range.

Aging: The frequency change which results from permanent changes in the crystal over time.

Load Capacitance: The specified capacitance of a crystal that a circuit must be for the crystal to be on frequency.

Motional Capacitance: The parameter that affects the ability of the crystal to change frequency with changes in load capacitance.

Equivalent Series Resistance (ESR): The resistance of the crystal with a series load capacitance.

Drive Level: The measure of power dissipated within the crystal.

Crystal Cut: The properties of a crystal are very dependent upon the way that the crystal is cut with reference to it's internal crystalline planes.

Quartz Crystal Equivalent Circuit

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