Suntan Quartz Crystal Glossary of Terms

August 20, 2015 Views
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Suntan Technology Company Limited
---All Kinds of Capacitors

Nominal frequency:
The specified center frequency of the crystal.  Unit of frequency is Hertz (Hz).  Quartz crystals are specified in kHz or MHz
 
Operating temperature: 
The minimum and maximum temperatures within which crystal unit operates under specified conditions.
 
Storage temperature:
The minimum and maximum temperatures that the crystal unit can be safely stored.
 
Load capacitance: 
Load capacitance (CL) is the amount of capacitance that the oscillator exhibits when looking into the circuit through the two crystal terminals.  
Load capacitance needs to be specified when the crystal is used in a parallel mode.

More details please check : http://www.suntan.com.hk/Quartz-Crystal/

Suntan Crystal Oscillator Glossary of Terms

August 6, 2015 Views
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Suntan Technology Company Limited
---All Kinds of Capacitors

• Frequency: The periodic repetition of an event within a unit of time. In an electrical circuit, the number of waves that pass a given point in one second. The number of times a resonator plate oscillates or vibrates in one second. The nominal or desired frequency specified by a customer. 
 
• Frequency Stability: The allowable deviation, in parts per million (PPM), over a specified temperature range. Deviation is referenced to the measured frequency at +25℃. 
 
• Frequency Tolerance: The allowable deviation from nominal, in parts per million (PPM), at a specific temperature, usually +25℃. 
 
• Package Size : Physical holder of the crystal unit. 
 
• Holder: The complete housing for a quartz resonator plate. The holder includes the base and cover. 
 
• Supply Voltage: The specified Suply Voltage is dependent on the Resonance Mode required in the application. Generally is 3.3V or 5V. 
 
• Temperature Range: Temperature range over which the crystal's characteristics are guaranteed. 
 
• Aging: A change in the frequency and/or the resistance of a quartz crystal unit with the passage of time. 
 
• Hz: The abbreviation of the word "Hertz." 
 
• Hertz: The basic unit of measurement of frequency, "Hertz" replaces the term "cycle per second". Used to denote one complete occurrence of an event in one second. 
 
• KHz: The abbreviation for "kiloHertz," used to describe the frequency of a crystal or oscillator in terms of thousands of Hertz (cycles per second). A frequency specified as "10.0 kHz" would be understood as being a frequency of 10,000 Hertz (cycles per second). A frequency specified as "10,000 kHz" would be understood as being a frequency of 10,000,000 Hertz (cycles per second). 
 
• MHz: The abbreviation for "MegaHertz," used to describe the frequency of a crystal or oscillator in terms of millions of Hertz (cycles per second). A frequency specified as "10.0 MHz" would be understood as being a frequency of 10,000,000 Hertz (cycles per second).

For more details please check : http://www.suntan.com.hk/Quartz-Crystal/
 

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