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CSTLS33M8X51-B0 Datasheet(PDF) 4 Page - Murata Manufacturing Co., Ltd. |
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CSTLS33M8X51-B0 Datasheet(HTML) 4 Page - Murata Manufacturing Co., Ltd. |
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4 / 32 page  2 Note • Please read rating and CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc. • This catalog has only typical specifications because there is no space for detailed specifications. Therefore, please review our product specifications or consult the approval sheet for product specifications before ordering. 1 Characteristics and Types of CERALOCK® 1. General Characteristics of CERALOCK® Ceramic resonators use the mechanical resonance of piezoelectric ceramics. (Generally, lead zirconium titanate: PZT.) The oscillation mode varies with resonant frequency. The table on the right shows this relationship. As a resonator device, quartz crystal is well-known. RC oscillation circuits and LC oscillation circuits are also used to produce electrical resonance. The following are the characteristics of CERALOCK®. ① High stability of oscillation frequency: Oscillation frequency stability is between that of the quartz crystal and LC or RC oscillation circuits. The temperature coefficient of quartz crystal is 10–6/°C maximum and approximately 10–3 to 10–4/°C for LC or RC oscillation circuits. For comparison these, it is 10–5/°C at –20 to +80°C for ceramic resonators. ② Small configuration and light weight: The ceramic resonator is half the size of popular quartz crystals. ③ Low price, non-adjustment: CERALOCK® is mass produced, resulting in low cost and high stability. Unlike RC or LC circuits, ceramic resonators use mechanical resonance. This means it is not basically affected by external circuits or by the fluctuation of the supply voltage. Highly stable oscillation circuits can therefore be made without the need of adjustment. The table briefly describes the characteristics of various oscillator elements. 1 ■ Vibration Mode and Frequency Range Frequency (Hz) Vibration Mode 1 Flexural mode 2 Length mode 3 Area expansion mode 4 Radius vibration 5 Shear thickness mode 6 Thickness expansion mode 7 Surface acoustic wave 1k 10k 100k 1M 10M 100M 1G ■ Characteristics of Various Oscillator Elements Name Symbol Price Size Adjust- ment Oscillation Frequency Initial Tolerance Long-term Stability LC lower cost Big Required ±2.0% Fair [Note] : ←̶→ show the direction of vibration CR lower cost Small Required ±2.0% Fair Quartz Crystal Expen- sive Big Not required ±0.001% Excellent Ceramic Resonator Inexpen- sive Small Not required ±0.5% Excellent P17E.pdf 2012.10.31 |
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