SC Cut Doubly Rotated Quartz Crystal Blanks For Oven Stabilized Oscillators
SC Cut Doubly Rotated Quartz Crystal Blanks For Oven-Stabilized Oscillators
A special cut (Stress Compensated) developed in 1974, is a double-rotated cut (35°15' and 21°54') for oven-stabilized oscillators with low phase noise and good aging characteristics. Less sensitive to mechanical stresses. Has faster warm-up speed, higher Q, better close-in phase noise, less sensitivity to spatial orientation against the vector of gravity, and less sensitivity to vibrations.[53] Its frequency constant is 1.797 MHz⋅mm. Coupled modes are worse than the AT cut, resistance tends to be higher; much more care is required to convert between overtones. Operates at the same frequencies as the AT cut. The frequency-temperature curve is a third order downward parabola with inflection point at 95 °C and much lower temperature sensitivity than the AT cut.
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Orientation |
AT, SC, IT,…, etc |
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Angle Tolerance |
Theta Angle: ±5″, ±10″, ±15″, ±30″, ±1′, ±2′, …, etc. |
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Phi Angle: ±5′, ±10′, ±15′, ±30′, …, etc. |
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Size |
Round (3.0mm～8”)/ Square (1.6x1.6mm～48x48mm or larger)/ SMD (1.2x2.4mm Above) |
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Size Tolerance |
±0.01mm,+/-0.005mm, +/-0.0005mm, according to size |
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Frequency |
1 Mhz up to 54Mhz for AT-Cut Fundamental; Up to 70Mhz by Etching |
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Flat |
Per requested: the flat shall be perpendicular to X axis within ±10 deg |
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Surface |
#1000(9u); #2000(7u); #3000(5u); #4000(3u) (SiC); Polished(Cerium Oxide)& etched Std |
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Overtone |
Fundamental; Third Overtone (3rd); Fifth Overtone (5th) |
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Dioptric |
Plano-Convex: 0.5 dioptric～10 dioptric Bi-Convex: 10 dioptric～15 dioptric |
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Material |
Cultured Quartz Crystal |
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Q-Value |
Min 1.8x10^6, 2.4x10^6 to 3.0x10^6 IEC standards |
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ECD |
Max 2 /c㎡, 10/c㎡, Max 30/c㎡, Max 100/c㎡, Max 300/c㎡; Swept Quartz |
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Inclusions |
Ia, Ib, I, II, III Grades |
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Swept |
Z bar, Y bar, Or Swept quartz |
Acceptance Check
- The product is fragile. We have adequately packed it and labeled it fragile. We deliver through excellent domestic and international express companies to ensure transportation quality.
- After receiving the goods, please handle with care and check whether the outer carton is in good condition. Carefully open the outer carton and check whether the packing boxes are in alignment. Take a picture before you take them out.
- Please open the vacuum package in a clean room when the products are to be applied.
- If the products are found damaged during courier, please take a picture or record a video immediately. DO NOT take the damaged products out of the packaging box! Contact us immediately and we will solve the problem well.
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