深圳港中兴电子有限公司(gzx)
specification of crystal
a. electrical performance
1. frequency (标准频率) 32.768khz
2. holder type(盒型) 4.9*1.8*0.8
3. frequency tolerance(室温频差) ±10ppm at 25℃±3℃
4. equivalent resistance(阻抗) 35kwmax.
5. operation temperature(工作温度) -40℃~+85℃
6. parabolic curvature constant(温度变化值) -0.035ppm /℃2
7. loading capacitance(负载电容) 12.5pf
8. drive level (激励功率) 1mw
9. shunt capacitance(静电容) 0.85pf max.
10. insulation resistance(绝缘电阻) min. 100mwat 100v dc
11. aging(年老化率) ±3 ppm per year max.
12. mode of oscillation(振动模式) fundamental
13. test impedance meter(测试仪器) saunders 150d
14. air tightness test(绝缘测试) no air bubble are visible when
the crystal are fully in 90℃
±3℃hot water for 3 minutes.
15. resistance to shock(跌落试验)
dropped 3 times, without adding any unnatural force onto a hard wooden plate
from a height 30 cm frequency shall not change more than ±5ppm.
本产品的加工定制是是,品牌是KDS,型号是DST520,种类是晶振,标称频率是32.768(MHz),调整频差是32.768(MHz),温度频差是30(MHz),总频差是32.768(MHz),负载电容是12.5(pF),负载谐振电阻是30(Ω),激励电平是20(mW),基准温度是85(℃),插入损耗是45(dB),阻带衰减是20(dB),输入阻抗是50(kΩ),输出阻抗是20(kΩ),一级是