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| 型号： | SMAW200-NND |
| 厂商： | YEONHO Electronics Co., Ltd. |
| 英文描述： | 2.00mm PITCH CONNECTOR |
| 中文描述： | 2.00毫米间距连接器 |
| 文件页数： | 17/24页 |
| 文件大小： | 436K |
| 代理商： | SMAW200-NND |
Si8440/1/2
Rev. 0.3
17
4.4. RF Immunity and Common Mode Transient Immunity
The Si8440 family has very high common mode transient immunity while transmitting data. This is typically
measured by applying a square pulse with very fast rise/fall times between the isolated grounds. Measurements
show no failures up to 30 kV/μs. During a high surge event the output may glitch low for up to 20–30 ns, but the
output corrects immediately after the surge event.
The Si844x family passes the industrial requirements of CISPR24 for RF immunity of 3 V/m using an unshielded
evaluation board. As shown in Figure 15, the isolated ground planes form a parasitic dipole antenna, while
Figure 16 shows the RMS common mode voltage versus frequency above which the Si844x becomes susceptible
to data corruption. To avoid compromising data, care must be taken to keep RF common-mode voltage below the
envelope specified in Figure 16. The PCB should be laid-out to not act as an efficient antenna for the RF frequency
of interest. RF susceptibility is also significantly reduced when the end system is housed in a metal enclosure, or
otherwise shielded.
Figure 15. Dipole Antenna
Figure 16. RMS Common Mode Voltage vs. Frequency
Isolator
GND1
GND2
Dipole
Antenna
0
1
2
3
4
5
500
1000
1500
2000
Frequency (MHz)
R
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| SMAW250 | 制造商:YEONHO 制造商全称:YEONHO ELECTRONICS 功能描述:2.50mm PITCH CONNECTOR |
| SMAW250-02P | 制造商:YEONHO 制造商全称:YEONHO ELECTRONICS 功能描述:2.50mm PITCH CONNECTOR |
| SMAW250-03P | 制造商:YEONHO 制造商全称:YEONHO ELECTRONICS 功能描述:2.50mm PITCH CONNECTOR |
| SMAW250-04P | 制造商:YEONHO 制造商全称:YEONHO ELECTRONICS 功能描述:2.50mm PITCH CONNECTOR |
| SMAW250-04V | 制造商:YEONHO 制造商全称:YEONHO ELECTRONICS 功能描述:2.50mm PITCH CONNECTOR |
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