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ADM202EARWZ-REEL 参数 Datasheet PDF下载

ADM202EARWZ-REEL图片预览
型号: ADM202EARWZ-REEL
PDF下载: 下载PDF文件 查看货源
内容描述: EMI / EMC兼容, ±15千伏ESD保护的RS - 232线路驱动器/接收器 [EMI/EMC-Compliant, +-15 kV, ESD-Protected RS-232 Line Drivers/Receivers]
分类和应用: 驱动器
文件页数/大小: 16 页 / 245 K
品牌: ADI [ ADI ]
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ASM202E/ASM±±8±A  
R1  
R2  
HIGH  
ESD TESTING (IEC1000-4-2)  
VOLTAGE  
GENERATOR  
DEVICE  
UNDER TEST  
IEC1000-4-2 (previously 801-2) specifies compliance testing  
using two coupling methods, contact discharge and air-gap  
discharge. Contact discharge calls for a direct connection to the  
unit being tested. Air-gap discharge uses a higher test voltage,  
but does not make direct contact with the unit being tested.  
With air-gap discharge, the discharge gun is moved toward the  
unit being tested, developing an arc across the air gap. This  
method is influenced by humidity, temperature, barometric  
pressure, distance, and rate of closure of the discharge gun.  
Although less realistic, the contact-discharge method is more  
repeatable and is gaining preference to the air-gap method.  
C1  
ESD TEST METHOD  
H. BODY MIL-STD883B  
IEC1000-4-2  
R2  
C1  
1.5k  
330Ω  
100pF  
150pF  
Figure 18. ESD Test Standards  
100  
90  
Although very little energy is contained within an ESD pulse,  
the extremely fast rise time coupled with high voltages can  
cause failures in unprotected semiconductors. Catastrophic  
destruction can occur immediately as a result of arcing or  
heating. Even if catastrophic failure does not occur immediately,  
the device might suffer from parametric degradation, which can  
result in degraded performance. The cumulative effects of  
continuous exposure can eventually lead to complete failure.  
36.8  
10  
tDL  
tRL  
TIME t  
I/O lines are particularly vulnerable to ESD damage. Simply  
touching or plugging in an I/O cable can result in a static  
discharge, which can damage or completely destroy the  
interface product connected to the I/O port. Traditional ESD  
test methods, such as the MIL-STD-883B method 3015.7, do  
not fully test a products susceptibility to this type of discharge.  
This test was intended to test a products susceptibility to ESD  
damage during handling. Each pin is tested with respect to all  
other pins. There are some important differences between the  
traditional test and the IEC test:  
Figure 19. Human Body Model ESD Current Waveform  
100  
90  
The IEC test is much more stringent in terms of discharge  
energy. The injected peak current is over four times greater.  
10  
0.1 TO 1ns  
TIME t  
The current rise time is significantly faster in the IEC test.  
30ns  
60ns  
The IEC test is carried out while power is applied to  
the device.  
Figure 20. IEC1000-4-2 ESD Current Waveform  
The ADM202E/ADM1181E products are tested using both of  
the previously mentioned test methods. Pins are tested with  
respect to all other pins as per the MIL-STD-883B specification.  
In addition, I/O pins are tested as per the IEC test specification.  
The products were tested under the following conditions:  
It is possible that the ESD discharge could induce latch-up in the  
device being tested. Therefore, this test is more representative of a  
real-world I/O discharge where the equipment is operating  
normally with power applied. For peace of mind, however, both  
tests should be performed to ensure maximum protection  
during both handling and field service.  
Power-On  
Power-Off  
There are four levels of compliance defined by IEC1000-4-2. The  
ADM202E/ADM1181A products meet the most stringent level  
of compliance both for contact and for air-gap discharge. This  
means that the products are able to withstand contact discharges  
in excess of 8 kV and air-gap discharges in excess of 15 kV.  
Rev. C | Page 10 of 16