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ADuM7642CRQZ PDF预览

ADuM7642CRQZ

更新时间： 2024-02-14 13:00:03
品牌 Logo 应用领域
亚德诺 - ADI 驱动程序和接口接口集成电路PC
页数 文件大小 规格书
20页 392K
描述
1 kV RMS Six-Channel Digital Isolators

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ADuM7642CRQZ 技术参数

是否无铅：含铅是否Rohs认证：符合
生命周期：Active包装说明：SSOP,
针数：20Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8543.70.99.60
风险等级：1.57Samacsys Confidence：4
Samacsys Status：Released2D Presentation：https://componentsearchengine.com/2D/0T/421531.2.2.png
Schematic Symbol：https://componentsearchengine.com/symbol.php?partID=421531PCB Footprint：https://componentsearchengine.com/footprint.php?partID=421531
3D View：https://componentsearchengine.com/viewer/3D.php?partID=421531Samacsys PartID：421531
Samacsys Image：https://componentsearchengine.com/Images/9/ADUM7642CRQZ.jpgSamacsys Thumbnail Image：https://componentsearchengine.com/Thumbnails/2/ADUM7642CRQZ.jpg
Samacsys Pin Count：20Samacsys Part Category：Integrated Circuit
Samacsys Package Category：Small Outline PackagesSamacsys Footprint Name：QSOP-20
Samacsys Released Date：2018-08-06 07:19:52Is Samacsys：N
接口集成电路类型：INTERFACE CIRCUITJESD-609代码：e3
长度：8.66 mm湿度敏感等级：1
功能数量：1最高工作温度：105 °C
最低工作温度：-40 °C封装代码：SSOP
峰值回流温度（摄氏度）：260座面最大高度：1.75 mm
最大供电电压：5.5 V最小供电电压：3 V
标称供电电压：3.3 V温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子节距：0.64 mm
处于峰值回流温度下的最长时间：30宽度：3.91 mm
Base Number Matches：1

ADuM7642CRQZ 数据手册

 浏览型号ADuM7642CRQZ的Datasheet PDF文件第14页浏览型号ADuM7642CRQZ的Datasheet PDF文件第15页浏览型号ADuM7642CRQZ的Datasheet PDF文件第16页浏览型号ADuM7642CRQZ的Datasheet PDF文件第17页浏览型号ADuM7642CRQZ的Datasheet PDF文件第19页浏览型号ADuM7642CRQZ的Datasheet PDF文件第20页 
ADuM7640/ADuM7641/ADuM7642/ADuM7643  
Data Sheet  
The preceding magnetic flux density values correspond to specific  
current magnitudes at given distances from the ADuM7640/  
ADuM7641/ADuM7642/ADuM7643 transformers. Figure 23  
shows these allowable current magnitudes as a function of  
frequency for selected distances. As shown in Figure 23, the  
ADuM7640/ ADuM7641/ADuM7642/ADuM7643 are extremely  
immune and can be affected only by extremely large currents  
operated at high frequency very close to the component. For the  
1 MHz example noted previously, a 1.2 kA current would have  
to be placed 5 mm away from the ADuM7640/ADuM7641/  
ADuM7642/ADuM7643 to affect the operation of the component.  
1000  
MAGNETIC FIELD IMMUNITY  
The magnetic field immunity of the ADuM7640/ADuM7641/  
ADuM7642/ADuM7643 is determined by the changing magnetic  
field, which induces a voltage in the transformer receiving coil  
large enough to either falsely set or reset the decoder. The following  
analysis defines the conditions under which this can occur. The  
3 V operating condition of the ADuM7640/ADuM7641/  
ADuM7642/ADuM7643 is examined because it represents the  
most susceptible mode of operation.  
The pulses at the transformer output have an amplitude greater  
than 1.0 V. The decoder has a sensing threshold at approximately  
0.5 V, thus establishing a 0.5 V margin in which induced voltages  
can be tolerated. The voltage induced across the receiving coil is  
given by  
100  
10  
1
2
V = (−dβ/dt) ∑ π rn ; n = 1, 2, … , N  
where:  
β is magnetic flux density (gauss).  
rn is the radius of the nth turn in the receiving coil (cm).  
N is the total number of turns in the receiving coil.  
0.1  
Given the geometry of the receiving coil in the ADuM7640/  
ADuM7641/ADuM7642/ADuM7643 and an imposed  
requirement that the induced voltage be, at most, 50% of the 0.5 V  
margin at the decoder, a maximum allowable magnetic field at a  
given frequency can be calculated. The result is shown in Figure 22.  
1000  
DISTANCE = 5mm  
DISTANCE = 100mm  
DISTANCE = 1m  
0.01  
1k  
10k  
100k  
1M  
10M  
100M  
MAGNETIC FIELD FREQUENCY (Hz)  
Figure 23. Maximum Allowable Current for Various  
Current-to-ADuM7640/ADuM7641/ADuM7642/ADuM7643 Spacings  
Note that at combinations of strong magnetic field and high  
frequency, any loops formed by printed circuit board traces can  
induce error voltages sufficiently large to trigger the thresholds  
of succeeding circuitry. Take care in the layout of such traces to  
avoid this possibility.  
100  
10  
1
0.1  
0.01  
0.001  
1k  
10k  
100k  
1M  
10M  
100M  
MAGNETIC FIELD FREQUENCY (Hz)  
Figure 22. Maximum Allowable External Magnetic Flux Density  
For example, at a magnetic field frequency of 1 MHz, the maximum  
allowable magnetic field of 0.5 kgauss induces a voltage of 0.25 V at  
the receiving coil. This voltage is approximately 50% of the sensing  
threshold and does not cause a faulty output transition. Similarly, if  
such an event occurs during a transmitted pulse and is of the  
worst-case polarity, it reduces the received pulse from >1.0 V to  
0.75 V, still well above the 0.5 V sensing threshold of the decoder.  
Rev. 0 | Page 18 of 20  
 
 
 
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