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ADUM3151

更新时间： 2024-01-05 09:31:39
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
22页 454K
描述
3.75 kV, 7-Channel, SPIsolator Digital Isolators for SPI

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ADUM3151 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：8542.39.00.01
风险等级：1.54模拟集成电路 - 其他类型：ANALOG CIRCUIT
JESD-30 代码：R-PDSO-G20JESD-609代码：e3
长度：7.2 mm湿度敏感等级：3
功能数量：1端子数量：20
最高工作温度：125 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：SSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）：260座面最大高度：2 mm
最大供电电压 (Vsup)：5.5 V最小供电电压 (Vsup)：3 V
标称供电电压 (Vsup)：3.3 V表面贴装：YES
温度等级：AUTOMOTIVE端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽度：5.3 mmBase Number Matches：1

ADUM3151 数据手册

 浏览型号ADUM3151的Datasheet PDF文件第16页浏览型号ADUM3151的Datasheet PDF文件第17页浏览型号ADUM3151的Datasheet PDF文件第18页浏览型号ADUM3151的Datasheet PDF文件第19页浏览型号ADUM3151的Datasheet PDF文件第20页浏览型号ADUM3151的Datasheet PDF文件第22页 
Data Sheet  
ADuM3151/ADuM3152/ADuM3153  
is based on the total rms voltage across the isolation, pollution  
degree, and material group. The material group and creepage  
for the ADuM3151/ADuM3152/ADuM3153 isolators are  
detailed in Table 15.  
determining the creepage clearance and lifetime of a device, see  
Figure 19 and the following equations.  
Insulation Wear Out  
V
The lifetime of insulation due to wear out is determined by its  
thickness, the material properties, and the voltage stress applied.  
It is important to verify that the product lifetime is adequate at  
the application working voltage. The working voltage supported  
by an isolator for wear out may not be the same as the working  
voltage supported for tracking. It is the working voltage  
AC RMS  
V
V
V
DC  
PEAK  
RMS  
applicable to tracking that is specified in most standards.  
TIME  
Testing and modeling have shown that the primary driver of  
long-term degradation is displacement current in the polyimide  
insulation causing incremental damage. The stress on the  
insulation can be broken down into broad categories, such as  
dc stress, which causes very little wear out because there is no  
displacement current, and an ac component time varying  
voltage stress, which causes wear out.  
Figure 19. Critical Voltage Example  
The working voltage across the barrier from Equation 1 is  
2
VRMS = VAC RMS2 +VDC  
VRMS = 2402 + 4002  
The ratings in certification documents are usually based on  
60 Hz sinusoidal stress because this reflects isolation from line  
voltage. However, many practical applications have combinations  
of 60 Hz ac and dc across the barrier, as shown in Equation 1.  
Because only the ac portion of the stress causes wear out, the  
equation can be rearranged to solve for the ac rms voltage, as  
shown in Equation 2. For insulation wear out with the  
polyimide materials used in this product, the ac rms voltage  
determines the product lifetime.  
V
RMS = 466 V  
This is the working voltage used together with the material  
group and pollution degree when looking up the creepage  
required by a system standard.  
To determine if the lifetime is adequate, obtain the time varying  
portion of the working voltage. The ac rms voltage can be  
obtained from Equation 2.  
VAC RMS = VRMS2 −VDC  
2
2
VRMS = VAC RMS2 +VDC  
(1)  
VAC RMS  
AC RMS = 240 V rms  
=
4662 − 4002  
or  
V
2
VAC RMS = VRMS2 −VDC  
(2)  
In this case, the ac rms voltage is simply the line voltage of  
240 V rms. This calculation is more relevant when the  
waveform is not sinusoidal. The value is compared to the limits  
for the working voltage listed in Table 19 for the expected  
lifetime, under a 60 Hz sine wave, and it is well within the limit  
for a 50-year service life.  
where:  
V
V
V
AC RMS is the time varying portion of the working voltage.  
DC is the dc offset of the working voltage.  
RMS is the total rms working voltage.  
Calculation and Use of Parameters Example  
Note that the dc working voltage limit in Table 19 is set by the  
creepage of the package as specified in IEC 60664-1. This value  
may differ for specific system level standards.  
The following is an example that frequently arises in power  
conversion applications. Assume that the line voltage on one  
side of the isolation is 240 V ac rms, and a 400 V dc bus voltage  
is present on the other side of the isolation barrier. The isolator  
material is polyimide. To establish the critical voltages in  
Rev. A | Page 21 of 22  
 
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