Datasheet > ADuM5210CRSZ

ADuM5210CRSZ

更新时间： 2022-04-12 23:32:05

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
24页	555K
描述
Dual-Channel Isolators with Integrated DC-to-DC Converters

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ADuM5210CRSZ 数据手册

ADuM5210/ADuM5211/ADuM5212

Data Sheet

In the case of dc or unipolar ac voltage, the stress on the insulation

is significantly lower. This allows operation at higher working

voltages while still achieving a 50-year service life. The working

voltages listed in Table 20 can be applied while maintaining the

50-year minimum lifetime, provided the voltage conforms to either

the dc or unipolar ac voltage cases. Any cross-insulation voltage

waveform that does not conform to Figure 31 or Figure 32 must be

treated as a bipolar ac waveform, and its peak voltage must be

limited to the 50-year lifetime voltage value listed in Table 20.

INSULATION LIFETIME

All insulation structures eventually break down when subjected

to voltage stress over a sufficiently long period. The rate of

insulation degradation is dependent on the characteristics of

the voltage waveform applied across the insulation. Analog

Devices conducts an extensive set of evaluations to determine

the lifetime of the insulation structure within the ADuM5210/

ADuM5211/ADuM5212.

Accelerated life testing is performed using voltage levels higher

than the rated continuous working voltage. Acceleration factors

for several operating conditions are determined, allowing

calculation of the time to failure at the working voltage of

interest. The values shown in Table 20 summarize the peak

voltages for 50 years of service life in several operating

conditions. In many cases, the working voltage approved by

agency testing is higher than the 50-year service life voltage.

Operation at working voltages higher than the service life

voltage listed leads to premature insulation failure.

RATED PEAK VOLTAGE

Figure 30. Bipolar AC Waveform

RATED PEAK VOLTAGE

The insulation lifetime of the ADuM5210/ADuM5211/

ADuM5212 depends on the voltage waveform type imposed

across the isolation barrier. The iCoupler insulation structure

degrades at different rates, depending on whether the wave-

form is bipolar ac, unipolar ac, or dc. Figure 30, Figure 31, and

Figure 32 illustrate these different isolation voltage waveforms.

Figure 31. DC Waveform

RATED PEAK VOLTAGE

NOTES

Bipolar ac voltage is the most stringent environment. A 50-year

operating lifetime under the bipolar ac condition determines

the Analog Devices recommended maximum working voltage.

1. THE VOLTAGE IS SHOWN AS SINUSOIDAL FOR ILLUSTRATION

PUPOSES ONLY. IT IS MEANT TO REPRESENT ANY VOLTAGE

WAVEFORM VARYING BETWEEN 0V AND SOME LIMITING VALUE.

THE LIMITING VALUE CAN BE POSITIVE OR NEGATIVE,

BUT THE VOLTAGE CANNOT CROSS 0V.

Figure 32. Unipolar AC Waveform

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