ADUM1400ARW Analog Devices Inc, ADUM1400ARW Datasheet - Page 29

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ADUM1400ARW

Manufacturer Part Number
ADUM1400ARW
Description
IC DIGITAL ISOLATOR 4CH 16-SOIC
Manufacturer
Analog Devices Inc
Series
iCoupler®r
Datasheet

Specifications of ADUM1400ARW

Rohs Status
RoHS non-compliant
Inputs - Side 1/side 2
4/0
Number Of Channels
4
Isolation Rating
2500Vrms
Voltage - Supply
2.7 V ~ 5.5 V
Data Rate
1Mbps
Propagation Delay
100ns
Output Type
Logic
Package / Case
16-SOIC (0.300", 7.5mm Width)
Operating Temperature
-40°C ~ 105°C
Operating Temperature (min)
-40C
Operating Temperature Classification
Industrial
Operating Temperature (max)
105C
Package Type
SOIC W
Rad Hardened
No
Lead Free Status / RoHS Status
Not Compliant

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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. In addition
to the testing performed by the regulatory agencies, Analog
Devices carries out an extensive set of evaluations to determine
the lifetime of the insulation structure within the ADuM140x.
Analog Devices performs accelerated life testing using voltage
levels higher than the rated continuous working voltage. Accel-
eration factors for several operating conditions are determined.
These factors allow calculation of the time to failure at the actual
working voltage. The values shown in Table 14 summarize the
peak voltage for 50 years of service life for a bipolar ac operating
condition and the maximum CSA/VDE approved working
voltages. In many cases, the approved working voltage is higher
than a 50-year service life voltage. Operation at these high working
voltages can lead to shortened insulation life in some cases.
The insulation lifetime of the ADuM140x depends on the
voltage waveform type imposed across the isolation barrier.
The iCoupler insulation structure degrades at different rates
depending on whether the waveform is bipolar ac, unipolar
ac, or dc. Figure 21, Figure 22, and Figure 23 illustrate these
different isolation voltage waveforms, respectively.
Bipolar ac voltage is the most stringent environment. The goal
of a 50-year operating lifetime under the ac bipolar condition
determines the Analog Devices recommended maximum
working voltage.
In the case of unipolar ac or dc voltage, the stress on the
insulation is significantly lower, which allows operation at
higher working voltages while still achieving a 50-year service
life. The working voltages listed in Table 14 can be applied while
maintaining the 50-year minimum lifetime, provided the voltage
Rev. G | Page 29 of 32
conforms to either the unipolar ac or dc voltage cases. Any cross-
insulation voltage waveform that does not conform to Figure 22
or Figure 23 should be treated as a bipolar ac waveform, and its
peak voltage should be limited to the 50-year lifetime voltage
value listed in Table 14.
Note that the voltage presented in Figure 22 is shown as sinusoidal
for illustration purposes only. It is meant to represent any voltage
waveform varying between 0 V and some limiting value. The
limiting value can be positive or negative, but the voltage cannot
cross 0 V.
AUTOMOTIVE PRODUCTS
The ADuM1400W, ADuM1401W, and ADuM1402W products
are qualified per AEC-Q100 for use in automotive applications.
Custom variants of these products may be available to meet
stringent automotive performance and quality requirements.
For more information, contact your local Analog Devices sales
representative.
ADuM1400/ADuM1401/ADuM1402
RATED PEAK VOLTAGE
RATED PEAK VOLTAGE
RATED PEAK VOLTAGE
0V
0V
0V
Figure 22. Unipolar AC Waveform
Figure 21. Bipolar AC Waveform
Figure 23. DC Waveform

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