ADuM1280/ADuM1281/ADuM1285/ADuM1286 Data Sheet
Rev. D | Page 16 of 18
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 ADuM1280/ADuM1281/
ADuM1285/ADuM1286.
Analog Devices performs accelerated life testing using voltage levels
higher than the rated continuous working voltage. Acceleration
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 19 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 the 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 ADuM1280/ADuM1281/
ADuM1285/ADuM1286 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 15, Figure 16, and
Figure 17 illustrate these different isolation voltage waveforms.
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. This allows operation at higher working
voltages while still achieving a 50-year service life. The working
voltages listed in Table 19 can be applied while maintaining the
50-year minimum lifetime provided the voltage conforms to either
the unipolar ac or dc voltage case. Any cross-insulation voltage
waveform that does not conform to Figure 16 or Figure 17 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 19.
Note that the voltage presented in Figure 17 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.
0V
RATED PEAK VOLTAGE
10444-015
Figure 15. Bipolar AC Waveform
0V
RATED PEAK VOLTAGE
10444-016
Figure 16. Unipolar AC Waveform
0V
RATED PEAK VOLTAGE
10444-017
Figure 17. DC Waveform
Data Sheet ADuM1280/ADuM1281/ADuM1285/ADuM1286
Rev. D | Page 17 of 18
OUTLINE DIMENSIONS
CONTROLLING DIMENSIONS ARE IN MILLIMET
ER
S
; I
NC
H DIMENSIONS
(IN PARENTHESES) ARE ROUNDE
D-OF
F MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIA
TE F
OR USE IN DESIGN.
COMPLIANT TO JEDE
C ST
AN
D
ARDS MS-012-AA
01
2407
-A
0.25 (0.0098)
0.
1
7 (
0.
0
067)
1
.
27 (0.0500)
0.40 (0.0157)
0
.50 (0.0196)
0.25 (0.0099)
45°
1.75 (0.0688)
1.35 (0.0532)
SEATING
PLANE
0.25 (0.00
98
)
0.10 (0.0040)
4
1
8 5
5.00 (0.1968)
4.80 (0.1890)
4.00 (0.1574)
3.80 (0.1497)
1.27 (0.0500)
BSC
6.20 (0.2441)
5.80 (0.2284)
0.
51
(
0.0201)
0.31 (0.0122)
COPLANARITY
0.10
Figure 18. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body (R-8)
Dimensions shown in millimeters (inches)
ORDERING GUIDE
Model
1
,
2
,
3
No. of
Inputs,
V
DD1
Side
No. of
Inputs,
V
DD2
Side
Max
Data
Rate
Max Prop
Delay, 5 V
Output
Default
State
Temperature
Range
Package
Description
Package
Option
ADuM1280ARZ
2
0
1 Mbps
50
High
−40°C to +125°C
8-Lead SOIC_N
R-8
ADuM1280WARZ
2 0 1 Mbps 50 High −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1280BRZ
2 0 25 Mbps 35 High −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1280WBRZ
2 0 25 Mbps 35 High −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1280CRZ
2 0 100 Mbps 24 High 40°C to +125°C 8-Lead SOIC_N R-8
ADuM1280WCRZ
2
0
100 Mbps
24
High
−40°C to +125°C
8-Lead SOIC_N
R-8
ADuM1281ARZ
1 1 1 Mbps 50 High −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1281WARZ
1 1 1 Mbps 50 High −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1281BRZ
1 1 25 Mbps 35 High −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1281WBRZ
1 1 25 Mbps 35 High −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1281CRZ
1 1 100 Mbps 24 High 40°C to +125°C 8-Lead SOIC_N R-8
ADuM1281WCRZ
1 1 100 Mbps 24 High 40°C to +125°C 8-Lead SOIC_N R-8
ADuM1285ARZ
2 0 1 Mbps 50 Low −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1285WARZ
2 0 1 Mbps 50 Low −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1285BRZ
2 0 25 Mbps 35 Low −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1285WBRZ
2 0 25 Mbps 35 Low −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1285CRZ
2 0 100 Mbps 24 Low −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1285WCRZ
2
0
100 Mbps
24
Low
−40°C to +125°C
8-Lead SOIC_N
R-8
ADuM1286ARZ
1 1 1 Mbps 50 Low −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1286WARZ
1 1 1 Mbps 50 Low −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1286BRZ
1 1 25 Mbps 35 Low −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1286WBRZ
1 1 25 Mbps 35 Low −40°C to +125°C 8-Lead SOIC_N R-8
ADuM1286CRZ
1
1
100 Mbps
24
Low
−40°C to +125°C
8-Lead SOIC_N
R-8
ADuM1286WCRZ
1 1 100 Mbps 24 Low −40°C to +125°C 8-Lead SOIC_N R-8
1
Z = RoHS Compliant Part.
2
Tape and reel are available. The addition of an “-RL7” suffix designates a 7” (1,000 units) tape and reel option.
3
W = Qualified for Automotive Applications.
ADuM1280/ADuM1281/ADuM1285/ADuM1286 Data Sheet
Rev. D | Page 18 of 18
AUTOMOTIVE PRODUCTS
The ADuM1280W, ADuM1281W, ADuM1285W, and ADuM1286W models are available with controlled manufacturing to support the quality
and reliability requirements of automotive applications. Note that these automotive models may have specifications that differ from the
commercial models; therefore, designers should review the Specifications section of this data sheet carefully. Only the automotive grade products
shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering
information and to obtain the specific Automotive Reliability reports for these models.
©2012–2017 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D10444-0-2/17(D)

ADUM1280BRZ-RL7

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
Digital Isolators 3kV RMS Default High Dual-CH
Lifecycle:
New from this manufacturer.
Delivery:
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