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PDF ADuM1280 Data sheet ( Hoja de datos )
| Número de pieza | ADuM1280 | |
| Descripción | 3 kV RMS Dual Channel Digital Isolators | |
| Fabricantes | Analog Devices | |
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Data Sheet
3 kV RMS Dual Channel Digital Isolators
ADuM1280/ADuM1281/ADuM1285/ADuM1286
FEATURES
Up to 100 Mbps data rate (NRZ)
Low propagation delay: 23 ns typical
Low dynamic power consumption
Bidirectional communication
3.3 V to 5 V level translation
High temperature operation: 125°C
High common-mode transient immunity: >25 kV/μs
Default high output: ADuM1280/ADuM1281
Default low output: ADuM1285/ADuM1286
Narrow body, RoHS-compliant, 8-lead SOIC
Safety and regulatory approvals
UL recognition: 3000 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice 5A
VDE Certificate of Conformity
DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
VIORM = 560 V peak
Qualified for automotive applications
APPLICATIONS
General-purpose multichannel isolation
Data converter isolation
Industrial field bus isolation
Hybrid electric vehicles, battery monitor, and motor drive
GENERAL DESCRIPTION
The ADuM1280/ADuM1281/ADuM1285/ADuM12861 are dual-
channel digital isolators based on the Analog Devices, Inc.,
iCoupler® technology. Combining high speed CMOS and
monolithic air core transformer technology, these isolation
components provide outstanding performance characteristics
superior to alternatives, such as optocoupler devices and other
integrated couplers.
With propagation delay at 23 ns, pulse width distortion is less
than 2 ns for C grade. Channel-to-channel matching is tight at
5 ns for C grade. The two channels of the ADuM1280/ADuM1281/
ADuM1285/ADuM1286 are independent isolation channels
and are available in two channel configurations with three
different data rates up to 100 Mbps (see the Ordering Guide).
Industrial grade models operate with the supply voltage on
FUNCTIONAL BLOCK DIAGRAMS
ADuM1280/
VDD1 1 ADuM1285
VIA 2
ENCODE
DECODE
8 VDD2
7 VOA
VIB 3
ENCODE
DECODE
6 VOB
GND1 4
5 GND2
Figure 1. ADuM1280/ADuM1285
ADuM1281/
VDD1 1 ADuM1286
VOA 2
DECODE
ENCODE
8 VDD2
7 VIA
VIB 3
ENCODE
DECODE
6 VOB
GND1 4
5 GND2
Figure 2. ADuM1281/ADuM1286
either side ranging from 3.135 V to 5.5 V and the automotive
grades operate from 3.135 V to 5.5 V, providing compatibility
with lower voltage systems as well as enabling a voltage
translation functionality across the isolation barrier. Unlike
other optocoupler alternatives, the ADuM1280/ADuM1281/
ADuM1285/ADuM1286 isolators have a patented refresh
feature that ensures dc correctness in the absence of input logic
transitions. When power is first applied or is not yet applied to
the input side, the ADuM1280 and ADuM1281 have a default
high output, and the ADuM1285 and ADuM1286 have a default
low output.
For more information on safety and regulatory approvals, go to
www.analog.com/icouplersafety.
1 Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329. Other patents are pending.
Rev. D
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2012–2017 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
ADuM1280/ADuM1281/ADuM1285/ADuM1286
Table 6. For All Models
Parameter
DC SPECIFICATIONS
Logic High Input Threshold
Logic Low Input Threshold
Logic High Output Voltages
Logic Low Output Voltages
Input Current per Channel
Supply Current per Channel
Quiescent Input Supply Current
Quiescent Output Supply Current
Dynamic Input Supply Current
Dynamic Output Supply Current
Undervoltage Lockout
Positive VDDx Threshold
Negative VDDx Threshold
VDDX Hysteresis
AC SPECIFICATIONS
Output Rise/Fall Time
Common-Mode Transient Immunity1
Refresh Period
Symbol Min
Typ Max
Unit
Test Conditions
VIH
VIL
VOH
VOL
II
IDDI(Q)
IDDO(Q)
IDDI(D)
IDDO(D)
VDDxUV+
VDDxUV−
VDDxUVH
0.7 VDDx
VDDx − 0.1
VDDx − 0.4
−10
3.0
2.8
0.0
0.2
+0.01
0.3 VDDx
0.1
0.4
+10
V
V
V
V
V
V
µA
IOx = −20 µA, VIx = VIxH
IOx = −3.2 mA, VIx = VIxH
IOx = 20 µA, VIx = VIxL
IOx = 3.2 mA, VIx = VIxL
0 V ≤ VIx ≤ VDDx
0.4
1.2
0.08
0.015
0.6
1.7
mA
mA
mA/Mbps
mA/Mbps
2.75 V
2.65 V
0.1 V
tR/tF
|CM|
tr
25
3
35
1.6
ns
kV/µs
µs
10% to 90%
VIx = VDDx, VCM = 1000 V,
transient magnitude = 800 V
1 |CM| is the maximum common-mode voltage slew rate that can be sustained while maintaining Vo > 0.8 VDDX. The common-mode voltage slew rates apply to both rising and
falling common-mode voltage edges.
ELECTRICAL CHARACTERISTICS—MIXED 5 V/3.3 V OPERATION
All typical specifications are at TA = 25°C, VDD1 = 5 V, VDD2 = 3.3 V. Minimum/maximum specifications apply over the entire recommended
operation range: 4.5 V ≤ VDD1 ≤ 5.5 V, 3.135 V ≤ VDD2 ≤ 3.6 V; and −40°C ≤ TA ≤ 125°C, unless otherwise noted. Switching specifications are
tested with CL = 15 pF and CMOS signal levels unless otherwise noted.
Table 7.
Parameter
SWITCHING SPECIFICATIONS
Pulse Width
Data Rate
Propagation Delay
Pulse Width Distortion
Change vs. Temperature
Propagation Delay Skew
Channel Matching1
Codirectional
Opposing-Direction
Jitter
A, WA Grades
B, WB Grades
C, WC Grades
Symbol Min Typ Max Min Typ Max Min Typ Max Unit Test Conditions
PW 1000
tPHL, tPLH
PWD
tPSK
7
40
1
50
10
3
38
10 ns Within PWD limit
25 100 Mbps Within PWD limit
35 20 25 31 ns
50% input to 50%
output
3 2 ns |tPLH − tPHL|
1.5 ps/°C
16
12 ns
Between any
two units at same
operating conditions
tPSKCD
tPSKOD
5
10
2
3
6
2
2
5
1
ns
ns
ns
1 Codirectional channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on the same side of the isolation
barrier. Opposing-direction channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on opposing sides
of the isolation barrier.
Rev. D | Page 5 of 18
5 Page 
Data Sheet
ADuM1280/ADuM1281/ADuM1285/ADuM1286
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
VDD1 1 ADuM1280/ 8 VDD2
VIA 2 ADuM1285 7 VOA
VIB 3 TOP VIEW 6 VOB
GND1 4 (Not to Scale) 5 GND2
Figure 4. ADuM1280/ADuM1285 Pin Configuration
Table 20. ADuM1280/ADuM1285 Pin Function Descriptions
Pin No. Mnemonic Description
1 VDD1
Supply Voltage for Isolator Side 1 (3.135 V to 5.5 V).
2 VIA
Logic Input A.
3 VIB
Logic Input B.
4 GND1 Ground 1. Ground reference for Isolator Side 1.
5 GND2 Ground 2. Ground reference for Isolator Side 2.
6 VOB
Logic Output B.
7 VOA
Logic Output A.
8 VDD2
Supply Voltage for Isolator Side 2 (3.135 V to 5.5 V).
VDD1 1 ADuM1281/ 8 VDD2
VOA 2 ADuM1286 7 VIA
VIB 3 TOP VIEW 6 VOB
GND1 4 (Not to Scale) 5 GND2
Figure 5. ADuM1281/ADuM1286 Pin Configuration
Table 21. ADuM1281/ADuM1286 Pin Function Descriptions
Pin No. Mnemonic Description
1 VDD1
Supply Voltage for Isolator Side 1 (3.135 V to 5.5 V).
2 VOA
Logic Output A.
3 VIB
Logic Input B.
4 GND1 Ground 1. Ground reference for Isolator Side 1.
5 GND2 Ground 2. Ground reference for Isolator Side 2.
6 VOB
Logic Output B.
7 VIA
Logic Input A.
8 VDD2
Supply Voltage for Isolator Side 2 (3.135 V to 5.5 V).
For specific layout guidelines, refer to the AN-1109 Application Note, Recommendations for Control of Radiated Emissions with iCoupler Devices.
Rev. D | Page 11 of 18
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet ADuM1280.PDF ] | |
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