Datenblatt-pdf.com


ADuM1281 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADuM1281
Beschreibung 3 kV RMS Dual Channel Digital Isolators
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 18 Seiten
ADuM1281 Datasheet, Funktion
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






ADuM1281 Datasheet, Funktion
ADuM1280/ADuM1281/ADuM1285/ADuM1286
Data Sheet
Table 8.
1 Mbps—A, B, C,
WA, WB, WC Grades
25 Mbps—B, C,
WB, WC Grades
100 Mbps—C,
WC Grades
Parameter
Symbol Min Typ Max Min Typ Max Min Typ Max Unit Test Conditions
SUPPLY CURRENT
No load
ADuM1280/ADuM1285 IDD1
1.1 1.6
6.2 7.0
20 25 mA
IDD2
2.0 3.5
2.7 4.6
4.8 9.0 mA
ADuM1281/ADuM1286 IDD1
2.1 2.6
4.9 6.0
15 19 mA
IDD2
1.7 2.3
3.9 6.2
11 15 mA
Table 9. 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
VDDx
VDDx − 0.2
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
0.54 0.75 mA
1.2 2.0 mA
0.09 mA/Mbps
0.02 mA/Mbps
2.75 V
2.65 V
0.1 V
tR/tF
|CM|
tr
25
2.5
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.
Rev. D | Page 6 of 18

6 Page









ADuM1281 pdf, datenblatt
ADuM1280/ADuM1281/ADuM1285/ADuM1286
Data Sheet
Table 22. ADuM1280 Truth Table (Positive Logic)
VIA Input VIB Input VDD1 State
VDD2 State
H
H
Powered
Powered
L
L
Powered
Powered
H
L
Powered
Powered
L
H
Powered
Powered
L L Unpowered Powered
X
X
Powered
Unpowered
VOA Output
H
L
H
L
H
Indeterminate
VOB Output
H
L
L
H
H
Indeterminate
Notes
Outputs return to the input state within
1.6 µs of VDDI power restoration.
Outputs return to the input state within
1.6 µs of VDDO power restoration.
Table 23. ADuM1281 Truth Table (Positive Logic)
VIA Input VIB Input VDD1 State
VDD2 State
H
H
Powered
Powered
L
L
Powered
Powered
H
L
Powered
Powered
L
H
Powered
Powered
X L Unpowered Powered
L
X
Powered
Unpowered
VOA Output
H
L
H
L
Indeterminate
H
VOB Output
H
L
L
H
H
Indeterminate
Notes
Outputs return to the input state within
1.6 µs of VDD1 power restoration.
Outputs return to the input state within
1.6 µs of VDDO power restoration.
Table 24. ADuM1285 Truth Table (Positive Logic)
VIA Input VIB Input VDD1 State
VDD2 State
H
H
Powered
Powered
L
L
Powered
Powered
H
L
Powered
Powered
L
H
Powered
Powered
L L Unpowered Powered
X
X
Powered
Unpowered
VOA Output
H
L
H
L
L
Indeterminate
VOB Output
H
L
L
H
L
Indeterminate
Notes
Outputs return to the input state within
1.6 µs of VDDI power restoration.
Outputs return to the input state within
1.6 µs of VDDO power restoration.
Table 25. ADuM1286 Truth Table (Positive Logic)
VIA Input VIB Input VDD1 State
VDD2 State
H
H
Powered
Powered
L
L
Powered
Powered
H
L
Powered
Powered
L
H
Powered
Powered
X L Unpowered Powered
L
X
Powered
Unpowered
VOA Output
H
L
H
L
Indeterminate
L
VOB Output
H
L
L
H
L
Indeterminate
Notes
Outputs return to the input state within
1.6 µs of VDD1 power restoration.
Outputs return to the input state within
1.6 µs of VDDO power restoration.
Rev. D | Page 12 of 18

12 Page





SeitenGesamt 18 Seiten
PDF Download[ ADuM1281 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
ADuM12803 kV RMS Dual Channel Digital IsolatorsAnalog Devices
Analog Devices
ADuM12813 kV RMS Dual Channel Digital IsolatorsAnalog Devices
Analog Devices
ADuM12853 kV RMS Dual Channel Digital IsolatorsAnalog Devices
Analog Devices
ADuM12863 kV RMS Dual Channel Digital IsolatorsAnalog Devices
Analog Devices

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche