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ADUM1445

更新时间： 2024-09-17 12:35:19
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亚德诺 - ADI /
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24页 440K
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Micropower Quad-Channel Digital Isolators

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ADUM1445 数据手册

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Micropower  
Quad-Channel Digital Isolators  
Data Sheet  
ADuM1440/ADuM1441/ADuM1442/ADuM1445/ADuM1446/ADuM1447  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
Ultralow power operation  
3.3 V operation (typical)  
1
2
3
16  
15  
14  
V
V
DD1  
ADuM144x  
QSOP  
DD2  
GND  
GND  
1
2
5.6 µA per channel quiescent current, refresh enabled  
0.3 µA per channel quiescent current, refresh disabled  
148 µA/Mbps per channel typical dynamic current  
2.5 V operation (typical)  
3.1 µA per channel quiescent current, refresh enabled  
0.1 µA per channel quiescent current, refresh disabled  
117 µA/Mbps per channel typical dynamic current  
Small, 16-lead QSOP  
V
V
ENCODE  
ENCODE  
ENCODE  
ENCODE  
DECODE  
DECODE  
DECODE  
DECODE  
V
V
V
V
IA  
OA  
4
5
13  
12  
IB  
OB  
V
V
/V  
IC OC  
/V  
OC IC  
6
7
8
11  
10  
9
/V  
ID OD  
/V  
OD ID  
EN  
EN  
2
1
1
GND  
GND  
2
Figure 1.  
Bidirectional communication  
Up to 2 Mbps data rate (NRZ)  
High temperature operation: 125°C  
High common-mode transient immunity: >25 kV/µs  
Safety and regulatory approvals  
UL 1577 Component Recognition Program (pending)  
2500 V rms for 1 minute per UL 1577  
CSA Component Acceptance Notice #5A (pending)  
VDE Certificate of Conformity (pending)  
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12  
The ADuM1440/ADuM1441/ADuM1442/ADuM1445/  
ADuM1446/ADuM1447 family of quad 2.5 kV digital isolation  
devices are packaged in a small 16-lead QSOP, freeing almost  
70% of board space compared to isolators packages in wide  
body SOIC packages. The devices withstand high isolation  
voltages and meet regulatory requirements, such as UL and  
CSA standards (pending). In addition to the space savings, the  
ADuM1440/ADuM1441/ADuM1442/ADuM1445/ADuM1446/  
ADuM1447 operate with supplies as low as 2.25 V.  
V
IORM = 560 VPEAK  
APPLICATIONS  
General-purpose, low power multichannel isolation  
1 MHz, low power peripheral interface (SPI)  
4 mA to 20 mA loop process controls  
Despite the low power consumption, all models of the ADuM1440/  
ADuM1441/ADuM1442/ADuM1445/ADuM1446/ADuM1447  
provide low, pulse width distortion at <8 ns. In addition, every  
model has an input glitch filter to protect against extraneous  
noise disturbances.  
GENERAL DESCRIPTION  
The ADuM1440/ADuM1441/ADuM1442/ADuM1445/  
ADuM1446/ADuM14471 are micropower, 4-channel digital  
isolators based on the Analog Devices, Inc., iCoupler® technology.  
Combining high speed, complementary metal oxide semiconductor  
(CMOS) and monolithic air core transformer technologies,  
these isolation components provide outstanding performance  
characteristics superior to the alternatives, such as optocoupler  
devices. As shown in Figure 2, in standard operating mode,  
when ENx = 0 (internal refresh enabled), the current per channel is  
less than 10 µA. When ENx = 1 (internal refresh disabled), the  
current per channel drops to less than 1 µA.  
1000  
100  
10  
EN = 0  
x
EN = 1  
x
1
0.1  
0.1  
1
10  
100  
1000  
10000  
DATA RATE (Mbps)  
Figure 2. Typical Total Supply Current per Channel (VDDx = 3.3 V)  
1 Protected by U.S. Patents 5,952,849, 6,873,065, 7,075,329, 6,262,600. Other patents pending.  
Rev. 0  
Document Feedback  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rightsof third parties that may result fromits use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks andregisteredtrademarks are the property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Technical Support  
©2013 Analog Devices, Inc. All rights reserved.  
www.analog.com  
 
 
 
 
 
 
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