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ADuM1245ARZ

更新时间： 2024-11-25 00:46:59
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亚德诺 - ADI /
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24页 470K
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Micropower, Dual-Channel Digital Isolators

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ADuM1245ARZ 数据手册

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Micropower, Dual-Channel Digital Isolators  
Data Sheet  
ADuM1240/ADuM1241/ADuM1245/ADuM1246  
FEATURES  
FUNCTIONAL BLOCK DIAGRAMS  
Ultralow power operation  
3.3 V operation  
1
2
3
20  
19  
18  
V
V
DD2  
DD1  
ADuM124x  
GND  
GND  
NIC  
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  
3.1 µA per channel quiescent current, refresh enabled  
0.1 µA per channel quiescent current, refresh disabled  
116 µA/Mbps per channel typical dynamic current  
Small, 20-lead SSOP package and small 8-lead SOIC package  
Bidirectional communication  
Up to 2 Mbps data rate nonreturn to zero (NRZ)  
High temperature operation: 125°C  
High common-mode transient immunity: >25 kV/µs  
Safety and Regulatory Approvals  
NIC  
NIC  
4
5
17  
16  
NIC  
V
/V  
ENCODE  
ENCODE  
DECODE  
DECODE  
V
V
/V  
IA OA  
OA IA  
6
7
15  
14  
13  
12  
11  
V
IB  
OB  
EN  
EN  
2
1
8
NIC  
NIC  
NIC  
NIC  
GND  
9
10  
GND  
1
2
Figure 1. 20-Lead SSOP Package Functional Block Diagram  
1
2
3
4
8
7
6
5
V
V
V
V
DD1  
ADuM124x  
ENCODE  
DD2  
V
/V  
DECODE  
DECODE  
/V  
IA OA  
OA IA  
OB  
V
IB  
ENCODE  
UL 1577 component recognition program (pending)  
3750 V rms for 1 minute per UL 1577 (20-lead SSOP)  
3000 V rms for 1 minute per UL 1577 (8-lead SOIC)  
CSA Component Acceptance Notice 5A (pending)  
VDE certificate of conformity (pending)  
GND  
GND  
1
2
Figure 2. 8-Lead SOIC Package Functional Block Diagram  
The ADuM1240/ADuM1241/ADuM1245/ADuM1246 are  
packaged in either a 20-lead SSOP for 3.75 kV reinforced  
isolation or an 8-lead SOIC for 3 kV basic isolation. The devices  
meet regulatory requirements, such as UL and CSA standards.  
DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12  
V
V
IORM = 849 V peak (20-lead SSOP)  
IORM = 560 V peak (8-lead SOIC)  
In addition to the space saving package options, the ADuM1240/  
ADuM1241/ADuM1245/ADuM1246 operate with supplies as  
low as 2.25 V. All models provide low, pulse width distortion at  
<8 ns. In addition, every model has an input glitch filter to  
protect against extraneous noise disturbances.  
1000  
APPLICATIONS  
General-purpose, low power, multichannel isolation  
1 MHz low power serial peripheral interface (SPI)  
4 mA to 20 mA loop process control  
GENERAL DESCRIPTION  
The ADuM1240/ADuM1241/ADuM1245/ADuM12461 are  
micropower, 2-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.  
The 20-lead SSOP version of the ADuM1240/ADuM1241/  
ADuM1245/ADuM1246 allows control of the internal refresh  
functions. As shown in Figure 3, in standard operating mode,  
when ENx = 0 (internal refresh enabled), the current per channel is  
less than 10 µA.  
100  
10  
EN = 0  
x
EN = 1  
x
1
0.1  
0.1  
1
10  
100  
1000  
10000  
DATA RATE (kbps)  
When ENx = 1 (internal refresh disabled), the current per  
channel drops to less than 1 µA.  
Figure 3. Typical Total Supply Current (IDD1 + IDD2) per Channel (VDDx = 3.3 V)  
as a Function of Data Rate  
1 Protected by U.S. Patents 5,952,849, 6,873,065, 7,075,329, 6,262,600. Other patents pending.  
Rev. A  
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 ©2013–2014 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 
 
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ADuM1245ARZ 替代型号

型号 品牌 替代类型 描述 数据表
ADuM1245ARZ-RL7 ADI

完全替代

 Micropower, Dual-Channel Digital Isolators
ISO7720DWR TI

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