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ADUM1251ARZ-RL7

更新时间： 2024-11-20 04:04:51
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亚德诺 - ADI /
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12页 334K
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Hot Swappable Dual I2C Isolators

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ADUM1251ARZ-RL7 数据手册

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Hot Swappable Dual I2C Isolators  
ADuM1250/ADuM1251  
FUNCTIONAL BLOCK DIAGRAMS  
FEATURES  
Bidirectional I2C communication  
Open-drain interfaces  
Suitable for hot swap applications  
30 mA current sink capability  
1000 kHz operation  
DECODE  
ENCODE  
DECODE  
ENCODE  
ENCODE  
DECODE  
ENCODE  
DECODE  
8
7
6
5
V
DD2  
V
1
2
3
4
DD1  
SDA  
SCL  
GND  
SDA  
SCL  
1
1
1
2
2
3.0 V to 5.5 V supply/logic levels  
8-lead SOIC lead-free package  
GND  
2
Figure 1. ADuM1250 Functional Block Diagram  
High temperature operation: 105°C  
Safety and regulatory approvals  
UL recognition  
DECODE  
ENCODE  
ENCODE  
ENCODE  
DECODE  
DECODE  
8
7
6
5
V
DD2  
V
1
2
3
4
2500 V rms for 1 minute per UL 1577  
CSA Component Acceptance Notice #5A (pending)  
VDE Certificate of Conformity (pending)  
DIN EN 60747-5-2 (VDE 0884 Part 2): 2003-01  
DIN EN 60950 (VDE 0805): 2001-12; DIN EN 60950: 2000  
DD1  
SDA  
SDA  
SCL  
1
1
1
2
SCL  
2
GND  
GND  
2
VIORM = 560 V peak  
Figure 2. ADuM1251 Functional Block Diagram  
APPLICATIONS  
Isolated I2C, SMBus, or PMBus interfaces  
Multilevel I2C interfaces  
Power supplies  
Networking  
Power-over-Ethernet  
Both the ADuM1250 and ADuM1251 contain hot swap  
circuitry to prevent glitching data when an unpowered card is  
inserted onto an active bus.  
GENERAL DESCRIPTION  
The ADuM1250/ADuM12511 are hot swappable digital  
isolators with non latching bidirectional communication  
channels compatible with I2C interfaces. This eliminates the  
need for splitting I2C signals into separate transmit and receive  
signals for use with standalone optocouplers.  
These isolators are based on iCoupler® chip scale transformer  
technology from Analog Devices, Inc. iCoupler is a magnetic  
isolation technology with functional, performance, size, and  
power consumption advantages as compared to optocouplers.  
With the ADuM1250/ADuM1251, iCoupler channels can be  
integrated with semiconductor circuitry, which enables a  
complete isolated I2C interface to be provided in a small  
form factor.  
The ADuM1250 provides two bidirectional channels  
supporting a complete isolated I2C interface. The ADuM1251  
provides one bidirectional channel and one unidirectional  
channel for those applications where a bidirectional clock is not  
required.  
1 Protected by U.S. Patents 5,952,849 and 6,873,065. Other patents pending.  
Rev. 0  
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  
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.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2006 Analog Devices, Inc. All rights reserved.  
 
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ADUM1251ARZ-RL7 替代型号

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