2 Hot Swappable, Dual I C Isolators Data Sheet ADuM1250/ADuM1251 FEATURES FUNCTIONAL BLOCK DIAGRAMS 2 Bidirectional I C communication V 1 DECODE ENCODE 8 V Open-drain interfaces DD1 DD2 Suitable for hot swap applications SDA 2 ENCODE DECODE 7 SDA 1 2 30 mA current sink capability SCL 3 DECODE ENCODE SCL 1000 kHz operation 6 1 2 3.0 V to 5.5 V supply/logic levels GND GND 4 ENCODE DECODE 5 1 2 8-lead, RoHS compliant SOIC package High temperature operation: 125C Figure 1. ADuM1250 Qualified for automotive applications Safety and regulatory approvals DECODE ENCODE 8 V 1 V DD1 DD2 UL recognition SDA 2 ENCODE DECODE 7 SDA 1 2 2500 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice 5A SCL 3 ENCODE DECODE 6 SCL 1 2 VDE certificate of conformity GND GND 4 5 1 2 DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 V = 560 V peak IORM Figure 2. ADuM1251 APPLICATIONS 2 Isolated I C, SMBus, or PMBus interfaces 2 Multilevel I C interfaces Power supplies Networking Power over Ethernet Hybrid electric vehicle battery management GENERAL DESCRIPTION 1 The ADuM1250/ADuM1251 are hot swappable digital isolators Both the ADuM1250 and the ADuM1251 contain hot swap with nonlatching, bidirectional communication channels that circuitry to prevent glitching data when an unpowered card is 2 are compatible with I C interfaces. This eliminates the need for inserted onto an active bus. 2 splitting I C signals into separate transmit and receive signals These isolators are based on the iCoupler chip scale transformer for use with standalone optocouplers. technology from Analog Devices, Inc. iCoupler is a magnetic The ADuM1250 provides two bidirectional channels, supporting isolation technology with functional, performance, size, and 2 a complete isolated I C interface. The ADuM1251 provides one power consumption advantages as compared to optocouplers. bidirectional channel and one unidirectional channel for applica- With the ADuM1250/ADuM1251, iCoupler channels can be tions where a bidirectional clock is not required. integrated with semiconductor circuitry, which enables a complete 2 isolated I C interface to be implemented in a small form factor. 1 Protected by U.S. Patents 5,952,849 6,873,065 and 7,075,329. Rev. I 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. Tel: 781.329.4700 20062020 Analog Devices, Inc. All rights reserved. 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Trademarks and registered trademarks are the property of their respective owners. 06113-002 06113-001ADuM1250/ADuM1251 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 ESD Caution ..................................................................................7 Applications ...................................................................................... 1 Pin Configuration and Function Descriptions .............................8 Functional Block Diagrams ............................................................. 1 Test Conditions .................................................................................9 General Description ......................................................................... 1 Applications Information ............................................................. 10 Revision History ............................................................................... 2 Functional Description.............................................................. 10 Specifications .................................................................................... 3 Startup .......................................................................................... 10 Electrical Characteristics ............................................................. 3 Typical Application Diagram ................................................... 11 Package Characteristics ............................................................... 5 Capacitive Load at Low Speeds ................................................ 11 Regulatory Information ............................................................... 5 Magnetic Field Immunity ......................................................... 12 Insulation and Safety Related Specifications ............................ 5 Outline Dimensions ....................................................................... 13 DIN V VDE V 0884-10 (VDE V 0884-10) Insulation Ordering Guide .......................................................................... 13 Characteristics .............................................................................. 6 Automotive Products ................................................................ 13 Recommended Operating Conditions ...................................... 6 Absolute Maximum Ratings ........................................................... 7 REVISION HISTORY 3/2020Rev. H to Rev. I 5/2010Rev. B to Rev. C Changes to Side 2 (V , V ) Parameter, Table 8.................... 7 Changes to Features Section and Applications Section ............... 1 SDA2 SCL2 Changed V = 5 V, and V = 5 V to V = 3.3 V or 5 V, DD1 DD2 DD1 7/2015Rev. G to Rev. H and VDD2 = 3.3 V or 5 V .................................................................... 3 Changes to Table 4 and Table 5...................................................... 5 Changed VDD1 = 5 V, and VDD2 = 5 V to VDD1 = 3.3 V or 5 V, and VDD2 = 3.3 V or 5 V .................................................................... 4 3/2014Rev. F to Rev. G Changes to Typical Application Diagram Section Moved Typical Application Diagram Section ............................ 11 and Figure 9..................................................................................... 11 Added Capacitive Load at Low Speeds Section and Table 11 ....... 11 Changes to Ordering Guide .......................................................... 12 Moved Magnetic Field Immunity Section .................................. 12 Added Automotive Products Section .......................................... 12 Changes to Ordering Guide .......................................................... 13 12/2009Rev. A to Rev. B 9/2012Rev. E to Rev. F Changes to Features Section ............................................................ 1 Created Hyperlink for Safety and Regulatory Approvals Changes to Operating Temperature (TA) Parameter, Table 7 .... 6 Entry in Features Section ................................................................ 1 Changes to Ambient Operating Temperature (TA) Parameter, Changes to Ordering Guide .......................................................... 12 Table 8 ................................................................................................. 7 Changes to Ordering Guide .......................................................... 12 12/2011Rev. D to Rev. E Change to Ordering Guide............................................................ 12 6/2007Rev. 0 to Rev. A Changes to Automotive Products Section .................................. 12 Updated VDE Certification Throughout ....................................... 1 Changes to Features and Note 1 ...................................................... 1 7/2011Rev. C to Rev. D Changes to Table 4 and Table 5 ...................................................... 5 Change to Typical Application Diagram Section ...................... 11 Changes to Table 6 ............................................................................ 6 Updated Outline Dimensions ...................................................... 12 Changes to Ordering Guide .......................................................... 12 10/2006Revision 0: Initial Version Rev. I Page 2 of 16