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ADUM1250 Arkusz danych(PDF) 1 Page - Analog Devices |
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ADUM1250 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 12 page Hot Swappable, Dual I2C Isolators ADuM1250/ADuM1251 Rev. D Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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 www.analog.com Fax: 781.461.3113 ©2006–2011 Analog Devices, Inc. All rights reserved. FEATURES Bidirectional I2C communication Open-drain interfaces Suitable for hot swap applications 30 mA current sink capability 1000 kHz operation 3.0 V to 5.5 V supply/logic levels 8-lead SOIC RoHS-compliant package High temperature operation: 125°C Qualified for automotive applications Safety and regulatory approvals UL recognition 2500 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 APPLICATIONS Isolated I2C, SMBus, or PMBus interfaces Multilevel I2C interfaces Power supplies Networking Power-over-Ethernet Hybrid electric vehicle battery management FUNCTIONAL BLOCK DIAGRAMS ENCODE DECODE DECODE ENCODE ENCODE DECODE DECODE ENCODE VDD1 SDA1 SCL1 GND1 VDD2 SDA2 SCL2 GND2 1 2 3 4 8 7 6 5 Figure 1. ADuM1250 ENCODE DECODE ENCODE DECODE DECODE ENCODE VDD1 SDA1 SCL1 GND1 VDD2 SDA2 SCL2 GND2 1 2 3 4 8 7 6 5 Figure 2. ADuM1251 GENERAL DESCRIPTION The ADuM1250/ADuM12511 are hot swappable digital isolators with nonlatching, 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. 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. Both the ADuM1250 and ADuM1251 contain hot swap circuitry to prevent glitching data when an unpowered card is inserted onto an active bus. 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 implemented in a small form factor. 1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. |
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