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ADUM2250 Arkusz danych(PDF) 1 Page - Analog Devices |
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ADUM2250 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 16 page Hot-Swappable, Dual I2C Isolators, 5 kV Data Sheet ADuM2250/ADuM2251 Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother 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 ©2007–2011 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 16-lead SOIC wide body package version (RW-16) 16-lead SOIC wide body enhanced creepage version (RI-16) High temperature operation: 105°C Safety and regulatory approvals (RI-16 package) UL recognition: 5000 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice #5A IEC 60601-1: 250 V rms (reinforced) IEC 60950-1: 400 V rms (reinforced) VDE Certificate of Conformity DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 VIORM = 846 V peak APPLICATIONS Isolated I2C, SMBus, or PMBus Interfaces Multilevel I2C interfaces Power supplies Networking Power-over-Ethernet GENERAL DESCRIPTION The ADuM2250/ADuM22511 are hot-swappable digital isolators with nonlatching bidirectional communication channels that are compatible with I2C® interfaces. This eliminates the need for splitting I2C signals into separate transmit and receive signals for use with standalone optocouplers. The ADuM2250 provides two bidirectional channels support- ing a complete isolated I2C interface. The ADuM2251 provides one bidirectional channel and one unidirectional channel for those applications where a bidirectional clock is not required. The ADuM2250/ADuM2251 contain hot-swap circuitry to prevent data glitches 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 performance, size, power consump- tion, and functional advantages compared to optocouplers. The ADuM2250/ADuM2251 integrate iCoupler channels with semiconductor circuitry to enable a complete, isolated I2C interface in a small form-factor package. 1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329; other patents pending. FUNCTIONAL BLOCK DIAGRAMS DECODE ENCODE ENCODE DECODE DECODE ENCODE ENCODE DECODE GND1 NC VDD1 NC SDA1 SCL1 GND1 NC GND2 NC VDD2 NC SDA2 SCL2 GND2 NC 8 7 5 6 4 3 2 1 9 10 12 11 13 14 15 16 ADuM2250 NC = NO CONNECT DECODE ENCODE ENCODE DECODE ENCODE DECODE GND1 NC VDD1 NC SDA1 SCL1 GND1 NC GND2 NC VDD2 NC SDA2 SCL2 GND2 NC 8 7 5 6 4 3 2 1 9 10 12 11 13 14 15 16 ADuM2251 NC = NO CONNECT Figure 1. ADuM2250 Functional Block Diagram Figure 2. ADuM2251 Functional Block Diagram |
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