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ADUM1250 Arkusz danych(PDF) 1 Page - Analog Devices

Numer części ADUM1250
Szczegółowy opis  Hot Swappable, Dual I2C Isolators
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Strona internetowa  http://www.analog.com
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ADUM1250 Arkusz danych(HTML) 1 Page - Analog Devices

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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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